close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3051309

код для вставки
Aug. 28, 1962
J. D. HELM ETAL
3,051,297
BAG MAGAZINE
Filed Nov. 6, 1959
8 Sheets-Sheet 1
INVENTORS
Jhck D. M24”
By FRAA/K 4. IVOPA’IA'S
Aug. 28, 1962
3,051,297
J. D. HELM ETAL
BAG MAGAZINE
Filed Nov. 6, 1959
8 Sheets-Sheet 2
$3.
INVENTORS
JIM/c D. Ila-4M
By
Q1
F'RnmK A.
one/0s
@9477”
477020675
Aug. 28, 1962
J. D. HELM ETAL
3,051,297
BAG MAGAZINE
Filed Nov. 6, 1959
8 Sheets-Sheet 4
Q
/
INVENTGRS
Jhck D. l/EZM
OPK/IVS \
lrrwweys
Aug- 28, 1952
J. D. HELM ETAL
3,051,297
BAG MAGAZINE
Filed Nov.- s, 1959
s Sheets-Sheet 5
III
92
1
IE‘ 5 INVENTORS
J79cl< D. IVEAM
By Fiemvk A. ?oPx/A/s
United Sétates Patent G?ice
1
2
, FIGURE 5 is a rear vertical sectional view taken along
3,051,297
BAG MAGAZINE
M51297
Patented Aug. 28, 1962
the line and looking in the direction of the arrows 5-7-5
of FIGURE 1 to more clearly illustrate the apparatus for
_
Jack D. Helm and Frank L. Hopkins, Minneapolis, Mrnrn,
assignors to Bemis Bro. Bag Company, Minneapolis,
Minn, a corporation of Missouri
Filed Nov. 6, 1959, Ser. No. 851,295
adj'ustably varying the positions of the side assemblies
relative to one another and to illustrate the mechanism
for aligning bags held by the bag magazine;
FIGURE 6 is an enlarged ‘fragmentary vertical sec
tional view of the mechanism for adjustably positioning
This invention relates to apparatus for holding a p111
a side assembly on the bag magazine in order to vary
rality of bags and automatically feeding the bags held by 10 the transverse distance between the side assemblies, said
said apparatus to a predetermined position. More par
View ‘being taken along the line and looking in the direc
ticularly this invention relates to a bag magazine for
tion of the arrow 6—6 of FIGURE 1;
holding a plurality of bags and feeding the foremost bag
‘FIGURE 7 is ari enlarged vertical view of the side
18 Claims. (Cl. 198-165)
in the apparatus to a predetermined location, said maga
belt drive mechanism, said view being taken along the
zine having appropriate adjustments to make said maga
zine readily useable for holding and feeding ‘bags of any
line and looking in the direction of the arrows 7——7 of
FIGURE 2;
FIGURE 8 is a fragmentary top view, part being
shown in section, of the mounting of the pusher ‘slats on
the drive chain, said view generally being taken along
the line and looking in the direction of the arrows 8-8
of FIGURE 4;
FIGURE 9 is an enlarged fragmentary View of the
side belt drive linkages between the two side assemblies
one of a large number of different sizes.
It is an object of this invention to provide a new and
improved bag magazine that may be easily loaded with
bags while the unit is still running. It is a ‘further ob
ject of this invention to provide a new and improved bag
magazine that is adjustable for retaining and feeding ‘bags
of various heights and widths. t is a still further ob
ject of this invention to provide a new and improved bag
magazine having mechanism for properly aligning a plu
rality of bags on the bag magazine once the bags have
and part of the control mechanism for actuating the bot
' tom and side belt drives, said view being generally taken
along the line and looking in the direction of the arrows
9-9 of FIGURE 3;
been loaded on said magazine.
It is another object of this invention to provide in a
bag magazine, new and improved feed assemblies that are
FIGURE 10 is a top sectional view of a gear box and
the mechanism located therein, said view being general
readily adjustable to vary the rate of feed of bags by 30 ly taken along the line and looking in the direction of
said bag magazines and that may be readily adjusted to
feed bags of different sizes. It is still another object of
this invention to provide new and improved mechanism
the arrows 10~_—'10 of FIGURE 9;
FIGURE vl1 is a fragmentary top view of one of the
side assemblies and a gear box mounted thereon to il
in a bag magazine for driving the side belts and the bot
tom belts of said magazine wherein the drive for each of
the aforementioned types of belts are separately adjust
lustrate the mounting of the front, and rear side, guides,
and the center bag guide, the side belt, assembly ijear
wardly of the front side guide not being illustrated. The
View is generally taken along the line, and looking in the
able to vary the amount of movement of said belts per
cycle of operation.
direction of the arrow 11;11 of FIGURE 1; _
Other and further objects of the invention are those
inherent in the invention herein illustrated, described in
the claims, and will be apparent as the description pro
ceeds.
To the accomplishment of the foregoing and related
ends, this invention then comprises the features herein
after fully described and particularly pointed out in the 45
claims, the description setting forth in ‘detail certain illus
trative embodiments of the invention, these being indi
cative, however, of but a few of the various ways in which
the principles of the invention may be employed.
The invention is illustrated by reference to the draw
ings in which corresponding numerals refer to the same
parts and in which:
FIGURE 1 is a side elevational view of the bag maga
,
,
FIGURE 12 is a ‘schematic illustration of the air and
electric circuitry ofithe bagmagazine of this invention.
FIGURE ‘12A schematically illustrates the valve posi
tion of the four way master control valve for actuating
the drive pistons to advance the drive belts;
_
FIGURE 12B schematically illustrates the valve posi-'
tion of the four way master control valve for retracting
the drivepistons.
7
‘FIGURE 13 is an enlarged fragmentary view of the
mounting of a rear side guide, the rear ‘guide being shown
in dotted lines in position to roughly align a plurality of
bags;
,
,
.
FIGURE 14 is a fragmentary view of a side belt
drive piston cylinder combination, part of said view
being shown in section to illustrate a ‘second embodiment
zine of this invention and a portion of an automatic bag
of apparatus to adjust the piston stroke to a desired
feeding machine, the portion of the side panel of the bag
length.
magazine being broken away to illustrate portions of the
bag support and the side and bottom belt drive mecha
nisms;
FIGURE 2 is a top sectional view of the bag magazine
illustrated in FIGURE 1, the top portion of the side pan
els ‘being broken away to illustrate the side belts and the
bag support and conveyor elevation adjustment;
FIGURE 3 is a front view of the bag magazine, said
view illustrating mechanism that permits the magazine to
be adjusted to hold bags of different widths and structure
for varying the elevation of the bag support and convey
or assembly;
FIGURE 4 is a vertical side sectional view taken along
the line and looking in the direction of the arrows 4—4
of FIGURE 2 to more clearly illustrate the drive of the
bottom belts and the apparatus for adjustably varying the
elevation of the bag support and conveyor assembly; 1
N
‘
FIGURE 15 is a front view of the overrunning clutch
illustrated inFIGURE 3 to show more details of the
clutch and a fragmentary view of the structure that drives
and is driven by said clutch. ‘ ‘
\
>
,
Referring in particular to FIGURES 1 and 2 there‘
is illustrated the bag magazine of thisinvention, gen
erally designated 10, for automatically feeding a bag 9
to the feed line F—_'F where the bag may be picked up
by, for example, the bag pick-up arm assembly 13 of
the automatic bag‘ feeding machine, generally designated
11, such as described in our copending application, Ser;
No. 806,955, ?led April 16, 1959. After the bag has
been fed to the aforementioned feed line and picked up
by the bag pick-up arm assembly 13, other operations may
70 be performed on a bag such as using a bag opening arm
assembly 14 in conjunction with the assembly 13 to
open a bag prior to its being positioned on a hopper
‘3,051,297
4
(not shown) by the bag lift assembly 12 (partially illus
trated). The bag magazine includes a right side assem
bly 21, a left side assembly 22, a base 23 which may
be secured to the floor or foundation 20 by conventional
means (not shown), a bag support and conveyor assem
bly 25, and appropriate air and electrical controls for
the aforementioned structure.
Each of the side assem
blies are generally of the same construction, except that
one is a “lefthand assembly” and the other is a “right
8) and at the bottom to the bottom chain by a second
bracket 50. Each of the rectangular plates are secured to
the aforementioned brackets by rivets 59A so that for the
most part the rectangular plates extend parallel to the
adjacent portions of the chains. The pusher slats mounted
on the top and bottom chains in combination with the
chains will be referred to as a side belt 57.
