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Патент USA US2051118

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Aug- 18, 1936- ‘
o. WEBER ETAL
2,051,118 I
BAG SEWING MACHINE
Filed Oct. 31, 1933
{sheets-sheet 1
. ~
\‘Ottv TVéber:
Albert O?/aermann,
" Zltbr/Leq/
Aug. 18, 1936.
o. WEBER ‘Er AL‘
- 2,051,118
BAG SEWING MACHINE
Filed Oct. 31,1933
:5 Sheets-Sheet 2
.AZybért Qqbermann,
twrmgy,
/
Aug. 18, 1936.
o. 'WEBER' ET AL
2505!,118
BAG SEWING MACHINE "
‘
Filed Oct. 31, 1933
3 Sheets-Sheet :5
35-; Inuantf‘ons,
Otto VVébe-rt
v,JZbL-Jb Oppa mum
2,651,11
Patented Aug. 18, 1936
STAS
PAET‘ orrie
2,051,118
BAG SEWING MACHINE
Otto Weber, Bornum, and Albert Oppermann,
Konigsdahlum, Germany, assignors to Gummi
ri‘ank A.-G., Rubber-Tank Ltd., Glarus, Swit
zerland
Application October 31, 1933, Serial No. 696,073
In Germany August 2, 1933
12 Claims. (Cl. 112—11)
Our invention relates to improvements in bag tion of the frame, the said ?gure being a section
sewing machines, and more particularly in bag
sewing machines comprising a frame adapted to
be placed on the ?lled bag and to stretch the
5 rim of the bag, and to have the sewing apparatus
placed thereon. More particularly our inven
tion relates to the construction of the frame and
cooperating parts of the sewing apparatus, and
the object of the improvements is to provide a
10 frame which is adapted to clamp the rim of the
bag between the same. Another object of the
improvements is to provide a light frame which
may be manufactured at low cost. With these
objects in view our invention consists in con
15 structing the said frame in the form of a pair
of hinged plates adapted to be placed on the
rim of the bag and to clamp the same, the said
plates being formed with longitudinal slots adapt
ed to be engaged by parts of the sewing appa
20 ratus.
For the purpose of explaining the invention
an example embodying the same has been shown
in the accompanying drawings in‘ which the same
reference characters have been used in all the
:0 pl views to indicate corresponding parts.
In said
drawings,
Fig. l is an elevation showing the sewing ma~
chine, the sewing apparatus being placed on the
frame and the frame clamping the rim of the
30 bag between its plates,
Fig. 2 is a side elevation viewed from the left in
Fig. 1,
Fig.‘ 3 is a fragmentary elevation showing the
35
frame,
Fig. 4 is a sectional elevation taken on the line
4-4 of Fig. 3,
taken in the line l2-—l2 of Fig. 13,
1
Fig. 13 is a fragmentary elevation viewed from
the left in Fig. 12 and showing one end of the
frame,
Fig. 14 is an elevation similar to the one illus
trated in Fig. 12 and taken on the line ill-Ill
of Fig. 15, and
Fig. 15 is a fragmentary elevation similar to
the one illustrated in Fig. 13v and showing the 10
other end of the frame.
The bag sewing apparatus does not form a part
of the present invention and I believe that a
brief description of the said apparatus is suffi
cient.
But for detail information reference may
be had to the application for U. S. patent Ser. No.
666,002, ?led April 13, 1933.
Referring at ?rst to Figs. 1 and 2, the sewing
apparatus comprises an electric motor 25 mount
ed on a frame comprising four legs 1 supported .20
on pairs on shoes I6’.
The frame includes arms
21 formed with eyes 28 in which a rod 29 is slid
able. To the rod a needle holder 30 is secured
which carries a needle 31. The needle holder 30
is connected by a link 32 with a crank disk 33 22,5
connected by means of a gearing (not shown)
with the shaft of the electric motor 25. Thus
from the said shaft reciprocating movement is
imparted to the needle 3L. From the frame an
arm 34 is directed downwardly which is formed."30
with a thread hole 35, and to the said thread
hole the thread is supplied from a spool 36
mounted on brackets 31 secured to the casing
of the electric motor, the said thread being
trained on a roller 38. To the case of the motor 435
a handle 39 is secured which is formed with a
switch 40 controlling the supply of electric en
ergy to the motor.
