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Патент USA US3076980

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Feb. 12, 1963 -
‘
A. L. SMITH ETAL
_
3,076,970
MACHINE FOR PRODUCING METAL FASTENERS AND APPLYING
SAME TO; 'IHE GATHERED NECK OF A FLEXIBLE CONTAINER
Filed Sept. 6, 1960
10 Sheets-Sheet 1
21627751!
ea’Z 472279772
Feb. 12, 1963
3,076,970
A. L. SMITH‘ ETAL
MACHINE FOR PRODUCING METAI; FASTENERS AND APPLYING
SAME TO THE GATHERED NECK OF A FLEXIBLE CONTAINER
Filed Sept. 6, 1960
10 Sheets-$heet 2
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Feb. 12,1963
A. L. SMITH ETAL
3,076,970
MACHINE FOR PRODUCING ME'I‘A-L FASTENERS AND APPLYING
SAME TO THE GATHERED NECKOF ‘A FLEXIBLE CONTAINER
Filed Sept. 6, 19.60
10 Sheets-Sheet 3
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Feb. 12, 1963
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A. 1.. SMITH ETAL
3,076,970
MACHINE FOR PRODUCING METAL FASTENERS AND APPLYING
SAME 'ro THE GATHERED NECK OF A FLEXIBLE CONTAINER
Filed Sept 6, 1960
10 Sheets-Sheet 4
Mag/ml
Feb. 12, 1963
A. L. SMITH ETAL
3,076,970
MACHINE FOR PRODUCING METAL FASTENERS AND APPLYING
_SAME TO THE GATHERED NECK OF A FLEXIBLE CONTAINER
Filed Sept. 6, 1960
, l0 Sheets-Sheet 5
Feb. 12, 1963
A. 'L. SMITH ETAL
3,076,970
MACHINE FOR PRODUCING METAL FASTENERS AND APPLYING
SAME TO THE GATHERED NEGK OF A vFLEXIBLE CONTAINER
Filed Sept. 6, 1960
l0 Sheets-Sheet 7
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Feb. 12, 1963
'
A. L. sMrrH ETAL
,_ ‘3,076,970
MACHINE FOR PRODUCING METAL FASTENERS AND APPLYING
Filed Sept. 6, SAME
1960TO THE GATHERED NECK OF A FLEXIBLE CONTAINER
10 Shéets-Sheet 8
Feb. 12, 1963
A. |_. SMITH ETAL
3,076,970
MACHINE FOR PRODUCING METALFASTENERS AND APPLYING
SAME TO THE GATHERED NECK OF A FLEXIBLE CONTAINER
Filed Sept. 6, 1960
10 Sheets-Sheet 9
@' W?
Feb - 12, 1963
A. L. SMITH ETAL
3 076
MACHINE FOR PRODUCING METAL FASTENERS AND APPLYIIBIG
'970
SAME TO THE GATHERED macx OF A FLEXIBLE CONTAINER
Filed Sept. 6, 1960
1O Sheets-Sheet 10
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United States PatentC ”
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3&76370
Patented Feb. 12, lassv
1
2
35676370
one of the fasteners ?ies out of the machine. While such
action may be of no particular consequence in general
Alfred L. Smith, Westiield, .lohn E. Gohring, Scotch
Plains, and William R. Gohring, Osbornsville, NJZ,
assiguors, by mesne assignments, to American Fastener
meat industry wherein the prepared meat product is con
tained in open Wagons prior to transfer to the casing
stufrlng apparatus. The possibility or loose fasteners ?nd
ing their way into the meat product is the reason why
this particular type of machine cannot be installed in the
MACHHNE FGR PRQDUCENG METAL FASTENERS
AND APPLYING §AME T6 'li‘iill GATHERED
NECK OF A FLEXIBLE CGNTAINER
applications, it is of serious importance in the compacted
Corporation
Filed Sept. 6, 1960., Ser. No. 54,294
7 Claims. (ill. 1-466)
meat room, that is, the room where the casings are ?lled
10 with the meat product under pressure.
This invention relates to a machine for automatically
making an individual metal fastener from strip stock and
applying the fastener as an encircling band around the
gathered neck of a ?exible container to thereby retain the
container in the closed position.
Flexible, transparent containers ?nd increasing use in
numerous industries for purposes of product preservation,
sanitation, enhancement of appearance and also as eco
nomical means for packaging assorted items. Examples
Consequently, it
presently is necessary to tie a cord temporarily about each
casing neck for movement of the stuffed casings to th
fastener-applying machine.
'
Machines have also been provided for applying metal
fasteners to ?exible containers and wherein the individual
fasteners are cut from a continuous supply stock. These
have found only limited use primarily by reason of the
fact that it is necessary to apply a crimping operation to
secure the fastener ?rmly on the casing neck. Such op
of such uses are plastic and natural animal casings for 20 eration, which often punctures the bag material, is made
sausages and other compacted meat products, thin plastic
necessary by the fact that the machines are not provided
bags for poultry, ham, etc., and more rugged plastic bags
with means for readily adjusting the size of the fastener to
for produce, chemicals, liquids and small parts. In gen
conform to the particular size of the gathered casing neck.‘
eral, the open neck of the ?lled casing is twisted or
Further, the machines are so designed and constructed
gathered together and is sealed in such condition by a 25 that a given machine is made for use by either a right
metal fastener.
handed or left-handed operator.
‘
It is highly desirable that the‘ metal fastener be of such
A machine made as described herein is not open to the‘
character that:
objections of prior machines, is of light weight so that
(1) It can he applied quickly and easily to the gathered
it is readily portable, is of small size thereby occupying
a minimum of space, is of simple and positive operation,‘
neck of the container,
(2) It is free of sharp edges to eliminate possible punc
is not restricted to a spcci?c'operator dexterity, is con
turing of the container material either during the fastener
applying operation or upon subsequent handling of the
veniently adjustable by an inexperienced operator for use
with different size containers, applies the fastener to the
casing as a'neat, tightly-secured circular band of pleasing
(3) It has a smooth outer wall free of protuberances, 35 appearance and reduces the cost of making and applying
to prevent possible entanglement with other similar con
the fasteners to a minimum.
tainers haphazardly disposed in a shipping carton or on
An object of this invention is the provision of novel
apparatus for producing metal fasteners and applying the
a display counter,
,
'
same about a ?exible container to retain same in a sealed.
(4) It forms a positive container closure, and
40
(5) It can be made economically.
condition.
An object of this invention is the provision of an auto-1
A machine made in accordance with this invention
encased product,
7.
.
produces and applies fasteners in a manner which meets‘
the above-stated requirements.
Brie?y, the machine comprises means accepting the for 45
ward end of a continuous length of strip stock having a
predetermined cross~sectional con?guration, means for in
termittently advancing the forward end of the strip stock
matic machine for producing individual fasteners from
a continuous, pro-formed strip of ductible metal, and ap
plying each fastener as a securely-af?xed, encircling band
about the gathered neck of a ?exible container.
An object of this invention is the provision of a ma
chine of this character wherein the formation of the in
a predetermined distance to a cut-off station, means sever
dividual fastener and the securing thereof to the casing
ing the strip stock to form an individual ?at fastener of‘
neck is performed as a continuous operation.