Each bracket 50 is secured to a plate adjacent the
juncture of the blade with a plate and is of a length
that is substantially smaller than the width dimension
'X of the plate. A suf?cient number of plates are secured
to the chains so that the leading edge 52A of one plate
hand assembly” and other differences which will be noted
hereinafter. Therefore, for the most part, only one of
the side assemblies will be described.
is within close proximation of the trailing edge 52B
The right hand assembly includes a side frame 28
of the adjacent plate. The width X of each of the plates
having a side panel 35 secured thereto by screws 36.
The side frame 28 includes a pair of spaced parallel up 15 is preferably of a dimension, for example, slightly greater
than the thickness of a bundle of 25 bags. When the
rights 29, 30, a top frame member 31, and an inter
blade members are extending at generally right angles
mediate frame member 37 joined together to form a
to the aforementioned chains, a pusher slat and the blade
frame portion 40 (similar to that shown in FIGURE
of the pusher slat adjacent to the trailing edge of the
4) each of the uprights and the frame members being
aforementioned pusher slat form a pocket indicated by
made of a channel ‘iron. A plurality of spaced vertical
bracket 8.
braces 32, 33, and 34 are secured at one end to the
Hingedly secured by a hinge 59 to the inner ?ange
frame member 37 in depending relation thereto. A bot
portion of each intermediate frame member 37 is a J
tom brace 38 is secured to the respective bottom ends
shaped rear side guide 6%, the long leg of the J being
of the braces 32, 33, while bottom brace 39 is secured
secured to said hinge (see FIGURES 5 and ll). The
to~the upright 30 and brace 34.
rear guide normally extends in a downwardly vertical
The left hand side assembly includes a side frame 28
direction relative to the member 37; however, when the
having a frame portion '40 of the construction above
guide is moved to a generally horizontal position, the
described, a plurality of spaced vertical braces 33, 34
guide extends transversely inwardly of the adjacent plates.
secured at one end to the framemember 37 in depend
Mounted on the web portion 31a of the top frame mem
ing relation thereto, and a bottom brace 39 secured to 3O
ber to extend inwardly therefrom is an elongated front
the lower ends of upright 30 and brace 34 (see FIGURE
side guide 62 which is generally J-shaped in cross section
4). A side panel 35 is secured to the rear portion of
(see FIGURE 11). The front guide has a plurality of
frame portion 40' by screws 36. Secured by screws 36
transverse ‘slots 63 formed in the long leg of the J which in
to members 34, 39 and 30 of the left hand assembly
immediately below panel 35B is a panel 35C. Also 35 conjunction with the screws 64 extended through the slots
secured by screws 36 to the front lower portion of
frame 28 is a panel 35D.
_ Mounted in each of the rectangular frame portions
is a side conveyor assembly 26, said side conveyor assem
bly including a front vertical drive shaft 43 having an
and threaded into the web 31a forms means for adjustably
positioning said guide relative to the frame member. The
side guide has a vertically extending web portion 620: that
along its longitudinal length is shaped to have a converging
portion 628 and a straight portion 62C relative to the
upper end journalled for rotation in bearing 44 which
opposite side ‘assembly. The purpose of shaping the guide
is mounted on the top frame member 31 and a lower
in the aforementioned manner Will become clear herein
after. 'The front guide is of a length to extend from the
end-journalled for rotation in bearing 46 which is mounted
front end of the magazine to approximately the mid-por
tion of the magazine.
45
Each side assembly includes a longitudinally extending
A rear vertical shaft 48 is mounted adjacent to the
center bag guide 58 having a vertically extending web
upright 30, said shaft being mounted on the frame mem
portion attached to a pair of center guide supports 61
bers 31 and 37 respectively. Intermediate the drive
intermediate the frame member.
Each of the bearings
44, 46 are mounted adjacent to the upright 29. '
(only one shown) which are in turn retained in an adjust
shaft and the shaft 48, an idler shaft 47 is journalled
for rotation in the top and bottom bearings 44, 46 which 50 ed position in bosses 61A by set screws (not shown). The
bosses are mounted on the respective intermediate frame
are mounted on frame members 31 and 37 respectively,
member and the supports are “set” so that the center bag
said idler shaft being mounted more closely adjacent
guide web portions are located in substantially the same
shaft '43 than shaft 48. A pair of sprockets 56 is keyed
plane as the corresponding web portion 623. The guide
in spaced relation on both the drive shaft and idler shaft
58 has a converging web portion 58A that is provided for
respectively and rotatably mounted in spaced relation
the same reason that the front guide 62 is provided with
on the shaft 48. A chain 49 drivingly connects the top
a converging portion.
set of- sprockets 56 while a second chain 49 drivingly
Each of the side assemblies is secured to a slide bracket
'
70 by bolts 71 which are extended through opposite side
~To each of the top frame and intermediate frame
?anges 78A of said bracket and are secured to the respec
members forwardly of the shaft 48, there is secured a‘
block 65. A bolt 66 is rotatably mounted in the upright 60 tive vertical braces 33, 34 (see FIGURES 2, 4 and 6).
30 to have the threaded portion 66A threaded through
Each slide bracket in turn is slideably secured to the top
an aperture in the bottom of the shaft 48 and to have
plate 73' of the base 23 by structure set forth hereinafter.
one end rotatably secured in the block 65. A second
Base 23 includes four channel iron members 76 joined
bolt 66 (not shown) is likewise mounted and threaded
together to form a rectangular frame 72 and a top plate
65
through the top end of the shaft 48. The bolts 66 and
73 mounted on said frame. A'transversely extending key
the mounting thereof form means for supporting the
75 is secured to the top plate by screws 69. Each slide
shaft 48' and adjustably tensioning a side belt since by
bracket is slideably secured to an opposite transverse end
turning both bolts in one direction, the shaft 48 will be
portion of the aforementioned top plate by four bolts 77
moved in a longitudinal direction.
which are extended through apertures located in the corner
connects the lower set of sprockets.
A plurality of vertically extending pusher slats 65,
each having a blade 54 and a rectangular plate 52 formed
integral with the blade to extend at right angles to said
blade, are secured at the top to the top chain by a bracket
50 that forms a side piece in the top chain (see FIGURE 75
portions of the slide bracket, thence through the elongated
transverse slots 79 formed in the top plate, and secured
in the pair of spaced transversely extending adjustable
base clamps 68 to hold said base clamps in slideable en
gagement with the bottom of the top plate. Each of the
3,051,297‘
5
aforementioned bolts 77 extends through an offset 703
formed on the opposite transverse bottom edge portions
of the slide bracket for spacing the remaining portion of
the bracket above plate 73. A rectangular keyway 81 is
inner race in the direction of arrow 127 but not in the
opposite direction. The purpose of providing the over
running clutch and clutch arm will become apparent
hereinafter.
Secured to the front end of the bag support is a bag
step 120‘. The bag stop is preferably formed with a
formed in the central transverse oifset 70C of the slide
bracket to form a matching ?t with the key 75.
longitudinally extending ?ange having an elongated slot
Formed on the outer end of right offset 76C above the
aforementioned keyWay is a split clamp bracket 85 having
formed therein so that it may be secured to the bag sup
a transverse aperture 86 formed therein. A clamp bolt 87
port in a longitudinally adjusted position by a screw ex
is extended through the vertical aperture formed in the 10 tended through said slot and threaded into said bag sup
upper split section 85a of the aforementioned clamp and
port.
is threaded into the lower split section 855. A clamp
The rearward end of the bag support includes a trans
bracket 84 of the same general construction as bracket 85
verse bag support shaft 128 secured at either end in
is formed above the left offset.
An adjustment nut 91 which is internally threaded in
the ?ange portions 116. Rotataibly mounted on the shaft
128 intermediate the ?anges is a sleeve 13%. One end of
the radially extending elevating shaft 129 is secured to
the mid portion of the sleeve 130. The elevating shaft
is retained at the desired elevation by positioning said
shaft in the support clamp sleeve 101 and tightening the
clamp bolt 14%’. The clamp bracket 110 and ‘the elevat
ing shaft form means for adjustably varying the eleva
tion of the rear portion of the bag support.
