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Патент USA US2107963

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Feb. @, 1938.
v, L, STATHEM
2,107,963
SACK SEWING APPARATUS
Filed May 9, 1936
5%
6 Sheets-Sheet l
O
Fab. 8, 1938.
v. L. STATHEM
2,107,963
SACK SEWING APPARATUS
Filed May 9, 1936
6 Sheets-Sheet 2
r
5%
mm“;
Feb. s, 1938.
'
v, L, STATHEM
2,107,963
SACK SEWING APPARATUS
Filed May 9, 1936
v
6 Sheets-Sheet 3
3.?
Sum/mm;
Feb. 8, 1938.
V.‘ L. STATH EM
2,107,963
SACK SEWING APPARATUS
Filed May 9, 1936
6 Sheets~Sheet 4
1%.(5.
F?b. 8, 1938.
v. L. STATHEM
2,10'7,963
SACK SEWING APPARATUS
Filed May 9, 1936
r72 7.”
4/
318
6 Sheets~Sheet 5‘
11%h. 8, 1938.
v. L. STATHEM
SACK SEWING APPARATUS
Filed May 9, 1936
6 Sheets-Sheet 6
Patented Feb. 8, 1938
‘
UNITED STATES PATENT OFFICE
2,107,963
SACK SEWING APPARATUS
Vereau L. Stathem, Riverclale, Calif.
Application May 9, 1936, Serial No. 78,950
18 Claims.
10
15
29
25
This invention relates to a sack sewing apparatus intended to sew the mouth of a ?lled sack.
An object of the invention is to provide an apparatus of this kind comprising a sewing head
together with a plurality of sack holders each
mounted upon a carriage with all of the carriages
positioned upon a turntable whereby while one
sack is ?lling, a ?lled sack is properly presented
to a sewing head for closing said ?lled sack.
Another object of the invention is to provide
an apparatus of this kind comprising a ?lling station and a sewing station together with an intermediate turntable and a plurality of carriages
mounted upon the turntable with a sack holding
mechanism supported upon each of the carriages,
said carriage being so arranged upon the turntable that a sack supported by one of the
carriages is in a position to be ?lled while the
second carriage is being caused to move with
respect to the sewing station to sew the mouth of
a ?lled sack.
An additional object of the invention is to provide an apparatus of this kind wherein is pmvided a sewing head together with means for
moving a ?lled sack with respect to the head for
closing the sack and means for automatically
Figure 2 is a view in top plan of the structure
illustrated in Figure 1;
Figure 3 is an enlarged detailed sectional view
illustrating the means as herein employed for
holding the turntable against movement;
Figure 4 is a longitudinal medial Vertical sec
ilional View taken through the structure.
Figure 5 is an enlarged transverse sectional
View taken Substantially 0n the line 5—~5 of Fig
ure 1;
Figure 6 is an enlarged fragmentary vertical
sectional view taken longitudinally through the
delivery end portion of the apparatus showing
various positions of certain of the parts after the
sack has been sewed;
'
Figure 7 is a detailed elevational view of the
thread cutting knife as herein embodied;
Figure 8 is a detailed sectional view of the
sack holding and throw off lever as herein com
prised;
.
.
Figure 9 is an enlarged fragmentary vertical
sectional view taken through the central portion
of the platform with parts in elevation and illustrating in detail the mounting for the platform;
Figure 10 is a fragmentary horizontal sectional
view taken substantially on the line Iii-l0 of
throwing off the ?lled sack after being sewed.
Figure 9;
A still further object of the invention is to
provide a ?lled sack sewingmechanism wherein
99 is provided a carriage for carrying a ?lled sack
and presenting the same to the stitching mechanism and wherein power means is provided to
35
Ill}
45
50
55
(Cl. 112-11)
2
Figure 11 is a fragmentary detailed sectional
view illustrating one of the supporting springs
for the sack floor mounted on each of the car- a
riages;
Figure 12 is a fragmentary top plan view of the
effect such travel of the carriage.
sack holding means.
The invention also contemplates for an object
to provide an apparatus of this kind which in~
eludes means for effectively cutting the thread
after a filled sack has been sewed.
The invention consists in the details of construction and in the combination and arrangemerit of the several parts of my improved sack
sewing apparatus whereby certain important advantages are attained and the device rendered
simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.
The novel features of my invention will hereinafter be de?nitely claimed.
In order that my invention may be the better
understood, I will now proceed to describe the
same with reference to the accompanying drawings, wherein:-—
Figure l is a view in side elevation and of somewhat a diagrammatic character illustrating a
sack sewing apparatus constructed in accordance
with an embodiment of my invention;
As disclosed in the accompanying drawings
and particularly Figures 4 and 9, B denotes a base
structure which may be constructed in any man
ner preferred and which has bolted, as at l, or
otherwise ?rmly mounted thereon a foot plate 2
which supports a stationary column 3. The
lower portion of this column is larger in diameter
than the upper portion to provide an annular
shoulder 4 forming a support for an inner collar
5 constituting a wear and thrust bearing. Snug
ly surrounding this collar 5 is an outer collar 6
and interposed between the collars 5 and 6 are
the anti-friction members 1.