An object of this invention is the provision of an auto-‘
predetermined length and means for applying the fastener
tightly about the gathered neck of a container in the form
of a substantially circular band. The cutting oil of the
end of the strip stock and the securing thereof to the con
tainer neck is performed as a continuous operation.
Numerous forms of bag-sealing machines are presently
available most of which are designed for operation with
individual, preformed fasteners of one or another speci?c
matic machine for producing and applying a metal fas
tener to the gathered neck of a ?exible container which
machine comprises an operating station for accepting the
gathered neck of the container, a pair‘ of forming dies
operable from a normal open position ‘spaced from the
operating station to a closed position, automatic means‘
for operating the dies through one complete operating
cycle upon insertion of a gathered casing neck into the
carrying the preformed fasteners and an aligning mech 60 operating station, and means effected upon each operating
cycle of the dies to advance an individual, ?at fastener
anism to feed the individual fasteners to the forming dies
into the operating station whereby closure of the dies
in a ‘given orientation. One di?iculty with such machines
applies the fastener as a substantially circular band'about
lies in the frequent jamming of the fasteners in the align~
the container neck.
ing mechanism. Further, a preformed fastener of given
An object of this invention is the provision of an auto
size is useful only for securing casings of a given size and.
matic, air~operated machine wherein an end of a con
material thickness and the conditioning of the machine
tinuous length of strip stock is intermittently advanced
to operate with other fasteners of a different size involves
a major operation often requiring a changing of the form- _
a predetermined distance and cut oh and applied to the
gathered neck of a ?exible container in a continuous
ing dies. Still further, the necessary construction of a
form. ‘ However, ‘such machines require a hopper for
machine for operation on individual, preformed fasteners
operation.
(which involves a crimping operation to secure the fas
tener to the ‘container neck) is such'that occasionally
tion will become apparent from the following detailed
These and other objects and advantages of the inven
8,076,970
3
4
description when taken with the accompanying drawings.
detail hereinbelow, the mounting plate constitutes a
It will be understood, however, that the drawings are for
chassis ror supporting most of the operatingcomponents
of the machine. A pair of complementary housing cov
ers 12., 13 enclose all of the operating components with
the exception of those which desirably should be ex
purposes of description and, are not to be construed as
de?ning the scope or limits of the invention, reference
being had for the latter purpose to the claims appended
hereto.
ternally available for normal machine operation. Such
In, the drawings wherein like reference characters de
note like parts in the several views:
FIGURE 1 is an isometric view showing the complete
machine;
FIGURE 2 is an elevational view showing the right
side of the machine, and with the housing covers re
covers may be secured in place in any suitable manner
as, for example, suitable hinges and snap locks or, as
shown in the drawing, by suitable screws 13’. In any
10 event, the covers are removable to afford ready access
to the internal machine components.
7
At the front end of the machine, one surface of the
mounting plate 10 is recessed to accommodate a die plate
FIGURE 3 is a cross-sectional view taken along the.
14, which plate is provided with a slot aligned with a
line III-III of FIGURE 2, drawn to an enlarged scale, 15 corresponding slot formed in the mounting plate thereby
and shows the supply spool mounted in the operative
forming an entrance slot 15. A portion of the side walls
position;
de?ning this slot in the mounting plate are recessed
FIGURE, 4 is a, cross-sectional view taken along the
thereby forming a raceway 16 having a width exceeding
line,I,V—.—-I',V of FIGUREZ and showing how the driving
that of the slot 15. The slot 15 constitutes a guideway
air cylinder is secured in position;
20 for directing the twisted, or gathered neck‘ of a ?exible
FIGURE 5 is a cross-sectional view taken along the
container, such as the illustrated casing .17 containing a
line,V‘-V of FIGURE 2’ and shows the mechanism for
compacted meat product, to the fastener-applying. sta
feeding the, strip stock to the cut-off station of. the
tion, it being noted that the forwardv end of the slot 15
machine;
diverges along smooth curves to facilitate entry of the‘
FIGURE 6 is an, elevational view similar to FIGURE 25 casing neck into the slot. On the other. hand, the race
2;and showing the left; side of the machine with the cov
way 16 permits the withdrawal. of the casing neck after
ers removed;
the fastener has been secured thereto, which may be
FIGURE» 7, is a-_ vertical, cross-sectional view; taken,
more clearly understood. as the description proceeds.
alongrtheline; VII-..-VI,I of, FIGURE 6 and showing a.
The operation of'themachine is completely automatic.
portion of the linkage mechanism controlling operation
For the present, it is pointed out that a metal trip'?nger‘
bffthermachine;
is spring biased so that an end thereof’normally-protrudes
moved;
FIGURE. 7A is-a-fragmentary, elevational'view show
ing the linkage mechanism in position for starting opera
tionof the machine;
into the fastener applying station. As the operator moves ‘i
a twisted casing neck along the slot 15 to the inner end
thereof, the casing engages the protruding end of'the trip
FIGURE 8i s a similar- view showing the linkage 35 ?nger causing same to move from its normal position.
This actuates, through a linkage mechanism, a control
mechanism inthe position occupied when the pistonrod.
isat its upper limit of travel;
member thereby causing the machine to perform a com
‘FIGURE 9 is a, top view of, the machine, with the
plete operating cycle. Such operating cycle includes the
housingcovers; removed and, with certain parts omitted;
relative movement of a pair of forming dies from the nor
‘FIGURE 10 is a fragmentary, side viewof the front 40 mally open position to a closed position. The relative
endof themachine, similartoFIGURE 2 but drawn-to
movement of the dies ?rst cuts a predetermined length
an; enlarged scale and with the-die plate removed to ex
of strip from a continuous metal ribbon carried by a
pose the forming dies and relatedmachine components;
supply roll, thereby forming an individual metal fastener.
'FIGURE 11 is a vertical, cross-sectional view taken
alsns-th¢1ineXI.—XI of FIGURE‘ 10;
' FIGUREv 12, is~an elevational view showing ‘the front
face gfzthe die-plate;
FIGURE-'l3y;is-;aqsimilar; viewlshowing the rear face
of the die plate; ,
Further relative movement of the dies forms" the nor
45
mally-?at-fastener into an encircling band ?rmly applied
to the casing neck. The dies then separate, the stock
material is advanced a predetermined distance and the
machine returns. to the original, standby'position ready
for-repeating the operating cycle. The sealed casing may -'
. FIGURE-1413a vertical, cross-sectional view taken 50 now-‘be withdrawn from the machine with the metal, en
a1ons-the.»line,XI.V——XI_,V of FIGURE-13.;
circling band slidable along the raceway. 16.
FIGURE .15, is ‘a; fragmentary, side ‘view,’ similar to
The manually-rotatable knob. 19 ‘ provides means for
FIGURE ltlbut drawnito a stillfurtherenlarged scale,
adjusting. the relative spacing between the upper, rela->
and-showing theforrning»diesinufully open position;
tively-stationary'forming die and the lower, vertically
’. ‘FIGURE ~‘16tis'similar, to FIGURE 15, but-showing the 55 reciprocatlng die. A precise adjustment of the relative‘
dies-impartially closedposition;
FIGURE ~;17_ is sirnilantov FIGURE , 15
spacing between the .two dies-is facilitated by the calibra
but , showingv
the dies-:mfullvclqsed position; ~
FIGUREJS ;is,a;verti_cal, cross~sectional view-taken
alqngzth‘? lint?
' -=F1ousE>1
HIT'QWIII ,Of. FIGURE -1 5 ; .