The two [radially extending studs 124 are secured in
one direction is mounted in the transverse aperture of one
of the clamp brackets while an adjustment nut 92 of the
same construction, except that it faces the opposite direc
tion, is mounted in the clamp bracket 84. A transverse
shaft 90 having one end portion threaded to correspond
with the threads in the adjustment nut in the lefthand
side is threaded into said adjustment nut While the opposite
end portion of said shaft, which has oppositely pitched
threads, is threaded into the adjustment nut 91 on the
diametrically opposite sides of the internally threaded
righthand side. A hand wheel 97 is mounted on the end 25 collar 123 and are pivotally secured in the outer clevised
of the extension 94 which is joined to one end of the shaft.
end of the crank arm (see FIGURE 2). The forward
An upright bracket 96 is secured at one end to a channel
end 139A of the longitudinal extending shaft 1139 has
iron 76 by bolts 93 and has at the other end an aperture
threads that ‘form a matching ?t with the internally
through which the extension 94 passes. The upright is
threaded collar. As a result, when the shaft is rotated
abuttingly engaged in one side by a thrust washer 99 30 relative to the collar, the collar moves ‘axially on the shaft
mounted on the extension and on the opposite side by the
relative to said shaft. A cotter key 140 is provided in
handwheel 97.
the forward end of ‘the shaft to prevent the shaft from
By turning the handwheel 97 in the appropriate direc
being turned out of the collar.
tion, the side assemblies are translated towards the longi
A collar M1 is pivotally mounted in the upper clevised
tudinal axis L'—L or away from said axis. By ?rst loosen 35 end of the support bracket 143, there being a pair of
ing the clamp bolt 87 of one of the split clamps and then
turning the adjustment nut therein, only the adjacent side
assembly will be translated relative to the longitudinal
axis.
Mounted to overlay the base 23 and to extend the longi
tudinal length of the side assemblies intermediate said side
assemblies is a bottom bag support and conveyor assembly
radially extending studs 142 secured -to diametrically op
posite sides of the collar and retained in said clevised
end. The support bracket 143 extends downwardly and
inwardly from said clevised end to ‘be secured to the
outer end of the base 23 by bolts ‘144.
The forward end of an elongated tube 14-7 is ?xedly
secured in the collar 141. A bearing (not shown) is also
mounted in the collar and a second bearing (not shown)
includes a clamp bracket 10!) which has a vertically split
is mounted in the rear end of the tube. The shaft 139 ex
sleeve 101 positioned outwardly from the base 23 by a
tends through :the aforementioned tube and is journall'ed
modi?ed T-bracket portion 105, the cross bar 106 of said 45 for rotation in the aforementioned bearings (not shown).
T-bracket being secured to the rear channel iron 76 by
The shafts extends rear‘wardly of the tube a suf?cient dis
bolts 103. A clamp bolt 107 is extended through one
tance to have the hand wheel 1-48 keyed thereto, said
aperture formed in one of the sleeve offsets 102 and
handwheel having a hub 148A, that bears against the
threaded into the other sleeve offset, there being an offset
rear end of ‘the tube. As a result of the aforementioned
formed integral with each of the half sections of the afore 50 mounting of the shaft, the shaft is prevented from mov
mentioned split sleeve.
‘
ing in a longitudinal direction while at the same time being
Secured to the front channel iron 76 by a plurality of
free to pivot about the pivot axis of studs 142. By rotat
bolts 109 are two horizontally spaced mounting brackets
ing the hand Wheel in the proper direction, the collar 123
99, said brackets in turn rotatably mounting the crank
is moved rearwardly along shaft 139 (arrow 151). Since
shaft 110. A crank arm 111 is keyed to the outer end of 55
the collar [123 is pivotally mounted in the outer end of
the crank shaft. Keyed to the opposite end of the shaft
the crank arm, as the collar 123 moves axially along the
intermediate the side assemblies is the sleeve 113 which
shaft, the crank arm is rotated in the direction of arrow
forms the web of the 'U-shaped bracket 122, said bracket
156) about the crank shaft and in turn rotates the crank
having the legs 114 extending outwardly from the shaft
60 shaft to rotate the Uabracket in the same direction. As
at a different radial angle than the crank arm.
the U-shaped bracket is rotated in the direction of the
Mounted in the outer end of each of the U-bracket legs
arrow 150, thestuds 1118 move rearward-1y in sliding en
114 is an outwardly extending stud 118 which underlies
gagement
with the forward end ‘of the bag support to ele
one of the depending ?anges 116 of the bag support 115',
vate
said
forward
end, it being understood that the maxi
said support being U-shaped in transverse cross section.
A bearing block 123 is secured to the front portion of each 65 mum elevation of the bag support is obtained when the
legs of the U~shaped bracket extend directly upward from
of the ?anges 116 for journalling the transversely ex
the
crank shaft. The rear end of the bag support may
tending drive shaft 117 forwardly of the studs 118 (see
25.
(See FIGURES’ l-S.)
The support assembly 25
FIGURE 5). A drive sheave 121 of a diameter to extend
to a higher elevation than the bag support 115 is keyed on
each of the outer ends of the drive shaft 117. Keyed to
the drive shaft intermediate the depending ?ange at 1210
is the inner race 12121 of the overrunning clutch 125
(FIGURE-S 3, 4 and 15). Rotatably located on the drive
shaft and keyed at 1210 to the outer race 12151’ of said
clutch is the clutch arm 126, the outer race driving the
now be set at the proper elevation by loosening the
clamp 'bol-t 197, and then moving the rear end of the
bag support to the desired elevation and ?nally again
tightening the clamp bolt 107.
An elongated horizontally extending slot 153 is formed
in the rear portion of each of the bag support depending
?anges. A stud jbolth155 is secured in an adjusted posi
75 tion in each ?ange along the length of the slot. Each
3,051,297
2%
7
Fixedly secured to the mid-portion of the switch rod is
a transversely extending switch plate 200. Threadedly
of the stud bolts extend outwardly from the adjacent ?ange
to have rotatably mounted thereon a sheave 154, the
sheaves being of a diameter to extend above the bag
mounted in the lower end of the switch plate is cap screw
201 having a lock nut 202 mounted thereon for holding
support.
Secured to each of the depending ?anges at an eleva
tion above the axis of rotation of the drive sheaves and
slightly inwardly toward the central transverse axis T——T
from said rotational axis is a transversely extending belt
support bar 157. A belt support bar 158 likewise is
secured to each of the depending ?anges to be located 10
above and forwardly of the rotational axis of the sheaves
the 'cap screw in an adjusted position.
The cap screw
201 extends rearwardly of the plate and is located in a
position for engaging the push button 2030f the forward
drive limit switch 190 when the piston is retracted in the
cylinder 178. The cap screw and lock nut 201, 202 pro—
vide means for adjustably setting the rearward limit of
the piston stroke.
Threadedly mounted in the switch plate at a higher ele
1154. A horizontally extending belt guide 159 is mount
vation than the cap screw 201 is a cap screw 206. The
ed on the bag support to extend outwardly from each
lock nut 207 is provided for holding the cap screw 206 in
of the depending ?anges to support the upper surfaces
of the bottom belts ‘156 at a slightly higher elevation than 15 an adjusted position, said cap screw being mounted to en
gage the push button 208 of the return limit switch 189
the top surface of the bag support, each of said belts
at the forward end of the piston stroke. The lock nut 207
being extended around a drive sheave, then rearwarclly and
and cap screw 206 form means for adjustably setting the
over the top of the belt support bar 157, next rearwardly
forward limit of the piston stroke.
over the belt support bar .158, then around the sheave
Threadedly mounted in the block 178A of the cylinder
154, thence ‘forwardly over the top of the belt guide and
178 to extend into the interior of the cylinder 178 to be
in supporting engagement therewith to be extended around
abuttingly engaged by the piston 17813 and forming ‘a stop
the drive sheave. Each of the belt guides has a depend
to prevent further retracting movement of the piston is
ing ?ange which is secured to the bag support depending
?ange by conventional means such as bolts 16-0.
a cap screw 198. As will be more apparent hereinafter,
two-way acting cylinder 164, said cylinder in turn having
stroke.
The mechanism for driving the bottom belts 156 iri 25 by turning the cap screw 198 the length of the piston
stroke and thereby the rate of “forward feed” of the bags
cludes the previously described drive shaft 117, drive
may be varied any desired increment. A lock nut 199 is
sheaves 121, the overrunning clutch 125, and the clutch
provided for retaining the cap screw in ‘a “set” position.
arm 126 (see FIGURE 4). The clevis end of the piston
When the setting of cap screw 198 is changed, the setting
rod 162 is pivotally connected by pivot 163 to the outer
of cap screw 201 is accordingly changed so that limit
end of the clutch arm. The opposite end of the piston
switch 190 is actuated at the retracted end of the piston
rod is connected to a piston (not shown) located in the
_
A second embodiment of a side belt drive piston
1a clevis end 165 pivotally connected by a pivot 166 to
a pivot bracket 167. The pivot bracket is secured to the
bottom of the bag support. A bellows 168 is mounted
cylinder combination, generally designated 171 (see FIG
URE 14) includes a cylinder 172 having ‘a back end block
on the piston rod and has one end thereof secured to the
cylinder and the opposite end secured to the clevis end
of the piston rod. Ports 303, 309 are fluidly connected
to respective opposite ends of the cylinder ‘164- to pro
vide for two-way actuation of the piston contained there 40
172A. A variable length spacer 173 is mounted within
the cylinder in abutting engagement with the block 172A,
said spacer forming a stop to limit the rearward move
ment of the piston 174 in said cylinder. In the event it
is desired to change the length of piston stroke, a spacer
of a diiferent axial length may be used in place of the
11].
original spacer mounted in the cylinder.