The outer collar 6 is snugly received within
the lower portion of a tubular shaft 8. This
shaft 8 is of a length to terminate closely adja~
cent to the upper end of the stationary column
3. The upper portion of the shaft 8 has welded
or otherwise rigidly secured therein an annular
member 9 which provides a shoulder upon which
rests the outer collar ‘ID of a second combined
wear and thrust bearing. This collar in sub
.
2
2,107,963
stantially snugly surrounds an inner collar H
said housing.
which rests upon an annular shoulder l2 carried
plate 26 is provided with a suitably positioned
opening 34 through which the shafts 3 and 8
and the sleeve [9 freely pass, said opening 34
by and surrounding the column 3 at a point close
ly adjacent its top. This shoulder I2 is prefer
ably formed by again reducing the diameter of
the shaft 3. The top of the shaft 3 has engaged
thereon a nut or other holding member 14 co
acting with a washer l5. This washer l5 over
lies the inner collar II to assure the same being
10 maintained in applied position. Between the
collars l0 and H are interposed the anti-friction
members l6 herein disclosed as balls and which
may, of course, be of a different character if re
quired.
15
Resting on the upper end of the tubular shaft
8 is an end portion of an expansion spring 11,
the opposite end of which bearing against a plate
l8 intersecting the upper portion of an elongated
sleeve is. This sleeve l9 ?ts on and telescopes
upon the tubular shaft 8 but is free to have
movement lengthwise thereof. The purpose of
the spring I‘! is to constantly urge the sleeve l9
upwardly, said sleeve being of a predetermined
tension for a purpose to be later explained.
25
The shafts 3 and 8 are disposed centrally
through a transverse channel beam 20 comprised
in the structure of a platform P (see Figures 4
and 9). This platform P is positioned closely
adjacent to' the lower end of the tubular shaft
30 8 and is welded, as at 2|, or otherwise rigidly
secured thereto so that the platform P is effec
tively supported for turning or rotating :move
ment with the shaft 8. The anti-friction mount
ing of the shaft 8 permits the platform to be
initially turned or rotated with a minimum of
effort. While in the present embodiment of my
invention the platform is intended to be manu
ally turned or swung, it is to be understood that
it is within the scope of my invention to provide
mechanical means for the same purpose. How
ever, as any particular means for turning or
swinging the platform does not constitute a par
ticular part of the present invention an illustra
tion and description of any such mechanical
means is believed to be unnecessary.
The transverse channel beam 20 is disposed
between and suitably connected to» the central
portions of the longitudinally disposed side angle
beams 22 comprised in the structured the plat
50 form, said channel beam 20 constituting the sole
support for the beams 22.
" V ,
.
Welded or otherwise secured to the beams 22
at opposite sides but in close proximity to the
transverse beam 20 are the upstanding angle
55 irons 23. The upper ends of adjacent posts 23.
are connected by the horizontally disposed angle
bars 24. Welded or otherwise secured to the
posts 23 are the side plates 25 and suitably se
cured to the bars 24 is a top plate 26. These
(30 posts 23 and bars 24 together with the plates 25
and 26 provide a housing to prevent foreign mat
ter, such as dust and the like, interfering with
the lower mounting of the shaft 8. Each pair
of corner posts 23 at a predetermined distance
65 below their upper ends have interposed therebe
tween and suitably connected thereto the angle
bars 21. The two bars 21 support the parallel
angle bars 28. These bars 28 adjacent each end
portion are provided with a pair‘of transversely
aligned bearings 29 for a shaft 30 and carrying
The central portion of the top
being also of a su?icient diameter to‘ permit un
obstructed passage therethrough of the vertical
stretches of the cable 32. This cable 32 is dis
posed over and around a pulley 35 rotatably sup
ported by the upper end portion of the sleeve I9
above the partition l3. Each extremity of the 1O
cable 32 is suitably anchored, as at 36, to the
inner end portion of a carriage 31 (see Fig. 4).
The cable 32 is of a length dependent upon the
extent of travel desired for each of the carriages
31 in a direction away from the shaft 3.
Each of the carriages 31 is provided with wheels
38 of a conventional type and mounting and
which ride upon tracks: 39 extending lengthwise
along the beams 22 of the platform P at opposite
sides of the central housing. These tracks 38
extend to the outer ends of the beams 22 and
each of said tracks is adapted to be alternately
brought into proper alignment with the tracks
39' suitably supported upon a stationary plat
form P’ or other suitable support. This is shown
in Figures 4 and 6.
Each of the carriages 31 carries a yieldably
supported floor 40 for coaction with a sack. De
pending from the corner portions of the ?oor 4a’)
are the bolts 4!.