9,,is;_-_av vertical, cross-sectionalv view taken
atsnsihe 11.11e.~XjlXx—XI;X-.0f:-FIGURE 16;
~ FIGUREjZQ, is_;a-,vert_ical, cross-sectional view taken
tion markings carried by the ?ange 20 and the ?xed refer-'
ence mark M, the ?ange being rotatable as'a unit with
theknob .19. The rotatableknob 21, on the otherhand,
provides a meansfor manuallyadvancingthemetal strip;
stock from‘ the supply roll towardthe fastener-applying;
station. This-‘knob is'used primarily to feed theend of"
a new .supply roll to- the point ‘where the automatic feed
mechanism is e?ective.
; FIGURE~21 ‘is an isometric view of one of the spring 65
When the machine is to beused for sealingcasings"
biasedslides which'serve to prevent undesirable deforma
containing meat products, the base, covers, central mount
tion of the twisted container neck duringthe. fastener
ing plate and the die plate preferably are made of stain-'
applyins Operation;
less steel, to meet the sanitation requirements of such in
alongjthe line XX-XX of FIGURE 17;
FIGURE 22 is ‘an isometric view showing the forming
dies; ,and».__
FIGURE 23,,is ‘an enlarged, fragmentary, central, cross
sectionalhview showinga fastener applied to a container.
Reference is ?rst made to FIGURE 1 showing the
complete machine... A vertical mounting plate 10 is rig
idly ,securedgtos a base plate .11, As will ~be described in‘
dustry and ,because of the salt atmosphere prevailing in‘.
70 the meat room.
Reference is. now made to FIGURE 2 which is an-ele
vational view showing the right side of the machine with
the housing covers removed. The center, vertical mount»
ingplate >10.is_ provided with integral lugs 25 whereby‘
the plate is. securely fastened tothe base 10 by means of
3,076,970
6
5 .
screws 26 passing through clearance holes in the lugs and
Reverting back to FIGURE 2, it will be seen that the
hole 59* in the crank arm 6t? is of elongated shape and
into threaded holes formed in the base. Four suction
cups 27 are provided when it is desired to operate the
that the crank arm is pivotally supported on the mount
ing plate 10 by means of a suitable screw 61 passing
machine on a table or bench and yet be able to move the
machine to a different location. Inasmuch as the machine
weighs only approximately 35 pounds, it is portable and
through a clearance hole in the crank arm. For the
moment, assume that the piston rod 45 moves vertically
readily movable from station to station within the plant
upward, under the influence of air admitted to the air
of the user. Obviously, when the machine is to occupy a
cylinder 46. During the initial upward stroke of the
more or less permanent position, it can readily be bolted
piston rod, the bushing end 58 merely moves within the
or otherwise secured to an appropriate stand, table or 10 elongated crank slot 59. However, when the bushing end
other support.
engages the upper wall defining the slot 59, further up
The rear portion of the mounting plate 19 accommo
dates a spool 28 which is rotatably mounted and which
carries many hundreds of feet of ductile metal in the
ward movement of the piston rod causes a correspond
form of a continuous strip, or ribbon, of the proper cross
ing rotation of the crank 6%} about its pivot axis 61.
Upon completion of the subsequent down stroke of the
15 piston rod the crank arm 69" will be returned to the posi
sectional dimension, from which the individual fasteners
tion shown in the drawing. This oscillatory movement
are cut during operation of the machine.
of ‘the crank arm actuates mechanism for the proper
In order to
provide a large supply of the strip stock material, the
feeding of the metal strip stock to the cut-off station,
supply spool has an axial width exceeding that of the
as will now be described.
mounting plate, as shown clearly in FIGURE 3, which 20
A collar 65 is pivotally secured to the right end of
is a cross-sectional view taken along the line III-III of
the crank arm 6t} and is provided with a central clearance
FIGURE 2. A spool-mounting bracket 29 is secured in
hole for the lower, threaded end of the rod 66. A similar
spaced relation to the mounting plate it} by the screws
collar 67 is pivotally secured to the arm 68, of a mechani~
30 and the spacing bushings 31. A shaft 33, having a
cal clutch 69, and is provided with a central hole accom
reduced diameter, threaded end 32 passing through a cen 25 modating the upper end of the rod 66. The rod 66 may
tral hole in the bracket 29, is secured ?rmly to the bracket
be secured to the collar 67 as by the screw 70. A bush
by a nut 34 and the opposite end of the shaft is provided
ing 71 is similarly secured to the rod 66 and abuts the
with a threaded, axial hole which receives the threaded
collar 65 thereby establishing a fixed spacing between
shank 35 of the knurled locking bolt 36. It will be noted
the end of the crank arm 6%} and the arm 68 of the clutch;
that the axial length of the shaft 32 is slightly longer than
Consequently, any counterclockwise rotation of the crank
the axial Width of the spool 28 whereby the spool is free
arm will result in a corresponding counterclockwise rota;
to rotate about the shaft even though the bolt 36 is ?rmly
tion of ‘the clutch arm. However, the extent of the angu
threaded into the shaft hole.
lar rotation of the clutch arm, upon clockwise rotation of
Referring back to FIGURE 2, it will be seen that the
the crank arm, is determined by the setting of the knurled
vertical mounting plate 10 is provided with a circular hole 35 adjustment nut '72 operating on the lower, threaded end
37 of a diameter slightly larger than the diameter of the
of the rod 66. Speci?cally, if the nut 72 is threaded so
spool ?anges so that the supply spool may readily be in
that its'inner face abuts the collar 65, the angular rota
serted into the operative position or removed therefrom.
tion of the clutch arm 68 in a clockwise and counter
Normally, the supply spool carries a length of stock mate
clockwise direction will correspond precisely to the re
rial sufdcient to make 10,000 individual fasteners. As 40 spective downward and upward movement of the right
shown in the drawing, the free end 39, of the stock matef
hand end of the crank arm 6!}. However, when the ad
rial, passes to a feed station 49, the function ofrthe mech
justing nut 72 is spaced from the collar 65, the initial‘
anism at the feed station being to advance the supply
downward movement of the crank arm produces no rota
stock a predetermined extent to the cut-off and fastener
tion of the clutch arm. Inasmuch as the stroke of the
applying station, designated 41.
piston rod 45 is a ?xed predetermined distance, it will be
The machine is air-operated, preferably at an air pres
apparent that adjustment of the nut '72 presets the amount
sure of 100 pounds per square inch, air supplies of this
of angular rotation imparted to the clutch for each cycle‘
character. being generally available in plants having need
of piston rod movement. A self-locking type nut 73 pre
for a machine of this type. At the moment it will sunice
vents complete dises?agement of the adjusting nut 72
to point out that the driving force for the machine is de
from the rod 66 and the spring '74 aids in ‘restoring the
rived from the piston rod 45 of an air cylinder as. The
clutch arm to the normal position. “ The mechanical
air cylinder is of conventional type and is enclosed within
clutch 69 is so arranged that it slips upon clockwise rota‘a
a conforming casing terminating in integral ears 47 pro-‘‘
tion of the clutch-arm and rotates the shaft ‘75 upon
vided with suitable holes to receive the set screws 48
counterclockwise rotation of the clutch arm. It is the
which are threaded into correspondingly threaded holes 55 rotation of the shaft 75 which results in a predetermined
in the vertical mounting plate lit), to thereby secure the
air cylinder to the plate. Top and bottom cap plates 69
and 59, respectively, are secured by means of'the bolts
advance of the strip stock 39 from the supply spool to
the cut off station 41 as will now be described with
51, said plates, together with the cylindrical casing, con-vv
stituting a sturdy enclosure for the air cylinder. Refer 60
ence is made to FIGURE 4 to complete the description
of the air cylinder and the mounting means therefor.‘ It
will be noted that the air cylinder 46 is positioned cen_-,
trally of the vertical mounting plate It}, the latter being
provided with a generally rectangular opening 52 for
this purpose. In such arrangement, the piston rod 45
moves in the plane of the mounting plate 10 and the
center of the piston rod falls on a center line drawn
through the middle of the mounting plate. A threaded
speci?c reference to FIGURE 5 which essentially is a
cross-sectional View taken along the line V—V ofPiG
URE 2.