The mechanism for driving the side belts includes the
Secured to the respective front web portions of the
right front shaft extension 42 having the overrunning
frame member 31 by bolts 217 is a righthand gear lbox
clutch 53 mounted thereon (see FIGURES 1 and 7). A
211 and a lefthand gear box 212 (see FIGURES 3, 9, and
radially extending clutch arm 175 is rotatably mounted
10). Since the structure of each of the gear boxes is
on the shaft extension in driving engagement with the
substantially identical except that one is a righthand gear
outer race of the clutch which in turn drives the inner
box ‘and the other is 1a lefthand gear box, for the most
race of said clutch in only one direction. The outer end
part only gear box 211 will be described. The drive shaft
of the clutch arm is pivotally connected in the clevis end
of the clevis member 176 by a pivot member 182. The 50 43 extends upwardly through apertures formed in the web
of the frame'member and the bottom of the gear box
opposite end of the clevis member is threaded onto the
and is journalled for rotation in the collar member 215
outer end of the piston rod 177 to adjustably vary the
‘which is secured at its upper end to the lower end of the
effective length of said rod, the other end of the piston
transverse partition 216 located in the gear box. A beveled
rod being connected to a piston 178B located in cylinder
178. The far end of the cylinder has 'a clevised bracket 55 gear 226 is keyed to the shaft 43 above the aforementioned
collar. A beveled gear 225 is secured on the transversely
179 connected thereto. A pivot bracket 180 is secured
extending
stud shaft 219 in driving engagement with the
to the vertical brace 33 and at the other end is pivotally
beveled gear 226 by a set screw 227, said stud shaft being
secured in the clevised end of the clevis member 179 by
the pivot 181.
An elongated switch support bracket 185 is bolted by 60
cap screws 192 to each of the cylinder end blocks 178A
to depend therefrom (see FIGURE 7). The support
bracket has a spaced pair of depending ears 187, 188 that
lie generally in a plane that passes parallel to the central
jo-urnalled for rotation in the bearing members 222, 223
which are mounted in the gear box side walls 228, 213,
respectively.
Fixedly secured to the inner end of the respective shafts
is one end of a universal joint 2'29, 230. The opposite end
of the universal joint 230 is ?xedly connected to a splined
shaft 232 which in turn is slidably retained within one end
axis of the cylinder 178. A return limit switch 189 is
65 of the splined sleeve 233. The opposite end of the splined
secured to the ‘front ear 187 by cap screws 191 while the
sleeve 233 is ?xedly secured to the opposite end of the
forward limit switch 190 is similarly secured to the back
universal
joint 229. A bellows 231 ‘is mounted to have
ear 188, said back ear including a right angular vertically
one end ?xedly secured to the universal joint 230 and to
extending ?ange 193 formed integral therewith. An aper
ture 194 is formed in the ?ange 193 to have one end of the
switch rod 195 slidably mounted therein, the opposite end
of switch rod being pivotally secured to the lower end
of the pivot bolt 182. The aperture 194 is located to have
the switch rod extend parallel to, the central ‘axis of the
cylinder 17 8.
have the opposite end thereof ?xedly clamped onto the
70 splined sleeve. The aforementioned universal joints, stud
shafts, sleeve, shaft and beveled gearing form a driving
connection between the right hand drive shaft and the left
hand drive shaft for driving the side belts in synchronism.
The outer end of the tube 236 is secured to the front
75 wall 244 of the gear box 212 by a bracket member 235.
3,051,297‘
9
1@
The inner end of‘ the tube 236 is slidably mounted in the
inner end of the tube 237, the opposite end of tube 237
line 316‘ to the third port of the master control valve. The
fourth port of the master control valve is connected via
line 311 to the air exhaust 312.
Referring to FIGURE 12, the electric circuitry, gener
being secured to the front wall of the gear box by a bnacket
member 235. The ‘aforementioned tubes 236, 237 ‘are
mounted at an elevation slightly below the top elevation
ally designated 315, for controlling the operation of the
of the bag 9 when the bag support is positioned at the
proper elevation.
master control valve include-s main lines L1, L2 which are
connected to one end to a power supply unit (not shown).
Secured to each of the uprights 29' is a transversely in
The opposite end of the main line L1 is connected to
wardly extending panel 249 having a rearwardly extend
junction 316 which in turn is connected via line 317
ing ?ange 24-1 formed integrally therewith. Each of the 10 to the terminal 318 of the bag feeder switch 330 located
?anges 241 is spaced transversely outwardly from the ad
in the gear box 212. The normally open push button
jacent frame member a smaller distance than the trans
331 is connected to the terminal 318 to engage contact
verse width of a blade 54. The elevation of the lower
319 when said push button is moved to a closed position.
edge of each of the panels 249 is higher than the top of
The contact 319 is connected to terminal 320‘ which in
the bag support at its most elevated position so as to 15 turn is connected via line 321 to the junction 322. The
provide space for the outwardly extending bag bottom
line 329 connects junction 322 to the terminal 328 of
closure strip 9A to project into.
bag feeler switch 332 which is located in the gear box
A generally U-shaped bag retainer member 242 is
211, said terminal being connected to contact 327. Con
secured to each of the panel members to have the web
nected to the terminal 326 of the switch 332 is a normally
portions 242A thereof extend transversely inwardly from
open push button 263 which is mounted to engage the
the adjacent front panel. The legs 242B of the retainer
switch contact 327. The terminal 326 in turn is con
member are secured to the front panel by brackets 243.
nected via line 325 to junction 316. The aforegoing
The web portions 242A, the vertical extending portion
electrical connections connect the bag feeler switch 332
of the stop 128 and the tubes 236, 237 each have a back
in parallel with the bag feeler switch 330.
surface that substantially lies in the plane of the feed line
Junction 322 is connected via line 336 to the terminal
F—F.
337 of the return limit switch 190. The push button 203,
Pivotally mounted in the rectangular slots 245 formed
which is resiliently urged to an open position, is con
in the inner edge of the front panels to extend transversely
nected to the terminal 340 to engage the contact 338 which
inwardly therefrom are the outer ends 250A of the bag
is connected to the terminal 337. Terminal 337 is con
feeler arms 258 of the bag feeler switches 330, 332.
30 nected to the terminal 345 of the forward drive switch
Each outer end 2541A is connected by a vertical offset
189 by line 341. The terminal 346 is connected to push
25513 to one end of a transversely extending horizontal
button 208 which is mounted to engage contact 344 which
portion 250C of a bag feeler arm. The opposite end of a
in turn is connected to the terminal 345, said push button
horizontal portion is keyed to the lower end of a pivot bolt
being resiliently urged to an open position.
251. Each pivot bolt extends upwardly through a frame 35
The main line L2 is connected to a terminal 347. The
member 31 and a collar 252 which is secured to- the front
solenoid coil 350 of the master control valve is connected
wall 244 of a gear box. The upper end of each pivot
across terminals 340, 347 while the solenoid coil 351 is
bolt ‘has a switch actuator 258 keyed thereto.
connected across terminals 346 and 347. When the
The switch actuator includes a radially extending
‘solenoid coil 351 is energized, the valve member in the
spring arm 253 that extends inwardly from the pivot bolt 40 master control valve is moved to make the ?uid connec
in the same direction as the horizontal portion of the bag
tions illustrated in FIGURE 123 for applying air through
feeler arm. One end of the spring 254 is connected to
ports 301, 308 of cylinders 178, 164 respectively, and to
the outer end of the spring arm and the opposite end is
remain in the aforementioned position until the solenoid
secured to the head end of the transversely extending
coil 350 is energized. When the solenoid coil 350 is
cap screw 255. The cap screw in turn is threaded into
energized, the valve member moves to a position to make
the offset 257 and locked in an adjusted position by a lock 45 the ?uid connections illustrated in FIGURE 12A and to
nut 255, said offset being formed integral with the parti~
remain in that position until the solenoid coil 351 is
again energized. By providing a valve member which
The switch actuator 258 also includes an arm 260 ex
remains in a given position until the appropriate solenoid
tending radially outwardly from the pivot bolt 251 on the 50 coil is energized to move said member to a second position,
opposite side thereof from the spring arm. A longitu
even though the bag magazine is stopped with the switch
dinally extending cap screw 261 is threaded into the outer
plate 260 and cap screws thereon located intermediate
end of the arm 268 and is locked in an adjusted position
the positions for pushing one of the other of the push
by a lock nut 262. A micro-switch 264» is positioned out
buttons of the limit switches 189‘, 199 to a closed position,
wardly from the opposite side of the offset 257 from the 55 upon starting the bag magazine, either the line 286 or 310
cap screw 255 by a spacer 265, said spacer and micro
is ?uidly connected to the air supply ‘and as a result the
switch being secured to the offset by screws 266. The
piston rods and pistons of each of the cylinders will be
micro-switch has a push button 263 resiliently urged to an
moved to bring one of the cap screws mounted on the
open position, said push button being located in a posi
plate 200 into engagement with the appropriate push
tion to be engaged by the head end of the cap screw 261
60 button.
for moving said push button to a closed position.