These bolts 4i are ?xedly se
3O
cured to the ?oor 4!] and are of substantial length.
These shanks 4! are freely disposed through the
floor 42 of the carriage 37 and mounted upon
said shanks 4| below the floor 42 are the nuts
43 for limiting the upward movement of the
?oor 40 with respect to the floor 42. Interposed
between the floor 40 and the floor 42 are the
coil springs encircling the shanks 4!.
These
springs 44 are of a tension to normally hold the
?oor 42 at the limit of its raised position and 40
to materially resist the weight of a sack and its
contents.
The rear or inner bolts 4i have dis
posed therethrough at desired locations the stop
pins 45 (see Figure 11) which will stop the down
ward movement of said rear shanks 4i so that 45
the forward or outer shanks 4| as they continue
downwardly under the Weight of the sack and
its contents received upon the ?oor 45 will allow
the ?oor 40 to have a downward tilting position
as illustrated in Figure 6 to facilitate the throw 50
off of the ?lled sack thereon.
The inner or rear‘ end portion of the ?oor 49
is provided with an upstanding back wall 46
of a height to extend a considerable distance
above of the ?lled sack on the ?oor 40. This wall
46 materially facilitates the desired throwing off
of the sack.
The outer end portion of each of the carriages
31 at substantially its medial plane has pivotally
engaged therewith an elongated depending pawl 60
41. This pawl 41 is normally urged and main
tained in a raised position by a retractile mem
ber 48 herein disclosed as a coil spring, one end
portion of which is suitably anchored, as at 49, to
the pawl 4'! and the opposite end portion secured, 65
as at 50, to a desired part of the carriage 31.
Partially underlying the stationary platform P’
and also extending below the end portion of the
platform P adjacent to the platform P’ is an end
less member 5l, herein disclosed as a chain pass
70
a pulley 3|.
Passing under the pulleys 3| is a ?exible mem
ber or cable 32, the end platesv 25 of the housing
ing around the suitably positioned and supported
sprocket wheels 52. The sprocket 52 in the pres
being provided with suitably positioned openings
platform P constitutes the drive sprocket and its
shaft 53 is adapted to be coupled with any suit~ 75
33 for the passage of said cable outwardly from
ent embodiment of my invention remote from the
3
2,107,963
able source of power, as for instance, a motor M.
The endless chain 5| is disposed in a direction
lengthwise of the rails 39’ and positioned sub
stantially midway thereof so that the outstanding
lugs 54 carried at spaced points along the chain
5! may have proper contact with the pawl ill to
cause the carriage 31 to travel from its inner po
sition upon the platform P outwardly upon the
platform P’ and for a distance su?icient to carry
10 the upper portion of the sack supported by the
carriage through the head H of a sewing machine,
indicated in Figure l and shown more in detail in
Figure 5. Normally the pawl 4‘! is in its raised
position and above the path of travel of the up
standing lugs 54. However, when it is desired to
have a carriage 31 move outwardly to effect the
required sewing operation the operator pulls -a
lever 55 extending upwardly from a side beam 22
of the platform P. This lever 55 is loosely mount
20 ed on an end portion of a shaft 56 disposed trans
versely cf the platform P and rotatably supported
by the side beams 22 thereof. There is one of
these shafts 55 carrying a lever at each end por
tion of the platform P and each lever 55 is adapted
25 to rock the shaft 55 remote therefrom and for
which purpose the shaft 56 at a desired point
thereon has pivotally engaged therewith, as at
5?, an end of a connecting rod 58. The opposite
end of this rod or link 58 is operatively con
30' nected, as at 59, with a crank arm 60 provided at
an end portion of the shaft 55 remote from the
lever 55. This crank arm 60 is at the end portion
of the shaft 55‘ remote from the extremity upon
which is mounted the second lever 55. It will,
7- therefore, be self-evident that the levers 55 are
at opposite sides of the platform P but at the time
of
willdesired
be at the
manipulation
desired side
each
of of
thesaid
platform
levers for
convenient working by the operator.
40
The normal raised position of each of the pawls
57 under the action of a spring 48 is limited by
the'pin A of a crank 6| formed in the middle por
tion of a shaft 56, and when lever 35 is in an ap
proximately vertical position, the crank 5i will
45 extend upward and rearward.
Normally the carriages 31 are positioned en
tirely upon the platform P under the action of the
spring H which constantly urges the sleeve 95
upwardly with the result that required pull is
50 imposed upon the flexible member or cable 32 to
cause the carriages 31 to abut the end walls 25.
The inner end portion of each of the carriages
31 at substantially its transverse center is pro—
vided with a post 68 having braces 69. .The upper
55 end portion of the post 68 has ?rmly secured
thereto an end portion of a beam ll] which ex
tends outwardly with respect to the adjacent
carriage in a direction lengthwise thereof. This
beam ‘is is of a length best required.