>
i
As shown in‘FIGURE 5, the vertical mountinglplatc
It) is provided with a generally rectangular opening Stl to
accommodate the two wheels 81 and 82. Wheel 31 is
secured to the shaft ‘75 which also carries the mechanical
clutch 69 and the wheel 82 is secured to the shaft 83 car-'
rying the knurled knob 21 (see also FIGURE 1). The
opening in the mounting plate 10 is closed by a plate 84
which is secured to the mounting plate by screws 85 (as
shown in FIGURE 2) and a similar plate 86 is secured
stud 55, carrying a nut 56 on one end, passes through 70 to the opposite surface of the mounting plate It}. These
a hole in the piston rod. A bushing 57 is threaded on
closure plates 84 and 36 are provided with. aligned sets
the other end of the stud, thereby securing the stud to
the piston rod, and such bushing is provided with a re
duced-diameter end 58 which passes through a hole 59
formed in a crank arm 69.
-
.
of holes which accommodate suitable bearings 87 and 88
for the respective shafts 75 and 83. The peripheral surl
face of the wheel 81 is knurled whereas the peripheral
75 surface of the wheel-32 has cemented thereto a rubber
8,076,970
ring 89 and the normal ‘spacing between these wheels‘ is
less than the thickness of the metal ribbon stock.
Secured to the other ends of the shafts 75 and 83 are
meshed similar gears 90 whereby the wheels 81 and 82
rl'nust rotate simultaneously and in opposite directions.
Thus,- when the clutch 69 rotates the shaft 75, and assum-,
8.
101 having an end disposed at the base of the slot 15.,
The trip ?nger is slidable within a suitable slot formed
in the mounting plate 10, includes a forwardly‘ bent por
tion passing through the plate hole 110, and has its ex-»
ternal end pivotally secured to a vertical arm 111 as by
a rivet 112. As best shown in FIGURE 7,» which is a
ing the strip stock 39 has already been fed between the
wheels, the pressure exerted against the strip by the rubber
surface of wheel 32, together with the knurled ‘surface on
cross-sectional view taken along the line VII-VII of
FIGURE 6, the vertically-depending arm 111 is secured
wheel 81, assures a linear advancement of the ribbon cor¢
axial hole provided in the spacer bushing 114, thereby
clearing the feed-station drive gears 90. Such bushing
is provided with a reduced-diameter forward end passing
responding ,preceisely to the extent of angular rotation of
the shaft 75 by the clutch. Advancement of the strip stock
can also be effected manually by rotation of the knob 21.
Such action is required to feed the end of a new strip of
stock material between the wheels andrvfor advancing such 15
strip end to the cut-off station in order to condition the
to the cover plate 86 by a screw 113 passing through an
through a clearance hole formed in the arm 111 so that
when the screw 113 is threaded ?rmly in position the arm
is freely rotatable. An auxiliary arm 115 has one end
?rmly secured to the arm 111, as by the rivets 116, and.
the other end offset and parallel to the lower portion of
machine for‘ immediate operation. Also, occasion may
the arm 111. The lower ends of the parallel arms‘ 111
require the manual advancement of‘ a random length of
ribbon through the machine without the actual formation
and 115 span a transverse arm 117 and carry a pin 118
and application of fasteners to casings, as when portions 20 that normally is disposed within a notch formed in the
ofthe supply ribbon are defective. As shown in FIG
lower edge of the arm 117, as best seen in FIGURE, 6.;
URE 2, the opening 37 formed in the mounting plate 10
A tension spring 119 biases‘ the pivoted vertical arm 111
includes an extended section 95 which converges toward
in a counterclockwise direction.
v i
the feed station 40 to form a‘guide opening’ for the manual
As shown in' FIGURE 6, the end of the trip ?nger 101
direction of the end ‘of the strip 39 into the space between 25 extends into the slot 15 and they actuating mechanism is
the feed wheels. Once the end of, the strip strikes the
in normal, standby, position, that is the machine is in con-_
dition ready for operation. When a twisted casing neck
surface of either wheel, rotation of the knob 21, will force
thestrip stock to pass between the‘ wheels and along a
is inserted along the slot 15, the bag neck contacts the end
guideway'leading to the cut-off station 41.
‘
of the trip ?nger 101. A further, slight, inward move?
,Beforerleaving FIGURE‘ 2, it may be well to point out 30 ment of the bag neck results in a movement of the trip
that they machine is connectable to a source of air under
?nger to the left. It is here pointed out‘ that the bag neck
pressure by means of snap-on coupling connected to the
occupies the fastener-applying position when the end of
\coupling 96 extending externally of the machine housing.
the trip ?nger is displaced only a short distance to the
Air from the source is directed to a coupling box 97
point where the forward end of the ?nger coincides with
‘through a tube 98. Air, at source pressure, is directed 35 the wall forming the enlarged circular opening at the
to a control valve, located on‘the opposite side of the
inner end of the slot 15. Movement of the, trip ?nger
mounting plate 10, through a line 99, whereas a suitable
to the left (see FIGURE 7A) results in a clockwise rota
pressure reducer, in the box 97, provides air at a pressure
tion of the vertical arm 111 which, in turn, results in a
‘of approximately 15 pounds per square inch in the line
movement of the transverse arm 117 to the left by reason
100‘ for the purpose of positively driving the piston rod 40 of the pin 118 striking the sharp wall de?ning the notch
ina downward direction to its normal position during the
in the arm 117. The left end of the transverse arm 117
return cycle of machine operation. Attention is directed
is'pivotally secured to the valve-operating lever 107. Coni
sequently, the leftward movement of the arm 11,7 rotates
to the end of the trip ?nger 101 visible at the inner end
of‘ the slot 15. This?nger extends axially of the slot
the control lever 107 in a counterclockwise direction and
and movement thereof to the right (by means of a gath 45 the dinkage mechanism is so designed that the described
displacement of the trip ?nger moves the control lever
ered casing neck) starts the operating cycle of the, ma
to the ON position. In such position of the lever 107,
chine, as will be described'in detail hereinbelow. Atten
the control valve 105 admits air from the line‘ 99 to the
tion is also directed to the die plate 14 which is secured
line 106 thereby driving the piston rod 45 upward.