Fig. 5 is an elevation partly in section showing
the bottom part of the sewing apparatus,
The sewing apparatus is adapted to be placed
Fig. 6 is a diagrammatical elevation showing
a frame which has been illustrated in Figs. ‘40
4O
the top part of a ?lled bag having the frame of on
3 to' 11, and which comprises two plates I hinged
the sewing machine placed thereon for clamping .to each other along their top margins at 2. v To
the rim between the plates, the said ?gure illus the free ends of the said plates rails 4 are con
trating the ?rst step of the method of placing nected by means of hinges 3 which rails provide ,_
the
frame on the bag,
4
supports for the shoes 16, as is shown in Fig. 1. '4‘)
Fig. 7 is a fragmentary elevation showing a -The plates I are formed with longitudinal slots
tool used in the operation of clamping the bag 5 extending substantially the whole length there
between the plates of the frame,
of and providing guides for spring-pressed bolts
Figs. 8, 9 and 10 are diagrammatical eleva—
amounted on the legs ‘I, and also permitting the
5 0 tions illustrating the second, third and fourth Ipassage'of the needle through the same, as will 50
steps of the method of placing the frame on
the bag.
Fig. 11 is a fragmentary plan view of Fig. 1,
Fig. 12 is a sectional elevation similar to the
55 one illustrated in Fig. 4 and showing a modi?cae
be described hereinafter. At one of their ends
the plates I are each provided with an extension
providing a handle 14. The bolts 6 are shift
ably mounted in sleeves 8 mounted ‘on the legs
1. Nearv their inner ends the'bolts carry col- ‘55
2
2,051,118
lars 9, and each bolt has a pin or lug I0 between
with a cam I I secured to a shaft I3 mounted on
the slots 55 with beveled faces 20 and 2|, the said
faces 20 located at one end being inclined up
wardly and inwardly, and the faces 2I being in
the legs ‘I, the said shaft being adapted to be
clined upwardly and downwardly. When the
the collar and its bearing 8, said pin coacting
turned by means of a crank arm I2.
If it is desired to close a ?lled bag by sewing
the rim thereof, the rails 4, 4 are rocked up
sewing apparatus is placed on the frame with its 5
bolts 6 in position for engaging the beveled faces
20 the said beveled faces force the bolts 6 out
wardly from the position of Fig. 4, and the‘ said wardly, whereupon they pass into the slots 55,
plates are brought into ?at position, as shown in . and when, after sewing, the bolts arrive at the
10 Fig. 6 whereupon the frame is placed on the ?lled opposite ends of the slots 55 they are in position
bag at one side of the upwardly directed rim :1: for engagement with the beveled faces 2|, so that
thereof, as is shown in said ?gure. Now the rim the sewing apparatus may be moved upwardly,
:1: is folded downwardly ‘and into the position the beveled faces 2| forcing the bolts 6 outward~
shown in Fig. 6 in dotted lines so that it'covers ly. , In this modi?cation the cams I I may be dis
15 the frame provided by the plates I and the rails pensed with.
15
4. The outer section of the frame I, 4 is now
At one of the ends of the frame I, 4 a stop
folded upwardly together with the rim 3:, and a 23 may be provided which prevents the sewing
cleat I6 formed with a handle I5 and having a device from being moved with the needle beyond
length equal to that of the plates I is placed on the slots 5.