This beam 15 provides a support for a sack
60
holding mechanism X which is of the detailed
character disclosed in the patent granted to me
on May 4, 1937, No. 2,079,132, said mechanism
being of such character that it will support the
mouth of a sack open for ?lling and then tightly
close the open end of the sack and holds it closed
in such position that as the ?lled sack passes
through the sewing head the mouth of the sack
will be effectively stitched. This sack holder
70 holds the mouth of the bag open and, as illus
trated in the accompanying drawings, a contact
1 l is provided for engagement with a release lever
12 comprised in the sack holding mechanism
whereby said mechanism is permitted to return to
75 its normally open adjustment and the ?lled sack
engaged therewith to drop therefrom upon the
floor 46.
This contact ‘H as herein disclosed is
operatively supported in required position from
a vertical frame T positioned to one side of the
inner or receiving end of the platform P’. rfhe
sewing head H is secured to the upper portion of
this frame T and the sewing mechanism com
prised in the sewing head H is of a conventional
type used in sack sewing and is driven from a
shaft 73. As herein disclosed this shaft 73 is in 10
driven connection through the medium of a belt
‘M with a pulley ‘l5 freely mounted on a shaft ‘it
rotatably supported by the frame T.
This shaft 16 is in driven connection through
the sprocket chain T! with the drive shaft 53
hereinbefore referred to. This shaft 16 can, how
ever, be driven otherwise if preferred.
Coacting with the pulley l5 and as shown in
Figure 5 is a sliding clutch disk 18 mounted upon
the shaft ‘it for rotation therewith but movable 20
into or out of clutching engagement with the pul
ley 15. This clutch disk 18 may include, as is well
known, a spring for normally maintaining de~
clutching position but, as illustrated in Figure 5
of the accompanying drawings, the disk '38 is nor— 25
mally held in released position through the me
dium of a retractile spring 19 secured, as at 8%], to
the operating lever ill for the clutch disk 18 and to
a part 82 depending from the sewing head H.
The lever 8| in the present embodiment of my in~ 30
vention is pivotally connected, as at 83, to a part
of the frame and at a desired point above the
shaft '15, and the intermediate portion of this
lever 8! is operatively engaged, as at 84, in a well
known manner with the movable clutch member
18.
The lower end portion of the lever 81 has con
stantly in engagement therewith a roller 85 ro
tatably carried by the upstanding arm 56 of a bell
crank lever. The heel portion of the bell crank 40
lever is pivotally mounted, as at 87, on the frame
T with the second or lower arm 88 of the lever
disposed in a general direction toward the plat~
form P’. The arm 85 has engaged therewith a
spring which serves to maintain the roller 35 in 4*
desired constant contact with the lower portion
of the lever B! but not with sufficient pressure to
cause any shifting of the lever. The tension of
the spring fill is considerably less than the tension
of the spring 19.
(ll)
While in the accompanying drawings I am
showing the use of a spring ‘59 for normally main~
taining the clutch member 15 in declutching po~
sition. I wish it to be understood that there can
be used any type of clutch having in its own
structure a spring of desired strength and by
referring to the spring 19 it is to be understood
that I have in mind any other means which can
be employed with advantage for maintaining this
normal position of the clutch disk 18,
60
The arm 88 is of a length to lap or overlie either
from above or below a side marginal portion of
the floor it?! of each of the carriages 3i’ and the
outer or free end portion of this arm flél carries
a roller 9:? for such direct contact. The normal
position of the arm 88 is such to cause the roller
55 to engage the ?oor ll'li of a carriage 3? from
below but as a carriage Bl is moved from the
tracks Sit‘ outwardly of the platform P upon the
tracks
a. downwardly and outwardly inclined 70
cam surface or track 9| (shown in Figure 1)
carried by the outer end of a carriage 3“! at one
side thereof will engage the roller {ill from below
resulting in an upward swinging movement of the
arm 58 and a simultaneous outward swinging ‘
4
2,107,968
movement of the arm 86 against the lever 8|.
This action will cause the clutch member 18 to
engage with the pulley ‘E5 to make the sack sew
the thread and thus eliminate undue waste of
thread.
ing apparatus active whereby as the carriage 37
continues to travel outwardly the upper portion
of the sack will be caused to travel through the
head H and suitably stitched.
ly engaged therewith a rigid link I05 which in
turn is operatively engaged with an upstanding
lever [06. This lever E96 is pivotally mounted
upon the beam 75] and is positioned for contact
by a trip member I 97 extending laterally from an
elongated bar {98 herein disclosed as extending
from the casing of the head H. The stop ‘if 10
hereinbefore referred to depends from the rear
end portion of this bar I06.
The carriages 31 at suitable points thereon have
Just after the sack passes free of the needle or
has been completely stitched, the roller ‘.99 will
10 pass off the cam'?l, the spring 79 will pull the
lever 88 in a direction t0 declutch the member 18
and at the same time swing the arm 88 down
wardly. This operation is permitted by recess
92 (see Figure 2) provided in the adjacent mar
\ ginal portion of the ?oor 42 and ‘suitably spaced
inwardly of the cam track 9i.