,
to-the mounting plate 10 by ?ush, set screws 102 and’
As‘ the piston rod moves upwardly, the screw 55 engages
which ‘has been 'mentioned'with reference to FIGURE 1; 50
the right hand end of the transverse‘ arm 117 causing
The function'of' the die. plate will also be described in
the same to rotate about its pivot connection to the con
detail hereinbelow with reference to ‘FIGURES 12-14.
trol lever 107. As has been explained with reference
Referenceisnow made'to FIGURE 6, which is similar
to FIGURE 7, the pivoted, vertical arm 111 is spaced
to_;FIGURE 2_ but showing the left side of the machine.
The integral lugs 25? and the cooperating bolts 26' corre
from the plate 86 to clear the gears 90. Consequently,
spond to the similar lugs 25 andbolts 26 shown in FIG
URE 2,’ from which it will be apparent that the vertical
the transverse lever 117 includes a double bend‘ to‘ the.
mounting plate 10 is rigidly/secured to the base 11. _ The
end of the lever 117 proximate to the piston rod for
right of the pin 118, such bend bringing the right hand
supply'spool 28, rotatably; mounted on the bracket 29, car
proper engagement by the screw 55. The counterclock
ties the stock material 39, which material is advanced peri= 60 wise rotation‘ of‘th'e lever 117, by the piston rod screw 55;
odically. by the feed, station 40 to 'the-cut-of‘f station 41.
causes‘ the pin 118 'to' become disengaged from the ‘notch;
Air, at substantially sourcepressure, is supplied to the
as shown in FIGURE 8. It must be’ remembered that
control valve 105 bytheline 99 (see also FIGURE 2).
at this point in the’ machine‘ operating cycle, the twisted‘
The valve 105 is of conventional construction and sup
neck of they casing is still disposed at the fastener'applying‘
plies air, at line pressure, to the air cylinder through the
station, that is,‘ at‘ the innermost end of the slot 15 ‘(FIG
line 106 when the pivoted control lever 107 is tilted to
URE 6) and, therefore, the trip ?nger 101 retains the‘
the left, thereby resultingvin an upward movement of the
vertical arm 111 in the clockwise, displaced position.‘
piston rod 45, the latter being movable in the opening
Once the pin 118 becomes disengaged from the trans‘
108 formed in the vertical mounting plate 10. As shown
verse arm 117 the tension spring 109 returns the control‘
in the drawing, the valve control lever 107 normally is 70 lever 107 to‘ the OFF position, it being clear that the‘ right
biased in aclockwise direction by a spring 109 and in such
hand end of the arm 117 is free to slide‘over the screw
position of the lever the ?ow of air is cut off from the
air cylinder. Actuation of the control lever 107 to the
position illustrated in FIGURE 8. The mechanism isv‘so
left, ‘valve open’ position is accomplished by a linkage
mechanism controlled by the position of. the, trip’ ?nger
lever 117 when the piston rod 45 reaches, the end of its"
55 as the spring 109 rotates the lever 107 to the OFF
arranged that the pin 118 becomesv disengaged'from the
3,078,970‘
9.
upward stroke by which time the forming dies have ap
the upper die 125 is mechanically coupled to the threaded
plied a metal fastener around the neck of the casing.
shank of the knob 19, such shank operating in a cor:
A return of the control lever it}? to the OFF position
closes the control valve 1655 thereby shutting off the air
?ow in the line 1% to the air cylinder, see FIGURE 6.
When this occurs, air at a substantially reduced pressure,
respondingly-threaded hole provided in the block 129,
The block 129 is ?rmly secured to the mounting plate
10 whereby rotation of the knob 19 constitutes a means
for precisely setting the position of the relatively-?xed
approximately 15 pounds per square inch, is effective
and drives the piston rod to its original position. Re
ferring to FIGURE 2, the reduced pressure air is supplied
upper die 125 with respect to the lower movabledie 1245.
thereby to condition the machine for operation with a
twisted casing neck having a given, nominal diameter.
to the air cylinder through the line 103, a suitable pres 10 The upper end of the piston rod 455' is milled to a reduced
sure reducer being provided in the connection box 97.
thickness to match a reversely~milled section at the lower
Reverting back to FIGURE 6, a high pressure vent valve
end of the die 126 whereby, when the die is secured to
129 communicates with the upper chamber of the air
the piston rod, as by the pin 13%, the outer surfaces of
cylinder and is effective to vent the air above the piston
these parts are ?ush with the contiguous surface of the
during the upward drive stroke of the piston rod.
15
mounting plate.
A return of the piston rod to its initial, lowermost
An insert plate 132, of hardened steel, is disposed in
position will permit the transverse arm 1117 (see FIG
a milled-out portion of the surrounding plate 10 and is
URE 8) to rest upon the pin 113 which remains displaced
secured to the mounting plate 19 by screws, not shown.
to the left as long as the trip ?nger Itill remains displaced,
and the forward surface thereof is ?ush with the con
that is, as long as the casing neck is disposed at the base 20 tiguous surface of the mounting plate. The milled-out
of the slot 15. Inasmuch as the entire operating mech
portion of the plate It? has a width exceeding that of
anism is enclosed within the machine housing, it is im
the insert plate, whereby the lower face of said II‘llli?d‘.
possible for the user to cause a second actuation of the
out portion and the adjacent surface of the insert plate
machine. However, when the sealed casing is removed
form a giuideway for the forward portion of the strip
from thetslot 15, the spring 119 returns the vertical lever 25 stock as the latter is advanced by the feed wheels. Al
111 to the original, vertical position wherein the pin
though the strip stock is coiled on the supply spool, it
118 is again ‘disposed within the notch formed in the
becomes straightened out and of substantially mono
transverse lever 117. Simultaneously,’ the end of the
planar disposition as it passes through the just'mentioned
trip ?nger is returned to ‘its original position and the
guideway to the fastener-applying station. The arrange
machine is in condition for performing another operatl 30 ment of these parts is best shown in FIGURE 11, which
ing cycle. '
is a vertical, cross-sectional view taken along the line
Before proceeding to the description of the cut off
XI——-XI of FIGURE 10 but also showing the die plate
and fastener-applying operation it appears desirable to
14 to facilitate an understanding of the construction.
refer brie?y to FIGURE 9 which is a top View of the
Also shown in FIGURES 10 and 11 is the trip ?nger
machine but with parts omitted to facilitate an under 35 101 which has a forward portion parallel with the for
standing of the machine assembly. Here are shown the
ward surface of the insert plate 132 and a central, offset
vertical mounting plate It} having integral, oppositely~
portion passing through aligned openings formed in the
directed lugs 25 and 25’ and cooperating bolts as, 26'
insert plate and the vertical mounting plate 10, so that
which secure the mounting plate rigidly to the base 11.
the other end of the trip ?nger is disposed on the op
The supply spool 28 is rotatably supported by the bracket 40 posite side of the machine.
arm 29 and is of relatively large axial width thereby to
In FIGURE 10, the end of the strip stock 39 is shown
carry a long length of the metal strip stock from which
advanced to the cut off station, that is, between the nor
the individual fasteners are cut. The strip passes be
mally-spaced mating ends of the dies 125, 126. A gener
tween the cooperating wheels at the feed station, the
ally triangular-shaped member 134, made of spring
manually-rotatable knob 21 and the upper drive gear 96
steel, is secured to the reverse side of the mounting plate
being visible in the drawing. At the proper time in the
10, extends through a similarly-shaped, clearance opening
operating cycle of the machine, the feed wheels ad
formed in the mounting plate, ‘and has an. integral, in:
vance a predetermined length of the strip to the cut oh
wardly, directed tip 135 which partially overlies that por
and fastener-applying station disposed above the air cylin
tion of the strip stock disposed between the dies. FIG
der 46. Relative adjustment of the spacing between the
URE 6 shows the member 134 secured to the mounting
forming dies, which apply the flat, cut-off piece of strip
plate 10 by the nut 136 cooperating with the screw 137,
stock as an encircling band around the twisted casing
the upper portion of the member projecting into the die
channel through the opening 133. The member 134 also
neck, is controlled by the manually-rotatable knob 19
includes an elongated dimple 139 which normally pro
having a ?ange 20 carrying calibration markings aligu~
able with the ?xed reference mark M engraved, orother
jects into the path of travel of the lower forming die 126.