20 the rim :1: so as to hold the same in engagement
We claim:
20
with the plates I. After the rim :1: and the frame
. 11A bag sewing machine comprising a frame
I, 4 have thus been folded-together the cleat I6 adapted to be’ placed on a ?lled bag and pro
is retracted in the direction of the arrow 1/ shown viding tracks at‘both sides of its neck arranged
vin Fig. 9, and the plates I and the rim w clamped to rest on the shoulders of a ?lled sack, upstand
25 between the same are turned upwardly and into ing clamp plates carried by said track members 25
the position shown in Fig. 10, whereupon the for holding the top of a bag, and a sewing ma
rails 4 are turned downwardly and on the top of chine adapted to be placed and guided on said
the ?lled bag.
tracks, said plates having holes for the passage
After the frame and bag clamping device I, 4 of the needle of said machine.
has thus been brought into position, the'bolts
.2; A device as in claim 1, said plates being each 30
6, 6 are retracted from each other by turning the pivoted to' a track member and being movable
shaft I3 and the cams II by means of the crank independently of said tracks.
arm' I2, and the sewing apparatus is'placed on
3. A bag sewing machine, comprising a frame
the frame I, 4 with the shoes I6’ bearing on the adapted to be placed on the ?lled bag and in
35 rails 4, whereupon the said cams are turned back
cluding a pair of plates hinged to each‘ other along 35
wardly for permitting the bolts 6 to be pushed their upper margins and a pair of rails hinged
into engagement with the longitudinal slots 5 to the lower margins of said plates, and a sewing
by coiled springs 6’ acting on said bolts 6, until apparatus adapted to be placed and guided on
the collars 9 bear on the outer faces of the plates said rails, said plates being formed with holes for
40 I and press the same on the rim.
the passage of the needle therethrough.
After the‘ sewing apparatus has been started
4. :In a sewing machine, the combination, with
it is shiftedon the rails 4, while the needle passes a frame comprising two plates hinged to each
through the slots 5 and closes the rim at. The other along their'upper margins and formed with
bolts 6 prevent the sewing apparatus from being slots extending substantially the whole length of
45 prematurely removed from the frame, so that the plates and rails hinged to the lower margins 45
the needle is not broken by striking its point of said plates and adapted to be folded upwardly
against a plate I. The sewing apparatus may onto said plates, of a sewing apparatus adapted
'be removed only after the bag has been closed to be placed and guided on said rails with the
and after the crank arm I 2>has been operated needle in position for passing through said slots,
50 for retracting the. bolts 6. '
and spring-pressed bolts on said sewing appa 50
Finally the sewing apparatus is removed from ratus adapted to engage said slots.
the‘ frame I, 4 and the plates I and the‘rails 4
5. In a bag sewing machine, the combination,
are folded away from the rim and removed from with the sewing apparatus, of a frame adapted to
thebag.
"
‘
.
be placed on the ?lled bag and to provide a sup
55 .Preferably the plates I are provided at their port for said sewingapparatus, said frame com 55
‘inner and upper faces with cleats I‘! which are prising a pair of plates hinged to each other along
formed at their opposing faces with interengag ,their upper margins, said plates being adapted to
ing wave-like surfaces, and on the inner faces clamp the rim of the bag between them and being
of the plates I, I corresponding holes' I8 and pins formed with longitudinal slots extending .sub
60 I9 are ‘provided, the said pins being passed -stantially the whole length of the plates, rails 60
through the rim of the bag when the frame I, 4 .hinged to the lower margins of said plates and
is placed thereon for clamping the rim together. adapted to be folded onto the plates and when
In'orderto insure that the rim portions or up
“folded away from said, plates to provide guides
per margins'of the sack will be held safely in for said sewing apparatus, and spring-pressed
65 place between the plates I there can be formed bolts on said sewing apparatus formed near their ‘65
on the inner faces of the place corrugations I'I. inner ends with collars, said bolts and collars
.As shown in Fig. 11 such corrugations are pref
being adapted to engage respectively said slots
erably vertically extending wave like ribs, so and the margins thereof.
formed ‘on their respective ‘plates that the ribs
6. In a bag sewing machine, the combination,
70 on one plate engage between those of the other. with the sewing apparatus, of a frame adapted 70
1' In addition to the corrugations there may be
to be placed on the ?lled bag and including a
provided pins'I9 on one plate arranged to enter pair of plates hinged to each other along their
openings I8 in the other.