It is to be understood that the distance between
the cam track SH and the notch or recess 92 de~
termines during what period of outward travel of
the carriage 31 the sewing mechanism of the head
H will operate and for which reason it is important
that such distance exceed the width of the ?lled
sack.
After the ?lled sack has been sewed the stop
‘H hereinbefore referred to, just before the work
ing pawl 41 is released, will contact the lever '52
of the sack holding apparatus to allow the sewed
sack to drop down upon the ?oor it. The weight
of the ?lled sack will tilt the ?oor iii) downwardly
3O and rearwardly and in most instances this'action
will cause the ?lled sack to be thrown off of the
?oor and which operation is further facilitated by
the sudden tilting of the rear or back wall 66.
However, should the sack not throw off quickly,
then as the carriage starts to return, the ?lled
sack will come into contact with a throw off bar
as. This bar 94 is horizontally disposed and has
its forward end portion pivotally connected, as at
This arm I03 as herein disclosed has operative
depending therefrom the rigid straps Hi9, each
having at its lower portion a laterally disposed 15
lug to engage below the side beams 22 of the
platform P or the side beams 22’ of the platform
P’. These straps provide means to assure the
carriages being maintained against displace
ment upon the rails 39 or 39’.
20
The general operation of this mechanism is as
follows: The operator stands at the right in
Figures 1 and 4. An empty sack is placed on the
adjacent ?oor til with the mouth of the sack being
held open by the sack holder mechanism desig 25
nated generally X, which is fully shown and de
scribed in my copending application, Ser. No.
78,952, ?led of even date herewith.
The sack
holder includes two axially rotatable jaws held
from axial rotation by bolts, the bolts being re 30
leased by a trip lever.
When the bolts are re
leased, the weight of the ?lled sack causes the
jaws to turn downward, releasing the sack which
permits all of the weight of the sack to be sup
ported by the ?oor 40.
35
Assuming that a sack supported on the holder
X, at the left hand side of the machine, as shown
in Figure 1, has been ?lled, the operator releases
95, to a suitably positioned support 96 preferably
latch 63 (see Figure 3) and rotates the platform
arranged at the side of the platform P remote
from the frame T. This bar 94 is constantly
swung into a position to intersect the path of
travel of the sack carried by the sack holding
apparatus and is maintained in such position by
P or turntable to carry the corresponding car
the expansible spring 9i interposed between the
bar Q4 and the suport 9h, The spring 9?, as illus
trated in Figure 8, encircles a bolt 98 pivotally
connected, as at 99, to the bar 94 but having free
sliding movement through the support 8%, The
normal position of the bar 94 under the action
of the spring 9? is determined by adjustment of
the nut I05 threaded upon the outer end por
tion of the rod 98 for contact with the outer face
of the support 95.
This bar 94 will readily swing inwardly as the
carriage with the ?lled sack passes on the plat
form P’ but will spring out to a position to engage
the sack and stop the sack should the sack re
main on the carriage 3? as said carriage travels
back upon the platform P. This contact of the
bar 96 will assure the throwing off of the ?lled
sack.
Just after the ?lled sack passes through the
sewing head H it is, of course, important that the
sewing thread be severed. As herein disclosed,
this is done by a blade it! (Figures 6 and 7) hav
ing a cutting edge E62 in the form of an inverted
V. The blade It! is carried by an end portion of
a vertically swinging arm E83 pivotally connected,
70 as at I54, to the supporting beam “it closely ad
jacent its connection with the post 58. This arm
103 extends in a direction toward the outer or
free end of the beam 'l?l so that as it is swung
downwardly to sever a thread it will operate in
76 a direction opposite to the direction of travel of
riage with its ?lled sack into alinement with
platform P’, as shown in Figure 4. The operator
then pulls the adjacent lever 55, which causes a
depression of the pawl 41 of the carriage having
the ?lled sack into the path of movement of one
of the lugs 55. At this time, the carriage, which
is now at the right hand in Figure 2, is bearing
against the end wall 25 of housing 23. As the
loaded carriage on platform P rolls toward and
onto platform P’, the spring I7 will be com
pressed to permit the cable 32 to pay out toward
the left in Figure 4.
The upper end of the bag or sack with its
mouth still engaged by the jaws of the bag holder
X will pass into the sewing head E and as the
forward upper corner of the sack enters the sew
ing head H, the cam 9| of the advancing car
55
riage engages the roller 96, causing the clutch T8
to be thrown in, thus starting the sewing ma
chine. When the bag has been fully sewed, the 60
thread is cut by the knife liil, the member ‘H,
Figure 6, will trip the latch 12, which will release
the axially rotative jaws of the holder X, releas
ing the sack and the whole weight of the sack
will drop onto the bag supporting ?oor 56. This 65
will tilt the floor to the position shown in Figure 6
and usually throw off the sack.