A similar, generally triangular-shaped member is carried
wise formed, on the top surface of the vertical mounting
plate.
by the die plate and is correspondingly disposed with re
Reference is now made to FIGURE 10 which is a
spect to the strip 39 and the die channel when the die
plate is secured in positionon the vertical mounting plate.
fragmentary, elevational view showing the right side of
the machine (similar to FIGURE 2) but with the die 60 A better understanding of the construction, arrangement
and purposes of these triangular membcrswill be had
plate 14 removed. As stated above, this face of the
upon a reading of the description with‘speci?c reference
vertical mounting plate 1th is recessed to receive the die
plate such that the outer surface of the die plate will lie
to FIGURES 12—l4, below. For the present, and with
continued reference to FIGURE 10, the inwardly-directed
flush with that of the mounting plate. A vertical die
channel 124, extending above and below the slot 15 65 tips of the triangular members, such as the tip 135 visible
and of rectangular cross-section, is formed in the plate
in the drawing, restrain the strip against upward movei
10 and accommodates the upper, relatively ?xed forming
die 125 and the lower, complementary, movable die 126.
The forward surfaces of these dies lie ?ush with the con
tiguous surface of the milled out portion of the mounting
plate so that when the die plate 14 (see FIGURE 2) is
secured in position, the dies are con?ned yet slidably
movable within the die channel 124. As will be de
ment during the cut off, or severing operation and then
provide a stop for the central portion of the cut oifs
_ piece as the ends thereof are turned upwardly by the‘
scribed in detail, with speci?c reference to FIGURE 15,
lower forming die. At the precise point of cut off, the,
stripstock is con?ned within the channel formed between
the insert plate 132 and the ledge 133.
Now, as the
lower die 125 is driven upwardly by the piston rod, the
right hand edge of the die will shear ‘off the overlying’
piece of the strip stock, thereby producing an individual
3,076,970
11
the fastener upwardly to form a generally U-shaped mem
receiving the head of the pin 128. Such arrangement
permits removal of the die from the die channel and, at
ber having its base abutting the inwardly-directed tips
the same time, affords a means for the adjustment of the
of the triangular members. Continued upward move
ment of the die brings the detent 139, of the triangular
member 134, into engagement with a corresponding one
of two sloping surfaces formed in the front and rear
face of the die 126, the front such surface being visible
in FIGURE 10. Functionally, then, the continued up
ward movement of the die forces the triangular member 10
spacing between the operating ends of the two dies upon
rotation of the knob 19. This feature is highly desirable
fastener, and continued movement of the die‘ will bend
as it permits an inexperienced operator to condition the
machine for proper operation on a twisted casing neck
having a given, nominal diameter. Speci?cally, for a
casing neck of relatively small nominal diameter, the
relative spacing between the dies is less than‘ that re
quired for a casing neck of relatively large nominal
134 outwardly thereby removing the inwardly-directed
tip 135 from its normal overlying position relative to the
diameter.
fastener strip and, at the same time, permits further un
restricted movement of the die. Eventually, the ends
the ends of the fastener abutting each other when the
fastener is applied around the casing neck as a tight,
circular band.
In FIGURE 15, the dies 125, 126 are shown in the
fully open position with the forward portion of the strip
stock 39 advanced between the dies ready for the cut-oif
operation and the twisted neck of the casing 17 is shown
inserted to the innermost end of the receiving slot 15,
that is, in the fastener-applying position. In this posi
tion, the casing neck has engaged the end of the trip
?nger 101 and moved such ?nger slightly to the right,
thereby actuating the machine, as has already been de-'
scribed. It will be noted that the end of the strip stock
39 is disposed below the inwardly-extending tip 135 of
the triangular member. The described dispositions of
the dies, thestrip stock and the casing neck are also
shown in FIGURE 18 which is a vertical, cross-sectional
view taken along the line XVIII-XVIII of FIGURE 15.
As best shown in FIGURE 18, the block 129 is provided‘
of the now U-shaped fastener are directed into the com 15
plementary curved recess formed in the upper die 125.
The mating ends of the dies are so formed that the fas
tener is applied tightly as an encircling band around the
twisted neck of the casing. A clearer understanding of
the forming operation of the dies will be obtained from 20
the description, hereinbelow, with speci?c reference to
FIGURES 15-20. In FIGURE 10, it will be noted that
the inwardly-directed tip 135, of the member 134, is dis
posed below the wall de?ning the casing-receiving slot
15 so that the cutting of the strip stock and forming 25
In either case, a proper die spacing results in
thereof into a U-shape in no‘ way affects the twisted casing
neck which is disposed at the inner end of the slot.
As has already been described with reference to' FIGA
URES 2 and 5, the downward, return movement of the
piston‘ rod results in an advance of the strip stock and 30
the extent of’ such advance can be adjusted readily and
with holes 151, 151’ accommodating the upper ends of
conveniently. In this respect, it will be noted that the
COIIBCI. springs 152, 152'. These springs are disposed on
end of the strip does not abut against a stop to limit the
opposite sides of the vertical mounting plate 10 and the
amount of strip advancement, but, rather, advancement
of the strip is controlled by the angular rotation of the 35 springs individually rest upon the outwardly-directed tabs
153, 153' which are integral with the respective slides,
feed wheels 81, 82 for each cycle of machine operation.‘
154, 154’. The left slide 154 is vertically movable within
Hence, the length of strip severed from the supply roll
a. vertical slot formed in the mounting plate, whereas the
can be adjusted, through rotation of the adjustment nut
72, by the operator to match the size of the twisted casl 40 right slide 154' is similarly operable in a vertical slot 146
(see FIGURE 13) formed in the rear face of the die plate
ing neck, whereby the metal band will have abutting endsv
14. An isometric view of the right slide 154' is shown
when applied, tightly, to the casing neck.
clearly in FIGURE 21, it being apparent the left slide 154
Reference is now made to FIGURES 12-14, FIG
is of similar construction.