It is usually desirable to connect the main line leads
The air circuitry, generally designated 275, includes an
L1, L2 to a master control switch which also controls
air supply 276 connected by line 277 to the first port of
the operation of the automatic bag feeding mechanism with
the solenoid operated four-way master control valve 280
which the bag magazine is used. Further it is preferable to
(see FIGURE 12A) . The second port of the control valve
65 provide appropriate switch in the main line circuit that will
is connected by line 286 to a ?uid junction 288 located in
turn off the bag magazine in the event that the pick up
the air manifold 287. The junction 288 is connected via
arm assembly does not pick up the bag.
line 298 to the forward port 331 of the forward pusher
The structure of the bag magazine of this invention
drive cylinder 178. The rear port 380, which is located
having been described, a brief operation thereof will now
on the opposite end of the cylinder, is connected via line
70 be set forth. For purposes of facilitating the description
299 to the junction 289 which is also located in the air
of the operation, it will be assumed that the bag support
manifold. A line 306 also connects junction 288 to the
and conveyor assembly 25 1s
a at a lower elevation
n
and the
forward port 388 of the bottom belt drive cylinder 164-.
side assemblies are transversely spaced apart a greater
The rear port 369 of the cylinder 164 is connected by line
distance than desired for properly ‘holding the size of bags
397 to the junction 289 which in turn is connected via 75 being fed to the automatic bag feeding machine. In order
tion 216 to extend at right angles thereto.
3,051,297
1l
1.2
to elevate the forward end of the bag support assembly,
pushbutton 263 or both pushbuttons moving to a closed
position, an electrical connection is established from junc
the hand wheel 148 is turned in the direction to move
collar 123 along shaft 139 in the direction of the arrow
151 and thereby cause the crank arm, the crank shaft, and
the -'U-shaped bracket to rotate in the direction of the
arrow 159 to elevate the front end of the bag support and
conveyor assembly. To elevate the rear end of the as
[tion 316 through junction 322 to junctions 337, 345.
Now for purposes of explanation, assume that when the
magazine was stopped, the last solenoid coil to be ener
gized was coil 351. As soon as the air supply is turned on
to supply air to line 277, air will be supplied through line
286 to port 301 of cylinder 17% and port 398 of cylinder
164. By applying air through the ports 301, 308 the re
shaft is raised to a height to position the rear end of the
bag support at the same elevation as the forward end and 10 spective pistons are moved to a retracted position which
will cause the overrunning clutches to rotate the respective
then the bolt as again tightened. When the bag support
shafts in the direction of arrows 358, 127 respectively to
and conveyor assembly have been adjusted to the proper
sembly, the clamp bolt £197 is loosened and the elevating
height, the bags 9 on the support surface extend to a
drive the side belts and the bottom belt in a forward
direction (arrow 355). At the same time as the piston rod
slightly higher elevation than that of the bag retaining
tubes 236, 237. Now the stop 12% is adjustably positioned 15 177 is retracted (arrow 360) the switch rod and connector
surface of the U-shaped bag retainer webs 242A and the
plate 2% mounted thereon arermoved in the sme direc
tion. The aforementioned movement of the plate 20%
brings the head end of the cap screw 291 into engagement
bag retaining tubes 236, 237.
In order to properly position the side assemblies, the
with the push button 2&3 to move it to a closed position
to make contact with the terminal 338 and thereby ener
hand Wheel 97 is turned in an appropriate direction to
move said side assemblies inwardly towards the longitudi
nal axis L—L until the transverse distance between the
make the ?uid connections illustrated in FIGURE 12A
on the bag support so that the vertical surface thereof
"will be located in substantially the same plane as the
straight line portions 62B is only slightly greater than the
width W of the bags 9 being fed by the bag magazine. In
the event only one of the said assemblies is to be moved
relative to the longitudinal axis L—L, the appropriate
clamp bolt 87 is loosened and then the appropriate adjust
ments are made as have been described heretofore.
Independent drives (which are made up of an air cylin
der, an overrunning clutch, and associated members) con
trol the side belts and bottom belts and are simultaneously
driven in the same direction since they are operated from
the same solenoid control valve. As a result even though
gize solenoid coil 35%. Energizing solenoid coil 350 will
cause the valve member to be moved to the position to
whereby the air supply 27a is ?uidly connected through
junction 2.89 to the port 3% of cylinder 178 md port 3%?
of cylinder 164. As a result the piston rods 177 , 162 are
moved in an outward direction (arrow 359) and thereby
cause the clutch ‘arms 126, 175 to rotate on the respective
shafts.
However, the aforementioned rotational move
ment ‘of the clutch arms does not rotate shafts 42, 117
since the clutch arms through the overrunning clutch outer
races only drivingly engage the \overrunning clutch inner
races to rotate the shaft in the direction or" the arrows 358,
127 respectively. As a result of the clutch arm 175 being
the side assemblies and/ or the bag support assembly is set 35 rotated in the direction opposite the arrow 358, the cap
screw 291 is moved out of engagement with the push but
in a different position, the drives do not have to be read
ton 263 whereupon the electrical connection between ter
justed to advance the respective belts the previously set
minals 337 and 340 is broken and coil 35!} is de-energized.
increment of forward motion since the drives are carried
But, since the valve member remains in position, the piston
by the respective assemblies.
rod
continues to move outwardly until it engages push but
When a smaller width bag is to be fed by the bag maga
ton 32:’: and moves it to a closed position to electrically
zine, side guides 62 are positioned inwardly a greater dis
connect terminals 345, 346 and thereby energizes solenoid
tance relative to the respective frame ‘member 31 than if
coil 3521. Upon energizing solenoid coil 351, the valve
a larger width bag is to be fed by the bag magazine. As
member is moved to again make the ?uid connections as
a result a greater width portion of a larger bag is supported
illustrated in FIGURE 123.
to have a forward force applied thereto than in the case
As may be apparent from the aforegoing description, the
of a smaller bag.
length of the piston stroke and thereby the increment of
It is to be noted that preferably the air vmanifold is
“forward feed” of the bags is controlled by properly
mounted on one of the side assemblies, and that the lines
threading the cap screw 19% into the cylinder 178. That is,
connecting said manifold to the respective drive cylinders
the amount of forward movement of the side and bottom
are of su?icient length and made of ?exible material so
‘as not to interfere with readily adjusting the side assemblies
and the bag support and ‘conveyor assemblies and the
bag support and conveyor assembly for the size of bags
being “fed.” Once the side assemblies and the bag sup
port conveyor mechanism are properly adjusted, the bag
magazine is ready for operation and a workman may stack
bags onto the back end of the bag magazine, said magazine
in turn will then automatically move the bags to feed
lines F—-F once the magazine control circuits have been
energized. ‘It is to be noted that since each increment of
movement of the belts is usually 5-6 bag thicknesses and
the pusher slats at the back end of the magazine are
spread apart so'that a workman may easily place a “lot” of
bags on the magazine when the magazine is advancing
bags with no danger of the workman being injured.
In theevent that there are no bags at the forward end
of the magazine, the spring 254 will have pivoted the ac
tuator 258 about the pivot shaft 251 in the direction of
belts per cycle may be readily adjusted to the desired in
crement of forward movement. Usually it is found desir
able to set the length of the piston strokes so that the bot
tom and side belts are moved to advance said belts about
?ve or six bag thicknesses per cycle of operation of the
pistons.