As soon as the
lug 55 has passed out of engagement with pawl
G1, the spring H will draw the emptied carriage
back onto the platform P. If the bag should re 70
main on the ?oor it, the member 94 will dislodge
it from its position and throw it off as the car
riage moves from platform P’ to platform P.
Thus when the sack on platform P’ has been
sewed and the sack on the right hand side of 15
2,107,963
platform P has been ?lled, the operator again
throws lever 55 adjacent to his station, which
lowers the pawl 41 of the carriage at the ?lling
station. He then rotates the turntable to- bring
the newly ?lled bag into position opposite the
platform P’ and the empty carriage to the ?lling
station and repeats the operation.
It will be seen with this construction that the
?lling and the sewing of sacks is almost a con
10 tinuous operation; that a ?lled sack does not
have to be carried manually from one station to
the other, and that each ?lled sack is properly
positioned for sewing and is then discharged
automatically.
15
From the foregoing description it is thought
to be obvious that a sack sewing apparatus con
structed in accordance with my invention is
particularly well adapted for use by reason of
the convenience and facility with which it may
be assembled and operated, and it will also be
obvious that my invention is susceptible of some
change and modi?cation without departing from
the principles and spirit'thereof and for this
reason I do» not wish to be understood as limiting
myself to the precise arrangement and forma
tion of the several parts herein shown in carry
ing out my invention in practice except as here
inafter claimed.
I claim:
30
1. A ?lled sack sewing apparatus comprising a
sewing means, a carriage movable rectilinearly
in a path at one end adjacent to the sewing
means, means for urging the carriage in a direc
tion away from the sewing means, a sack sup
porting means mounted upon the carriage con
structed and arranged to hold closed the mouth
portion of a ?lled sack, said carriage as it moves
in a direction toward the sewing means carry
ing the ?lled sack beyond the sewing means to
.40 permit stitching of the closed mouth of the sack,
and power means for moving the carriage to
ward the sewing means and manually operable
means for connecting the carriage with the power
operated means to shift the carriage into co
45 active relation to the sewing means, and means
acting automatically to release the connection
between the power operated means and the car
riage upon the completion of the sewing opera
tion to thereby permit the return of the carriage
50 under the action of the urging means.
2.. A ?lled sack sewing apparatus comprising a
sewing means, a carriage movable in a rectilinear
path into coactive relation to the sewing means
'“ or away therefrom, means for normally urging
55 the carriage to a position away from the sewing
means, a sack supporting means mounted upon
the carriage constructed and arranged to hold
closed the mouth portion of a ?lled sack, means
for moving the carriage into operative engage
60 ment with the sewing means and beyond the
sewing means to permit stitching of the closed
mouth of the sack, said last named means be
coming ineffective when the carriage has travelled
a distance su?icient to carry the ?lled sack be
65 yond the sewing means, said urging means then
acting to reverse the direction of movement of
the carriage- and return it to its initial position.
3. An apparatus of the class described com—
prising a rectilinearly movable carriage, an end
70 less member separate from but having a ?ight
travelling constantly in the same general direc
tion as the direction of travel of the carriage,
enacting means carried by the endless member
and the carriage for moving the carriage a pre
75 determined distance in one direction, means for
5
supporting a ?lled sack on the carriage, and
means for stitching the mouth of the sack as the
carriage is moved by the endless member.
4. An apparatus of the class described compris
ing a rectilinearly movable carriage, an endless C1
member travelling in the same general direction
as the direction of travel of the carriage, a mov
able pawl mounted on the carriage, a log carried
by the endless member to engage the pawl when ‘
in one position to cause the carriage to travel l0
in one direction, manually operable means to de~
press the pawl into the path of movement of the
lug, means for supporting a ?lled sack on a car
riage, and means ‘for stitching the mouth of the
sack as the carriage is moved by the endless
member.
5. An apparatus of the class described com
prising a carriage, an endless member travelling
in the same general direction as the direction of
travel of the carriage, a movable pawl carried by
the carriage, a lug carried by the endless member
to engage the pawl when in one position to cause
the carriage to travel in one direction, means for
supporting a ?lled sack on a carriage, means for
stitching the mouth of the sack as the carriage is
moved by the endless member, and means for
normally holding the pawl in a second position
free of the lug of the endless member.
6. An apparatus of the class described com
prising a carriage, an endless member travelling ‘
in the same general direction as the direction of
travel of the carriage, a movable pawl carried by
the carriage, a lug carried by the endless member
to engage the pawl when in one position to cause
the carriage to travel in one direction, means for
supporting a. ?lled sack on a carriage, means for
stitching the mouth of the sack as the carriage is
moved by the endless member, means for normal
:1
ly holding the pawl in a second position free of
the lug of the endless member, and means for
moving the pawl into its position to be engaged
by the lug.