URE-12 showing the front surface of the die plate 14,
The springs 152, 152’ are under compression and bias
FIGURE 13 showing the rear surface of the plate and
FIGURE>14 being a vertical, cross-sectional view taken 45 the respective slides 154, 154' downwardly so that the
tabs 153, 153' rest upon the lower wall de?ning the holes
along the lines XIV»——XIV of FIGURE 13. The triangu
through which the tabs protrude outwardly. In this nor
lar member 134’, corresponding to the similar member
mal position of the slides, the lower ends thereof normally
134' shown in FIGURE 10, is secured to the die plate’
extend into the enlarged transverse opening which receives
the twisted casing‘ neck. Consequently, when the casing
neck is in thefastener-applying position, these slides exert
by means of the nut 136' and the ?ush~headed screw
137’. The upper: portion of the member 134’ is offset
and disposed within a triangular opening 138' formed
in the die plate whereby/{the tip 135’ and the detent 139'
project beyond the inneri'surface of the plate. It is clear
a spring~biased pressure normal to the neck axis and along
two planes on either side of the dies. This prevents un
desirable upward movement of the casing neck and retains
that when the die plate is secured in position on the ver 55 the upper surface of the bag neck spaced from the forming
tical mounting plate, the member 134' will be aligned
end of the upper die 125 during the fastener-applying
with, but reversely disposed to, the similar member 134.
shown in FIGURE 10. The horizontal channel 145
operation, thereby preventing possible pinching of the
casing material as the ends of the fastener are brought
into abutting relation to form the circular band.
formed in the rear, surface of the die plate, loosely ac
commodates the trip'?nger 161, ‘see FIGURE 10, and
the vertical channel 146 serves a‘ purpose to be described
hereinbelow with speci?c reference to FIGURE 18. The
60
FIGURE 18 clearly‘ shows the inwardly-directed ?ngers
135, 135’ overlying the strip stock 39 and the position of
the detents 132, 139’ which normally lie in the path of
travel of the lower die 126, the latter being secured to the
the vertical mounting plate thereby forming‘ a transverse
piston rod 45 by the pin 130. Also shown are the sloping,
receiving opening to accommodate the gathered casing 65 vertical surfaces 140, 140' that are formed in opposite
neck at the fastener-applying station.
faces of the die 126, which surfaces spread the members
Reference is now made toFIGURE 15 which is a
126, 126’ outwardly upon upward movement of the lower
fragmentary, side view, similar to FIGURE 10,. but
die 126 to thereby remove the ?ngers 135-, 135' from the
drawn to an enlarged scale. A headed pin 128 is force
die channel. The forward, sloping surface 140’ in the
?tted in an axial hole provided in the threaded shank of 70 die 126 is shown in the isometric view of the dies 125,
the’ adjusting knob 19 and such shank operates in the
126, FIGURE 22.
threaded hole provided in the block 129 that is secured
Since the casing neck is disposed in the fastener-apply
?rmly to the mounting plate 10. The upper end of the
ing position, the trip ?nger has been displaced to thereby
relatively-?xed die 125 is provided with a central slot
start the machine operation cycle, such cycle compris
terminating in an enlarged, transverse opening 127 for 75 ing a continuous upward'movement of the lower die to
semi-circular opening 147 matches the similar opening in
3,076,970
.
13
the die-closed position and a return of the die to the open
or normal position, which normal position is shown in
FIGURES 15 and 18. As the lower die 126 moves up
ward the right, upper end 131 thereof shears the strip
stock (see particularly FIGURES 1S and 22) along the
plane containing the right side of the die and the left side
of the hardened plate 132. During the shearing action,
the free end portion of the strip is restrained from upward
movement by the overlying ?ngers 135, 135' (see partic
ularly FIGURE 18). The severed portion of the strip
14'
position. Unless and until the fastened casing is with-‘
drawn from the machine, the trip ?nger remains de?ected
thereby preventing a-second cycle of machine operation.
As has already been pointed out, the extent of the
strip stock advanced to the cut-off station upon each
cycle of machine operation can be adjusted so that the
length of the cut fastener will match the nominal diam
eter of a particular twisted casing neck. This feature,
together with the convenient means for adjusting the
10 spacing between the dies results in a circular band tightly
As the lower
applied to the casing neck. Preferably, the length of
die continues its upward movement, the ?ngers 135, 135’
the fastener is such that the ends thereof will be brought
into abutting relation although the machine will operate
equally well to produce a circular fastener wherein the
stock constitutes an individual fastener.
remain in the overlying position relative to the severed
portion of the strip thereby forming, for the time being,
a ?xed stop centrally disposed with respect to the ends of 15 ends overlap slightly. Aluminum strip, approximately
the severed portion of the strip. Consequently, further
one-quarter hard, having a thickness of approximately
upward movement of the die 126 forces the ends of the
0.035" and a width of approximately 0.250", is satisfac
tory for making fasteners suitable for sealing a large
variety of flexible bags, casings, etc.
provided with a concave recess for this purpose (see par 20
In our co-pending United States patent application
ticularly FIGURE 22) .
filed July 18, 1960, Serial Number 43,357 and entitled,
FIGURES 16 and 19, the latter being a vertical cross—
“Fastener For Flexible Containers,” there is disclosed
sectional view taken along the line XIX——XIX of FIG
a strip fastener having a novel con?guration and which is
URE 146, illustrate the intermediate position of the lower
made from pre-formed strip stock. Speci?cally, one sur
die, that is, at that point wherein the severed portion of
face of the strip stock is provided with a recessed area
the strip 39 is formed into the U-shape. It will be noted
as, for example, one or more channels running length;
that such U-shaped piece is still spaced from the casing
wise of the strip stock. When such fastener is applied
neck at this point in the operating cycle of the machine.
to a casing neck, the channels lie in planes normal to
At this ‘point, the sloping surfaces 140, 140' (see FIGURE
the bag axis and are ?lled by the casing material. Such
19) formed in the lower die, are in initial engagement with 30 self-gripping action of the fastener is of particular ap
the respective detents 139, 139’ of’ the triangular members
plicability to containers made of inherently slippery mate
134, 134'. It is apparent that further upward movement
rial as certain plastics, natural animal casings, etc,, or
of the lower die results in a wedging action thereby spread
for use in containers wherein the contents are packed
severed strip upwardly to thereby form a substantially
U-shaped member, the upper surface of the die 126 being
the triangular members outwardly a distance such that
under pressure. FIGURE 23 is a central, cross-sectional
the ?ngers 135, 135' are removed from the path of travel 35 view showing a fastener 169 of this type, applied to the
of the die and,'o? course, clear of the now U-shaped
gathered neck of a casing 161. In this case, the strip
stock is preformed with rounded corners and with two
fastener.
r
- FIGURES 17 and 20, the latter being a vertical, cross
longitudinally-extending channels formed in one sur
sectional view taken along the line XX-U of FIGURE
face. When the end of the strip stock is severed and
1-7, show the lower die at its upper limit of travel, that is, 40 applied to the casing neck by the machine herein de
the ‘position wherein the dies are fully closed. The
scribed, the channels lie in planes normal to the neck axis
spread-apart disposition of the ?ngers 135, 135' is best‘
and are ?lled With the casing material, whereby the fasi
shown in FIGURE 20.
As the lower die moves to the
tenor cannot become loose due to handling and cannot
die-closed vposition, it carries the U-shaped fastener toward
slide along the casing neck under the influence of the
the mating surface of the upper, relatively-?xed die 125 45 pressure applied thereto by the encased products such as,‘
having a complementary semi-circular recess formed in
for example, a compacted meat product packaged under
the operating end, see FIGURE 22. The» ends of the
relatively high ' pressure conditions.