Occasionally it may be desirable to have the amount of
forward movement of the side belts per cycle different
than the corresponding movement of the bottom belts. In
such an event a cap screw may be mounted in the cylinder
164 in the same manner as cap screw 198 is mounted in
cylinder 17:‘; and the length of piston stroke accordingly
adjusted.
The bags are automatically inched forward by the op
eration of the cylinders 164, 178 and associated mecha
' nism moving the bottom and side belts in the forward
direction (arrow 355). The forwardmost bag abutting
against the outer ends of the feeler arms 250 will force the
feeler arms to rotate in ‘a direction (right arm in the direc
the arrow 356 to move the cap screw 261 out of engage
tion of arrow 362, FIGURE 10) against the spring tension
ment with the push button 263 and thereby permit the 70 of spring 254. The continuing advancement of the bags
normally closed push button 263 to move to a closed posi
will cause the feeler arms to rotate a suficient amount to
tion. Push button 331 similarly is moved to a closed
moverthe cap screw 261 into engagement with the push
position‘if bags 9 do not exert su?icient pressure against
button 253 to move said push button to an open position.
the bag feeler arm on the left side assembly to offset the
Likewise the left feeler arm will move the push button 331
spring tension. As a result of either pushbutton 3311, or 75 to an open position. At this point it is to be noted that a
3,051,297‘
13
14
circuit is provided for alternately energizing the solenoid
trated in FIGURE 13, means are provided for roughly
aligning the bags at the rearward end of the magazine.
coils 350, 351 as long as one of the feeler arms does not
have sufficient bag pressure exerted thereon to “open” the
push button (263, 331) control thereby. As soon as both
of the push buttons 331, 2-’ 3 have been moved to an open
mately one-half the length of the machine, the forward
end of each rear side guide underlaying the back end
position, the circuit for energizing coils 350, 351 is opened
portion of a front side guide.
and ,air will thereafter be continuously applied to one side
of the cylinders 164, 178 until at least one of the bag
feeler switch push buttons is permitted to move to a closed
position due to the bag pressure against the bag feeler am
being less than the effective spring tension of spring 254
As may be noted by referring to FIGURE 2, each
of the idler shafts is located more closely adjacent the
longitudinal axis L—L than the drive shaft 43. Thus the
corresponding forward advancing pockets on each belt
are spaced further apart at the front end of the maga
zine than at the portion of the magazine adjacent the
idler shafts. The aforementioned spacing of the pockets
permits the blades to start their withdrawal from between
The rear side guides are of a length to extend approxi
on said arm. The two bag feeler switches are provided,
one on either transverse side of the bag, since in the event
both sides of the bags are not advanced evenly, one bag
v 7
feeler switch will be open and the cylinders will continue 15 the bags prior to said blades being adjacent the drive
shaft.
The back surface of the outer ends 250A of the bag
The blades start to retract from between the bags as
to operate to advance the belts.
feeler arms are located in the same plane as the back
surface of the tubes 236, 237 when said arms have moved
the pushbuttons of the bag feeler switches to a closed
position. Providing a bag feeler switch on either side as
sembly insures that the bags are maintained ?at ‘and com
pressed at the feed line. It has been found that if only a
switch is provided on one side assembly there is present
the problem that after a few bags have been removed from
the feed line end of the magazine, a “loose” bag or bags
will exert sufficient pressure against a bag feeler arm to
close the respective switch and thus actuate the belt drives
before the usual number of bags have ‘been removed from
the magazine.
soon as the respective blades are advanced past the verti
cal axis of the adjacent idler shafts. However, the
greater part of the retracting movement of the blades oc
curs when the respective blades are adjacent the drive
shafts. For example, in a bag magazine properly ad
justed and having blades of approximately 3" in width,
the drive shaft vertical axis approximately 51/2" from
the feed line, and the idler shaft 15" from the feed line,
the major portion of the retracting movement of the
blades starts to occur 8" to 10" from the feed line and
is completed 6" from the feed line. As a result, the bags
at the front end of the magazine are uniformly com
pressed. In the event that one set of advancing pockets
had not been ?lled with bags, sufficient pressure would
However by providing two bag feeler
switches, one on each side assembly, this problem is over—
come since the second switch remains open until the bags
in the magazines have been advanced to close the second
not be exerted against the feeler arms and as a result
the magazine controls would keep the bag conveyor ap
paratus in operation until su?icient pressure by the bags
switch, it being extremely infrequent that a loose bag
would close both switches. With only one switch the op 35
was built up behind said feeler arms. Thus any “gap”
eration of the belt drives is not as uniform as it is with
in the bags on the magazine ahead of the idler shafts
two switches and, as a result the bags are not as uniformly
would be ?lled.
_
kept under compression with one bag feeler switch.
The wider separation of the pockets at the ‘back end
It is to be noted that the bag pickup arm removing
as they round the rear shafts of the magazine makes
a bag from a bag magazine tends to force the bag feeler
it
easier for an operator to load a lot of bags in the sup
arm to rotate in a direction to move the respective cap
port assembly without danger of injury as previously set
screws 261 to hold the bag feeler switches in an open
forth. At the back end of the magazine the bags are
position. However, once a su?’icient number of bags
loosely conveyed, however, by properly setting the front
have been removed from the forward end of the bag
magazine, the pressure exerted by the remaining bags 46 side ‘guides 62 and the center bag guides 58 as the bags
are advanced past said front and center side guides, the
against the feeler arm 250 will be decreased and as a
converging g_ ide portions 62C, 58A force the bags into
result the springs 254 rotate the switch actuators a su?i
cient amount to permit one or both of the pushbuttons
263, 331 to move to a “closed” position to provide a
alignment.
The pusher ‘slats at the front of the maga
zine in conjunction with the members 120, 242, 235,
and 237 ‘compress the bags located therebetween, the
circuit whereby the solenoid coils 350, 351 are alter
nately energized as previously described. Alternately en 50 aforementioned structure holding the bags ?at and com
‘pressed so that a, single, bag may be removed by the
.ergizing coils 350, 351 will apply air to the opposite
suction cup on the bag pickup assembly.
‘
sides of the cylinder piston 178, 164 until the bags on
‘The tubes 2376, 237 at the front of the magazine
the magazine have been moved in a forward direction
“break” the bag being removed by assembly 13 so that
a su?icient amount to build up the bag pressure against
the bag feeler arms to move said arms to close both of
the bag feeler switches.
The operator may place additional bags on the back
end of the bag magazine as needed. Normally the bags
come in bales of 100 with the open ends of each lot of
25 being set in opposite directions.
Since the longi
tudinal width of each pocket is the same size as the
thickness of the 25 bags, it is convenient for the op
erator to pick up a lot of 25 and stack the lot on the
55
it will be ‘properlylpositiojned to be grippingly engaged
by assembly 14. That is if tubes 236, 237 were not pro
vided and double gusset bags are being used, freequently
the sidewalls of such a bag will pull apart as the bag‘is
being removed from the magazine and as a result the
60 second gusset will be caught by assembly 14 as it moves
toward the longitudinal axis of the bag magazine. I-Iow—
‘ever by providing tubes 236, 237, the top of a bag being
removed is momentarily held back with respect to the
center portion of said bag and thus holds the gussets to—
magazine. Although it is desirable that a “lot” of bags
65 gether.
be placed in each “set” of pockets (one pocket on each
As many wideliy apparently different embodiments of
belt) right after the set of pockets has “rounded” shafts
this
invention may be made without departing from the
48, it will become apparent hereinafter that the bag maga
spirit
and scope thereof, it is to be understood that we
zine will function properly even if some of the pockets
dov not limit ourselves to the speci?c embodiments herein.
that are being advanced are not ?lled. Each set of pock
What we claim is:
'ets will hold a “lot” of bags in an upright position and
1. In a bag magazine for advancing a group of bags
move a “lot” to the forward end of the bag magazine.
from a loading station to a feed line whereat the bags
After one or more lots of bags have been positioned
are mechanically removed one at a time from said maga
on the bag support and in the respective pockets, by ro
zine, comprising a base, elongated bag support and con
tating the side guides to a dotted line position as illus 75 veyor means mounted on the base for advancing bags
s,e51,297
l5
ltd
from said loading station to said feed line, said aforemen
line, the ?rst mentioned means including a longitudinally
extending bag bottom support assembly mounted on the
tioned means including at least one endless belt and
means including a ?rst drive shaft for rotatably mount
base, a side frame mounted on each transverse side of the
ing said endless belt, a single ?rst two way acting piston
cylinder combination having a piston rod, means for
drivingly connecting said piston cylinder combination to
the ?rst drive shaft for rotating said shaft in only one
direction, a ?uid supply line connected to either end of
said cylinder, pressurized ?uid supply means, control
bag bottom support assembly, and means mounted on the
side frames and cooperating with the bag advancing
means at the forward end thereof for releasably holding
bags at the feed line under compression to be mechani
cally removed one at a time from the bag magazine, the
last mentioned means including a bag top engaging mem
valve means connected to the ?uid supply means and to 10 ber mounted at a lower elevation than the top edge of a
bag positioned on the bag support.