7. A sack sewing mechanism, including a
turntable having a floor and having diametrically
extending tracks on the ?oor on each side of
the rotative center of the table, a pair of sack
supporting carriages, one on each track, means
yieldingly urging both carriages toward the cen
ter of the turntable, a ?xed platform having
tracks with which the tracks of the turntable are
adapted to register, manually controllable power
operated means operative to shift a carriage on
the turntable onto the track of the ?xed plat
form against the actuation of the urging means
when the turntable track has been brought into
registry with a track on the ?xed platform, sack
sewing means carried on the ?xed platform and
engaging the mouth of the sack as the carriage
moves onto the ?xed platform, means auto
matically disengaging the carriage from the shift
60
ing means when the carriage is passed beyond
the sewing means, and means for dislodging the
sewed sack from the carriage upon a rearward
movement of the carriage under the action of the
(i5
urging means.
8. A sack sewing machine, including a ?xed
platform having a track, a turntable having dia
metrically extending tracks, one on each side of
the rotative center of the table, a pair of sack
supporting carriages associated one with each of 70
said tracks, means yieldingly urging said carriages
toward the center of the turntable, means on each
carriage for releasably engaging the mouth of a
bag and holding said mouth closed, a power oper
ated carriage moving element disposed in aline
6
2,107,963
ment with the tracks of the ?xed platform but
extending below the path of movement of the
turntable, the turntable when rotated carrying
one of said carriages into position over said ele
ment, manually controllable means operable to
engage a carriage when immediately above the
element with the element to thus move the car
riage onto the ?xed platform for sewing, sewing
‘ mechanism on the ?xed platform disposed ad
10 jacent to the path of travel of the carriage on the
?xed platform and operating on the sack as the
sack moves on the ?xed platform, and means for
automatically disconnecting the engagement be
tween the carriage and the carriage moving ele
15 ment to permit the carriage to be returned to its
initial position under the action of said urging
means when the sewing has been completed.
9. A sack sewing machine, including a ?xed
platform having a track, a turntable having dia
20 metrically extending tracks, one on each side of
the rotative center of the table, a pair of sack
supporting carriages engaging said tracks, means
yieldingly urging said carriages toward the cen
ter of the turntable, means on each carriage for
25 releasably engaging the mouth of a bag and hold
ing said mouth closed, a carriage moving element
disposed in alinement with the tracks of the ?xed
platform but extending below the path of move
ment of the turntable, the turntable when rotated
30 to one position carrying one of said carriages
into position over said element, manually con
trollable means operable to engage a carriage im
mediately above the element with the element to
able in one direction to permit the sack to be
carried toward and past the sewing head.
12. A sack sewing mechanism, including a turn
table having a ?oor, a pair of sack supporting
carriages mounted upon the floor of the turn
table for radial movement, a sewing head dis
posed beyond the turntable, the turntable being
shiftable to position the carriages alternately in
proximity to the sewing head, manually con
trollable motor operated means for shifting each
carriage off the turntable into coactive relation
to the sewing head to permit the bag on the car~
riage to be sewed, and automatically acting
means for returning the carriage to its position
on the turntable when the bag has been com
pletely sewed.
13. Bag sewing mechanism, including a turn
table having diametrically extending tracks on
each side of the rotative center of the turntable,
a pair of carriages mounted upon said tracks,
a cable connecting said carriages, means at the
center of the turntable engaging the middle of
the cable and urging the middle of the cable
upward whereby to yieldingly urge both carriages
toward the middle of the turntable, a sewing
head disposed beyond the turntable, the turn
table being rotatable to carry the carriages al
ternately into proximity to the sewing head,
manually controllable motor operated means
adapted to operatively engage the carriage when 30
the carriage on the ?xed platform and operating
the turntable is turned to bring a carriage into
proximity to the sewing head and shift the car
riage past the sewing head whereby a sack on
the carriage may be sewed, said means automati
cally releasing the carriage after it has carried the sack through and beyond the sewing means
to permit said cable to return the carriage to
on the sack as the sack moves on the ?xed plat
its initial position.
thus move the carriage onto the ?xed platform
35 for sewing, sewing mechanism on the ?xed plat
form disposed adjacent to the path of travel of
form, means for automatically disconnecting the
40 engagement between the carriage and the car
riage moving element to permit the carriage to
be returned to its initial position under the action
of said urging means when the sewing has been
completed, means for driving the sewing mecha
nism, and means for automatically connecting
the sewing mechanism with said driving means
14. A sack sewing mechanism, including a
turntable, a central vertically supported sleeve
mounted on the turntable, a central vertical col
umn extending into said sleeve, bearings for the
turntable on the column, a pulley carried by the
sleeve, a compression spring disposed between
the upper end of the column and the upper
end of the sleeve and thereby urging the sleeve
leaves the sewing mechanism and- then auto
and pulley upward, diametrically disposed tracks
carried by the turntable, a pair of bag supporting
carriages on said tracks, pulleys disposed adja
matically releasing said driving connection.
cent the lower end of the sleeve and mounted 50
as the sack enters the sewing mechanism and
continuing said driving connection until the sack
10. In the mechanism of the character de
scribed, a carriage having a floor adapted to sup
port a ?lled sack, forward and rear springs on the
carriage and upon which the floor is mounted,
55 means for positively limiting the‘ downward move
ment of the forward end of the floor, the rear end
of the floor having full downward movement
against the action of its springs, the floor having
an upwardly extending wall at its forward end
60 whereby when the weight of the sack comes upon
the floor, the ?oor will tilt to discharge the sack.