'
‘
.upper margins and said plates being adapted to
In the modi?cation shown in Figs. 12 to 15 the clamp the rim of the bag between the same and
plates 5I are provided at the ends of and above vbeing formed with slots extending substantially $.75
2,051,118
the whole length of said plates, spring-pressed
bolts mounted on said sewing apparatus in posi
tion for engaging said slots, and cams on said
sewing apparatus in position for retracting said
bolts away from each other.
7. In a bag sewing machine, the combination,
with the sewing apparatus, of a frame adapted
to be placed on the ?lled bag and including a pair
of plates hinged to each other along their upper
10 margins, said plates being adapted to clamp the
rim of the bag between them and formed with
slots extending substantially the whole length of
said plates, spring-pressed bolts mounted on said
sewing apparatus in position for engaging said
15 slots and formed near their inner ends with col
lars adapted to bear on the outer faces of said
plates for forcing the same together, and hand
operated cams acting on said bolts and adapted
to retract the same away from each other.
8. In a bag sewing machine, the combination,
with the sewing apparatus, of a frame adapted
to be placed on the ?lled bag and comprising a
pair of plates hinged to each other along their
upper margins and formed with slots for the pas
sage of the needle therethrough, said slots ex
tending substantially the whole length of the
plates, and spring-pressed bolts on the sewing
apparatus adapted to engage said slots for hold
ing the sewing apparatus on said frame, said
30 plates being formed near their ends with bevelled
faces which are inclined at the opposite ends of
the slots upwardly and inwardly and upwardly
and outwardly respectively, and being located
in position for engaging said bolts for pushing
35 the same outwardly when the sewing apparatus
is placed on or removed from said frame.
9. A bag-sewing apparatus comprising a sew
ing machine, a frame adapted to rest on a ?lled
bag and to be supported thereby, said frame com
40 prising a pair of rails with horizontal faces along
which the sewing machine is moved manually,
said frame also including a pair of clamping plates
extending in vertical planes between said rails
for holding the rim of the bag each clamping
member
having a longitudinally extending nee
45
dle-receiving slot for a distance at least equal to
the width of the bag to be closed, and said sew
ing machine including means for holding the
clamping members in operative position during its
travel along said rails.
10. A bag-sewing apparatus comprising a sew
ing machine, a frame adapted to rest on a ?lled
3
bag and to be supported thereby, said frame com
prising a pair of rails with horizontal faces along
which the sewing machine is moved manually,
said frame also including a pair of clamping
members located between said rails for holding
the rim of the bag each clamping member having
a longitudinally extending needle-receiving slot
for a distance at least equal to the width of the
bag to be closed, said sewing machine including
means for holding the clamping members in op
10
erative position during its travel along said rails,
the clamping devices being formed as plates
hinged together at adjacent edges, and the sup
porting rails being each hinged to a remote edge
15
of one of said plates.
11. A bag-sewing apparatus comprising a sew
ing machine, a frame adapted to rest on a ?lled
bag and to be supported thereby, said frame com
prising a pair of rails along which the sewing
machine is moved manually, said frame also in
cluding a pair of clamping members located be
tween said rails for holding the rim of the bag
each clamping member having a longitudinally
extending needle-receiving slot for a distance at
least equal to the Width of the bag to be closed,
said sewing machine including means for holding
the clamping members in operative position dur
ing its travel along said rails, the rails and clamp
ing members being parallel to one another, the
clamping members being hinged together at adja
cent inner edges and the rails being hinged to
the outer edges of said clamping members.
12. A bag-sewing apparatus comprising a sew
ing machine, a frame adapted to rest on a ?lled
bag and to be supported thereby, said frame com 35
prising a pair of rails along which the sewing
machine is moved manually, said frame also in
cluding a pair of clamping members located be
tween said rails for holding the rim of the bag
each clamping member having a longitudinally
extending needle-receiving slot for a distance at
least equal to the width of the bag to be closed,
said sewing machine including means for holding
the clamping members in operative position dur
ing its travel along said rails, and guiding ele 45
ments on the sewing machine adapted during the
sewing operation to engage in the slots provided
in the clamping members for passage of the needle
and thus to guide the sewing machine in its
travel.
50
OTTO WEBER».
ALBERT OPPERMANN.
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