the opposite ends of the ?uid supply lines for supplying
7. A bag magazine having a longitudinal axis for au
?uid under pressure alternately to each of the supply
tomatically advancing bags from a loading station to a
lines, and control operator means for actuating the con
trol valve means to supply ?uid to the other supply line,
feed line, comprising a base, and side and bottom con~
said control operator means including a power supply, 15 veyor means mounted on said base for conveying the bags
circuitry connecting said power supply to the valve means,
from the loading station to said feed line, said bag con
veyor means including a side frame on either transverse
and switch means connected in said circuitry for control
side of the longitudinal axis, elongating means for sup
ling the supply of power to the valve means.
porting the bottoms of the bags, means mounted on the
2. The apparatus of claim 1 further characterized in
that bag feeder means is mounted on the conveyor means 20
base for adjustably varying the elevation of the elongated
adjacent the feed line and is connected in said circuitry
means relative to the base and retaining the elongated
means in the adjusted position, the last mentioned means
including a bracket having one end rotatably secured to
the base and an opposite end in supporting engagement
in series with the switch means for sensing an insuf?cient
supply of bags adjacent the feed line, and alternately
opening the circuitry connection when a sufficient supply
of bags is located adjacent the feed line and closing a cir 25 with the elongating means, a crank arm having one end
cuit connection when an insufficient supply of bags is ad—
connected to the rotatably mounted end of said bracket
jacent the feed line.
for rotating said bracket, means connected to the oppo
3. In a bag magazine for advancing a group of bags
site end of the crank arm for moving said crank arm to
from a loading station to a feed line whereat the bags are
rotate said bracket and thereby change the elevation of
mechanically removed one at a time from said magazine 30 said elongated means, an elevating shaft pivotally se
comprising a base, bag bottom support and conveyor
cured to elongated means in horizontally spaced relation
means mounted on the base for conveying bags to said
to said bracket and a clamp mounted on said base for
feed line, a side assembly mounted on either side of the
holding said elevating shaft in various adjusted elevated
bag support and conveyor means and extending above
positions and means for driving the bag support conveyor
said conveyor means for aligning the bags as the bags are 35 means to advance bags from the loading station to the
moved toward the feed line, means mounted on the side
feed line.
8. A bag magazine having longitudinally extending axis
comprising a 'base, elongated longitudinally extending
assemblies at the feed line for releasably retaining a bag
at the feed line in position to be mechanically removed
in a forward direction from the bag magazine, means for
means mounted on said base for supporting the bags in
an elevated position relative to said base, said bag support
means including a bag support having a front end por
driving the conveyor means, and means for controlling
the drive means, said control means including bag feeler
meausfor alternately actuating the drive means to ad
vance bags to be pressed against the retaining means and
stopping the drive means, said retaining means including
tion and a back end portion, a side frame mounted on
either side of said bag support, means mounted on each
of said side frames for retaining a group of bags in an
an elongated member for abuttingly engaging the front
upright position and moving the group of bags from said
45 back end portion to said front end portion of the bag
top portion of the foremost bag at the feed line.
4. The apparatus of claim 3 further characterized in
that there is provided means for slideably mounting the
support, each of said last mentioned means including a
first vertical shaft mounted on the frame adjacent to and
side assemblies in a transverse direction relative to the
conveyor means and that the elongated member includes
rearwardly of said front end portion, a second vertical
shaft mounted on said side frame adjacent said back end
50 portion, an endless belt extending around each of said ?rst
a pair of telescoped tubes having their outer ends at
tached to the respective side assemblies.
5. A bag magazine for advancing bags from a loading
station to a feed line and having a longitudinal axis com
prising a base, a pair of spaced, vertical, longitudinally
extending side frames slidably mounted on said base for
and second shafts and means on each of said shafts for
mounting said endless belt each on said shaft-s, said end
less belts including spaced vertical blades mounted to ex
tend transversely inwardly toward the opposite side frame
on the inner run of the belt for abuttingly engaging at
transverse adjustment, an endless side belt mounted on
least a portion of the sidewalls of the {adjacent bags, means
each of said side framesto extend generally the longi
connected to at least one shaft on each side frame for
tudinal length of the respective side frames, a longitudi
simultaneously driving said means on the side frames in
nally extending bag support conveyor assembly mounted
synchronism, and means mounted on the bag support
intermediate the side frames, said assembly including a 60 means at the forward end of the bag support to engage
bag support and an, endless bottom belt mounted on said
bag sidewalls for releasably retaining bags at the forward
bag support, means mounted on the base for adjustably
end of the bag support for forward withdrawal.
varying the elevation of said bag support conveyor as-.
sembly relative to the elevation of the side belts and the
base and retaining said assembly in the adjusted position,
65
9. A bag magazine having a longitudinally extending
axis comprising a base, elongated longitudinally extending
means mounted on said base for supporting said bags in
an elevated position relative to said base, said bag sup
port means having a front end portion and a back end
line.
portion, a side frame mounted on either sideof said bag
6. A' bag magazine for advancing a group of bags from
the back end of the magazine to a feed line at the for 70 support, means mounted on each of said side frames for
retaining a group of bags in an upright position and mov
ward end whereat bags are mechanically removed one at
means for simultaneously driving said side and bottom
belts to advance bags from the loading station to the feed
a time from said magazine comprising a base, elongated
bag support and conveyor means mountedvon the base
'foradvancing bags to the feed line, and means for driv
‘ing the conveyor'means to advance the bags to the feed 75
ing the group of bags from said back end portion to the
front end portion of the bag support, means for simultane
ously driving said means on the side frame in synchro
nism, and ‘control means for alternately actuating the
3,051,297
17*
18
drive means to maintain a supply of bags to the forward
end of the magazine and stopping said drive means upon
the bags being moved to said forward end of the bag mag
azine, said control means including a bag feeler arm
front end of the side frame for- mounting the forward
course of the side belt, and means intermediate the front
and back ‘belt mounting means for holding the intermedi
ate course of the side belt in position to diverge from the
longitudinal axis in a direction toward the front belt
mounting means.
:13. A bag magazine having a longitudinal axis com
mounted oneach side frame to be engaged by the fore
most bag on the bag magazine and circuit means operated
by the feeler arms for permitting one feeler arm to» actu
ate the drive means independent of the other bag feeler
prising a base, an elongated generally horizontal, longi
tudinally extending bag support mounted in vertical
spaced relationship to said base, said ‘bag support having
arm.
10. A bag magazine having a longitudinal axis for auto
matically advancing bags from a loading station to a feed
a front end portion and a back end portion, means
line comprising 1a base, means mounted on said base for
mounted on the base for vadjustably varying the elevation
supportingly conveying a plurality of bags toward the feed
of the bag support and retaining the bag support in the
line, the aforementioned ‘means including longitudinally
adjusted position, an endless bottom belt mounted on
extending means for supporting bags at the bottom por 15 the bag support engageable with the bag bottoms for
tions in spaced relation to the base, a longitudinal side
conveying bags from the ‘back end portion to the front end
frame ‘on either transverse side of the last mentioned
means, and guide means mounted on each side frame at
portion, ?rst means mounted on the ‘bag support for
movement therewith for driving said bottom belt, a side
a higher elevation than the bag bottom support means and
adjacent the loading station for roughly aligning the bags
frame slidably mounted on the base on either transverse
positioned on the bag bottom support means, each of
side of the bag support, means for transversely adjustably
positioning the side frames relative the longitudinal axis,
said guide means including a side guide and means se
and endless belt means on each side frame to engage the
20
cured to the respective side frame for mounting the side
respective edge portions of the ‘bags positioned on said bag
guide for pivotal movement about a horizontal axis be
support, second means mounted on the side frames to
tween a position in spaced relation to a plurality of bags 25 drive each side belt means in the various transversely ad
and a second position in abutting engagement with said
justed positions for advancing the bags toward said for
plurality of bags for forcing said bags into alignment, and
means ‘connected to the bag support conveyor means to
drive said conveyor means to advance bags from the load
ing station to the feed line.
11. A bag magazine for advancing bags from a loading
ward end portions and third means connected to the ?rst
and second drive means for operating each of said ?rst
and second drive means.