11. In a sack sewing machine, a sewing head,
a sack supporting carriage movable from a point
remote from the sewing head past the sew
65
ing head to carry a sack thereon into op
erative relation to the head, pow-er oper
ated
means 7 directly
engaging
the
carriage
to shift the carriage toward and past the sew
70 ing head, means acting automatically to reverse
the movement of the carriage after it has passed
the sewing head, and means forcing the sack
off the carriage upon such reverse movement,
said means being disposed in the path of move
75 ment of the sack on the carriage and being yield
on the turntable, a cable connecting said car
riages, the cable passing beneath said pulleys
and up over the pulley on the upper end of the
sleeve, a sewing head disposed outward of the
turntable, the turntable being rotatable to carry
either of said carriages into position approxi
mately opposite the sewing head, manually con
trollable means for shifting the adjacent car
riage on the turntable outward past the sewing
head to carry the bag thereon into operative en~ 60
gagement with the sewing head, the outward
movement of the carriage being resisted by the
compression spring, and means for automatically
releasing the carriage from said shifting means
when the bag has been completely sewed to 65
thereby permit the spring and cable to return
the carriage onto the turntable.
15. A ?lled sack sewing apparatus, including
a rotatable platform, a sewing head supported
adjacent to but exteriorly of the platform, car 70
riages normally positioned on the platform
movable radially thereon, radial tracks on
platform providing a ?xed path of travel
each of the carriages, means for holding
but
the
for
the
upper end of a ?lled sack and mounted upon 76
2,107,963
each carriage, said sack holding means being
constructed and arranged to hold the mouth por~
tion of a ?lled sack closed and to maintain said
mouth portion of the sack in a position to be
stitched by the sewing head, and manually con
trollable means for moving each of the car
riages o? of the platform and past the sewing
head when the platform has been moved to
bring the carriage into proper position with re
10 spect to the sewing head.
16. An apparatus of the class described, com
prising a rotatable platform, a sewing means
positioned adjacent to but exteriorly of said
platform, a plurality of carriages normally po
15 sitioned on the platform but radially movable
thereon, said platform being rotatable to selec
tively bring a carriage into working position with
7
sack and supporting the sack in erect position
above the floor, forward and rear springs of equal
strength upon which the ?oor is mounted, and
means for positively limiting the downward
movement of the floor at its forward end, the
floor having full downward movement at its rear
end whereby when the sack is released from the
supporting means and drops upon the ?oor, the
weight of the ?lled sack will cause the floor to
tilt rearward to discharge the sack.
10
18. A sack sewing machine, including a turn
table having a plurality of radial tracks, a ?xed
platform exterior to the turntable and having a
track radial to the center of the turntable and
having a bag sewing mechanism disposed above
the track, the turntable being rotatable to bring
any track into register with the track of the ?xed
respect to the sewing means, means on each
platform, a carriage on each track and movable
carriage for supporting a ?lled sack with its
20 mouth closed, means for moving the selected
from the turntable onto the track of the platform
when the corresponding track on the turntable
is in register with the track on the platform, a
power operated endless'element having a ?ight
disposed below and parallel to the tracks on the
platform and extending inward in a direction
radial to the center of the turntable, said ?ight
of the endless element being driven in a direc
carriage off of the platform and into operative
engagement with the sewing means, including an
endless element having a ?ight constantly mov
able in one direction, the ?ight having means
25 for operatively engaging a carriage when the
turntable has been turned to bring a selected car
riage into a position adjacent the sewing means,
said endless element acting to move the carriage
beyond the sewing means to allow the sewing
30 means to sew the closed mouth of the sack, said
endless element then releasing the carriage, and
tion toward the ?xed platform, a member on
means acting automatically to return the car
riage onto the turntable when so released.
17. In a machine of the character described,
35 a carriage having a ?oor adapted to support a
?lled sack, means above the ?oor and mounted
on the carriage for engaging the upper end of a
means on the turntable beneath each track
thereof engageable with the member on the cor
each carriage shiftable into engagement with
the endless element to thus cause the endless
element to engage the carriage and shift- it from
the turntable onto the ?xed platform and
responding carriage to shift it into position to
be engaged by the endless element.
VEREAU L. STATHEM.
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