U-shaped fastener ?rst enter the recess in the upper die 125
The formation of a flat strip fastener and application
and are thereby bowed toward each other along the arc
thereof to the casing does not involve a crimping, dirn
of a circle. After the ends of the U~shaped fastener have
pling or mechanical locking operation thereby reducing
been forced into sliding engagement with the circular wall
to a minimum the possibility of puncturing the casing
of the upper die, the center of the fastener‘ comes into con
material either during the fastener-applying operation or
tact with the casing neck and the‘ ‘neckis raised slightly.
subsequent rough'handiing of the ?nished product. In
However, the arrangement is such that the raising of the
casingneck occurs simultaneously with'the ?nal formation
of the fastener into a circular-band with the fastener ends
preferably in abutting relation. During the ?nal action
asmuch as the individual fasteners are cut from pre
formed stock there is no wastage of material and the user
is spared. the cost and inconvenience of carrying a large
inventory of different size fasteners. The machine is
portable and can be used without modi?cation, with equal
facility by right-handed or left-handed operators.
of the dies, the ends of the spring-biased slides 154, 154i’
preventuundesirable expansion of ‘the casing neck in‘the
immediate vicinity of the dies, which expansion might 60 Having now given a detailed description of the con
possibly result in the ends of the fastener pinching the
struction and operation of the machine, various changes
casing material as the fastener ends were brought into
abutting relation. The ?nal result is a neat, circular band
and modi?cations will readily occur to those skilled in
this art. Such changes and modi?cations can be made
tightly applied to the casing neck. Removal of the casing,
without departing from the spirit and scope of the inven
having the fastener applied thereto, from the machine is 65 tion as recited in the following claims.
accomplished by merely withdrawing same along the slot
We claim:
15, see FIGURE 1, the guideway 16, of increased width,
1. A machine for applying a metal fastener to the
accommodating the circular band fastener. It is again
gathered neck of a flexible container comprising a
pointed out, however, that the machine operates cyclically.
Movement of the trip ?nger, upon insertion of the bag
neck into the fastener-applying station, automatically
mounting plate having a die channel formed therein;
upper and lower co-acting dies slidably received in said
starts the machine whereby the dies are moved continu
mounting plate which slot terminates in an enlarged
substantially circular receiving opening having an axis
die channel; means forming an entrance slot in said
ously from the normally-open position shown in FIG
URES 15 and 18, to the normally-closed position shown
normal to the said die channel and intermediate of the
in FIGURES 17 and 19, and back to the normally-open 75 co-acting ends of the dies; a ?rst adjusting means me
3,076,970
16’
chanically coupled’ to the upper die to set the form
ing surface of the die to a predetermined position rela
tive' to the axis of the receiving opening; drive means
axially aligned with the dies- and mechanically
coupled only to the lower die for advancing the lower
die relative to the upper die from a die-open to a die
closed position; control means associated with the said
said power-control means is a valve connecting the drive.
means to a source of air under pressure.
‘ _
4. The invention as recited in claim 3, wherein the
said linkage mechanism comprises‘ a rotatable vertical
rod having a bifurcated end carrying a pin;,lmean's pi'vg
otally securing the said control means intermediate ofithe
ends of said vertical rod; a horizontally-disposed end,
receiving opening and de?ectable by the gathered neck
having one end secured to the said power-control means
and the other end extending in spaced relation to the said
ing opening; spring-biased means slidable along opposite 10 piston rod; means forming a notch in the said horizon
of a container when the latter is inserted into the receiv
surfaces of the upper die and extending into the said re- '
tally-disposed member which notch normally hasjthe
ceiving opening for engagement by the container neck; a
power-control means operable from Off to On position
said pin disposed therein for movementof the said valve
to the On position upon de?ection of the said control
means; spring means normally biasing the- said hori
to connect the said power means to a source of power;
a linkage mechanism connected between the said control 15 zontally-disposed rod in- a direction to move the said valve? .
to the O?" position; and means carried by the said piston
means and the said power-control means causing move
ment of the power-control means to the On position
rod for sliding engagement with the said other‘ endhof;
the horizontally-disposed, rod to thereby disengage the
upon de?ection of the said control means; a supply spool
rotatably carried by the mounting plate and carrying a
said pin from the said notch when the pistonrod reaches,
continuous length of strip stock; feed means operable by 20 its upper limit of movement.
’ _
I‘ ‘ >
, ,
5. In a fastener applying machine of the type compris5
the drive means for advancing the end of the strip stock
ing a pair of axially~spaced, cooperating dies relatively
to a- strip severing position over the operating end of the
lower die when the dies are in open position; a second
adjusting means associated with the feed means for pre
movable in a die channel from an open position ,toa
closed position thereby to form a ?at strip fastener into‘
setting the length of the strip stock advanced to the strip 25 a circular band, means forming an entrance‘ slot ter
minating in a receiving opening transversely intersecting
severing position upon operation of the feed means; a
the die channel intermediate of the co-acting surfaces oi
pair of spring-material members carried by the mount
ing plate and disposed on opposite faces of the lower
theudies, and power means for effecting, closure of the,
dies thereby to apply the fastener as‘an encirclingiband
die, each such’ member having inwardly-extending ?ngers
normally overlying the forward end of- the strip stock 30 around the gathered container neckpositioned‘inv the
receiving opening; the improvement wherein; the ‘power
and extending into the path of, travelv of the lower die;
means is an air cylinder having a, piston rod axially
cooperating means between each of said spring-material
aligned with the said dies and mechanically coupled-only
members and the lower die to spread the said ?ngers
to one of the dies, and including manually-adjustable
outwardly, out of the path of travel of the lower die upon
a predetermined upward movement of the die; means co 35 means mechanically coupled to the other diethereby to,
set the forming surface of the die to ajprcdetermined
operating with an upper edge of the lower die for sever
position relative to the axis of the said receiving opening;
ing the strip stock upon a predetermined upward move
6. The improvement as recited in claim .5, ‘wherein
ment of the die and prior to the spreading out of the
the said receiving opening is substantially circular and of
said ?ngers; forming means in the lower die and co
operating with the said ?ngers to form the severed por 40 larger size than the said entrance‘ slot, and including
spring-biased means slidable along, opposite surfaces of
tion of the strip stock into a substantially U-shape prior
the said other die and extending into the receiving open
to the spreading out of the said ?ngers; forming means
ing for engagement by the container neclg. I _
_
in the upper die and co-acting with the forming means
7. The improvement as recited in claim_6,' wherein
of the lower die to form the severed portion of the strip
stock as a substantially circular band around the casing 45 the central portion of the ‘walls forming saidentrancc
slot are provided with reversely-disposed‘ grooves jform:v
neck when the dies are in the closed position; means
ing a central channel extending the length of the en
trance slot and communicating with the receiving 'open-‘
said power-control means to the OE position when the
>
dies reach the fully-closed position; and means effective 50 mg.
upon operation of the said power-control means to the
including the said linkage mechanism for operating the
Off position to drive the said power means in the reverse
References Cited in the tile of this patent
direction to thereby return the dies to the open position.
UNITED STATES PATENTS’
2. The invention as recited in claim 1, including means
operatively associated with the said linkage mechanism 5
for retaining the said power-control means in the Off
position until the container neck is removed from the
,
2,403,947
Oussani _; ___________ __ July 16,1946
2,839,753
Reed ___v_a_- _______ __,___ June 24, 195-8
2,886,816
Hill _r_-___> ________ _,__._._May 19, 1959
768,490
Great Britain __;. ______ _- Feb. 20, 1957
said receiving opening.
3. The invention as recited in claim 1, wherein the
said drive means is an air-operated piston rod and the
FOREIGN‘PATENT?
._
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