14. The structure of claim 13 further characterized in
that the ?rst drive means includes a piston cylinder com
bination and ‘means for drivingly connecting the afore
prising a base, ‘bag bottom support and conveyor means
mentioned piston cylinder combination to the bottom belt,
mounted on the base for conveying bags toward the feed
that the second piston cylinder drive means includes a
line, a side frame mounted on either side of the bag 35 side belt drive piston cylinder combination is mounted
bottom support means to extend vertically thereabove, an
on the one of the side frames for movement therewith
and means drivingly connecting the last mentioned com
endless side belt on each side frame, ?rst belt shaft means
mounted on each side frame adjacent the feed line for
bination to the side belt, that means are mounted on the
having the front I'UH portion of the belt extended there
forward end of each side frame for retaining bags under
compression and in condition to be mechanically removed
around, second belt shaft means mounted ‘on each side
frame ‘adjacent the loading station for having the rear
from the front end portion, that said third means in
cludes means for supplying ?uid to each of the cylinders,
run portion of a belt extended therearound, said ?rst belt
shaft mounting means being mounted on the side frame
said ?uid supply means including a manifold, separate
for positioning the inner forward run portion of the re
?exible ?uid lines extending from the manifold to each
spective belt further from the longitudinal axis than the 45 end of each cylinder and connected to the respective ends
second shaft means positions the rearward run portion,
‘of the cylinders to simultaneously supply ?uid to the
means mounted on each side frame for retaining the inner
corresponding ends of said cylinders andto exhaust the
intermediate run portion of the respective belt more close
opposite ends of the cylinders, and control means con
ly adjacent the longitudinal axis than the front run portion
nected to the ?uid supply means for alternately connect
and means for driving said endless belts.
50 ing the ?uid supply through the ?uid lines to opposite
12. A bag magazine having a longitudinal axis com
ends of the cylinder and means at the forward end of the
prising a base, longitudinally extending bag support means
bag magazine connected to the control means for sens
station to a feed line and having a longitudinal axis com
having a forward end and a back end mounted on said
ing an insu?icient supply of bags and thereupon operating
frame for supporting empty bags at their bottoms, a pair
said control means in the aforementioned manner and
of endless side conveyor means for moving a plurality of 55 upon sensing a su?icien-t supply of bags at the forward
empty bags along the bag support means and retaining
end, discontinue operation of the control means in the
said bags in a vertical condition as they are moved for
aforementioned manner.
wardly along the bag support means, there being a side
conveyor means mounted on each transverse side of the
bag support means to extend vertically above said bag sup
15. A bag magazine having a longitudinal axis com
prising a base, elongated means mounted on said base
60 for supporting a plurality of bags in spaced relation to said
port means, each of said ‘side conveyor means including a
side frame having a front portion and a back end portion
and an endless belt mounted on the side frame, each of
base, said elongated means having a front end portion
said belts having a plurality of horizontally spaced trans
portion, and means connected to said advancing means
and a back end portion and ‘including means for advanc
ing the bags from the back end portion to the front end
versely extending pusher members for abutting against the 65 to drive said advancing means, said advancing means
side walls of the bags to retain a group of bags between
each adjacent pair of pusher members in a vertical up
right ‘condition as the bags are moved along the bag sup
including a drive shaft, means connected to said shaft
for driving said shaft, said drive means including a piston
cylinder combination, an overrunning clutch mounted on
said drive shaft for transmitting only a one way drive
frames forwardly of the forwardmost portion of the belts 70 force to said shaft, means connected to the overrunning
clutch for transmitting a driving force from the piston
for releasably holding the foremost bag against forward
cylinder combination to the overrunning clutch and means
movement, and means for driving said side belts in syn
for operating the piston cylinder combination.
chronism, each of the side belt conveyor means including
16. A bag magazine having a longitudinal axis com
means on the back end of the respective side frame for
mounting the rear course of the side belt, means on the 75 prising a base, elongated means mounted on said base
port means, means mounted on the front ends of the side
3,051,297
.
199
r
compressed at forward end of magazine until removed.
18'. A bag magazine having a longitudinal axis com
prising a base, longitudinally extending bottom conveyor
for supporting a plurality of bags in spaced relation to said
base, said elongated means having a front end portion and
a back end portion and including means for conveying
bags from the back end portion to the front end portion,
and means for driving said conveying means, said drive
means having a forward end portion and a back end por
tion mounted on said base for supporting empty bags at
their bottom, said bottom conveyor means including a
means including a drive shaft, means connected to said
horizontally extending bag support member and means
on said support member for supportingly moving bags
shaft for driving said shaft, said ‘shaft drive means in
cluding motor means, an overrunning clutch having an
outer race and an inner race drivingly connected to said
in a forward direction, a pair of endless side conveyor
drive shaft for transmitting only a one way driving force 10I
means for cooperating with the bottom conveyor means
for moving the bags in a forward direction and retain
ing said bags in a vertical condition as the bags are moved
forwardly, there being a side conveyor means mounted
to the overrunning clutch, and means connected ‘to the
on each transverse side of the bag support means to
motor means including a clutch arm rotatably mounted
on the drive shaft in driving engagement with the outer 15 extend vertically above said bottom conveyor means,
each of said side conveyor means including a side frame
race, said motor means including a piston cylinder com
having a back end portion and a front end portion and
bination having a piston and a piston rod connected to
an endless belt mounted on the side ?ame, each of the
said piston, said piston rod being pivotally connected to
side conveyor belts having a plurality of horizontally
the outer end of said clutch arm, and means connected to
to said shaft and means connected to the motor means
for transmitting a driving force from the motor means
said piston cylinder combination for operating said piston. 20 extending pusher members for abutting ‘against the ad
jacent side walls of the bags and retaining a group of
17. A bag magazine having a longitudinal axis com
bags between each adjacent pair of pusher members in
prising a base, longitudinal extending bag support means
a vertical upright condition as the bags are moved in a
having a forward end and a back end mounted on said
base for supporting empty bags at their bottoms, a pair
forward direction, means mounted at the front end of the
of empty bags along the bag support means and retaining
said belts for releasably holding the forward most bag
against forward movement, means for driving said side
of endless side conveyor means for moving a plurality 25 side frame forwardly of the forward most portions of
said bags in a vertical condition as said bags are moved
along the bag support means, there being a side conveyor
belts and the means on said support member, ?rst bag
feeler means mounted at the forward end of one of said
' means mounted ‘on each transverse side of the bag sup
port means to extend vertically above said .bag sup 30 conveyor means for engaging the foremost bag, means for
actuating the drive means when the bag pressure against
port means, each of said side conveyor means including a
said ?rst feeler means falls below a predetermined value,
second bag feeler means mounted on another conveyor
‘side frame having a front end-anda back end and an end
less belt mounted on the side frame, each of said side
belts having a plurality of horizontally spaced transverse
ly extending vertical pusher members forabutting against
means for engaging the foremost bag in spaced relation
35 to the ?rst feeler means, and means for actuating the
the side walls of the bag to retain a group of bags be
tween each adjacent pair of pusher members in vertical
drive means independently of the ?rst feeler switch actu
ating means when the bag pressure against said second
feeler means falls below a predetermined value.
upright condition as they are moved valong the bag sup—
port means, means for driving said belt in synchronism, a
References Cited in the ?le of this patent
stop adjustably mounted on the forward end of the ‘bag 40
support means for engaging a small portion of the bag
UNITED STATES PATENTS
side wall,_a bag retainer member mounted on each side .
frame to extend inwardly toward the longitudinal axis,
and bag top engaging means mounted on the sideframe
to extend between said side frames, said stop, bag retainer 45
members and bag engaging member being positionable
to have a back surface in a common vertical plane and
spaced forwardly of the endless belts a substantially
greater distance than transverse width of the vertical
pusher members so that a plurality of bags are removably 50
held at the forward end of the magazine and kept and
2,368,483
, 2,402,056
2,421,515
2,652,919
2,674,853
2,679,313
2,706,034
2,770,984
2,785,791
2,858,007
Monroe ____________ __ Jan. 30,
1945
King ________________ __ June 11, 1946
McNamara __________ __ June 3, 1947
Iochem _____________ __ Sept.
Born _______________ __ Apr.
Gueifroy ____________ _._ May
Russell et a1 __________ __ Apr.
22,
13,
25,
12,
1953
1954
1954
1955
Loecy ______________ __ Nov. 20, 1956
Cordis _____________ __ Mar. 19, 1957
McCain ____ __________ __ Oct. 28, 1958
Документ
Категория
Без категории
Просмотров
0
Размер файла
2 428 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа