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Патент USA US2094927

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Oct; 5, 1937. ' _
G. C'JRSTRCM
DEVICE FOR CLOSING BAG ENDS
Filed Aug. 29, 1936
2,094,927
>'
9 Sheets-Sheet 1
octl- 5, 1937-
G. ORSTROM
2,094,927~
DEVICE FOR CLOSING BAG ENDS
Filed Aug. 29, 1936
9 Sheets-‘Sheet 2
Oct. 5, 1937.,
: 2,094,927
G. bRsTRdM
DEVICE FOR CLOSING BAG ENDS
‘Filed Aug. 29, 1936
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Oct. 5, .1937. _
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DEVICE -FOR CLOSING BAG ENDS
Filed Aug. 29, 1936
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DEVICE FOR CLOSING BAG ENDS
Filed Aug. 29, 1936
9 Sheets-Sheet 5
Oct. 5, 1937.
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G. ORSTROM
2,094,927
DEVICE FOR CLOSING BAG ENDS
Filed Aug. 29, 1936
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9 Sheets-Sheet 6
Oct. 5, 1937.
-G_ GRSTROM
'
2,094,927
DEVICE FOR CLOSING BAG nuns
Filed Aug. 29, 1956
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9 Sheets-Sheet 7
Oct. 5, 1937. V
G, 6RSTROM
2,094,927
DEVICE FOR CLOSING BAG ENDS
Filed Aug. 29, 1936
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‘Oct. 5, 1937.
G. ORSTRCJM
2,094,927 I
DEVICE FOR CLOSING BAG ENDS
Filed Aug. 29, 1936
9 Sheets-Sheet .9
2,0t4,927
Patented Oct. 5, 1937
UNETED STATES
rarest orrics
2,094,927
DEVICE FOR CLOSING BAG ENDS
Gustaf Grstrtim, Alsten, Sweden, assignor to
Aktiebolaget Gerh. Arehns Mekaniska Verk
stad, Stockholm, Sweden
Application August 29, 1936, Serial No. 98,588
In Sweden August 30, 1935
18 Claims.
This invention relates to a device for closing
bag ends and it is an object of the invention to
provide improved means for closing bag ends. by
producing a transverse coil which is very smooth
5 and regularly shaped.
Another object of the invention is to provide
compact and inexpensive means adapted to close
bag endsby coiling them.
Further objects of my invention will appear
1 O from the following description when read in con
periodical movements up and down. I
At the upper edge of the frame l-i are pivotally 10
journalled a pair of oppositely disposed tucking
pin iii, rotatably journalledin the frame H5.
Fig. 3 is a front view of a coiling mechanism
together with driving device;
Fig. 4 is a section on the line IV-—IV in Fig. 1
with some details removed;
'
Fig. 5 is a planview of the part of the device
shown in Fig. 4;
Fig. 6 is a front view partly in section of the
' coiling mechanism on a larger scale;
Fig. 6a is a sectional view taken on the line
VId—VIa of Fig. 8;’
p
'
Figs’? and 8 are a side View and a plan view,
respectively, of the coiling mechanism on a
larger scale‘;
Figs. 9-11 illustrate different steps of the coil
ing procedure;
'
' Fig. 12 is a section on the line XII-XII in
Fig. l;
a
V
Fig. 13 is a view, viewed in the direction
XIII—XIII in Fig. 12;
7
Figs. 14 and 15 are sections‘ taken at right
_ angles to one another of a detail of the device
according to Fig. 13;
' '
f
Fig. 16 is a diagrammatic plan view of the‘de
tail shown in’ Figs. 14 and 15;
Fig. 17 is a view corresponding to Fig. 15 but
showing the‘ operating members in another po
sition; and
Fig. 18 is a plan view on a larger scale of the
device shown inrFig. l3.
'
7
Referring to the drawings, the open, ?lled bags
A are moved by the conveyor l stepwise in the
50
to‘ the arm '1 and thereby to the lifting piston 3
and wherein:-—
II—II of Fig. 1;
40
Q. On a driving shaft if) journalled in the ma
chine frame is ?xed a cam disc 5 I which imparts
?aps i2, a rear bag collapsing flap i3 and a '7 ,
Fig. 1 is a plan view of the device according
35
crease extending around the bag is at a levelv
with the upper edge 5 of the frame.
The lifting piston 3 is supported by a rod 6
which is pivotally connected to an arm '5 pivot
ally journalled on a pin 8‘ in the machine frame
nection with the accompanying drawings show
ing an illustrative embodiment of the invention
15 to the invention;
Fig. 2 is an elevation taken in the direction
20
(Cl. 93-6)
front one Iii.
The?aps i2 are each secured to .a
The frame it is secured to columns 38. > To each
pin it is secured an’ arm it which is pivotally
connected to a-link 5%. Both the links 18 are’
pivoted to a yoke 32, which is secured to two
spindles it, which are movable up and down
in guides 28 on the frame l5.
In the frame I5
is turnably journalled a shaft 29, to which are
secured two arms 22, which by means of forks.
are pivotally connected each to one of the spin
dles is. One of the arms 22 is-developed asa
lever, the other arm 23 of which is pivoted to 25
one end of a link rod 2'1, the other end of which
embraces a shaft 25, rotatably journalled in the
machine frame. To the shaft 25 is secured a
cam disc 25, arranged at rotation to'actuate the
roller 2i‘, journalled on the rod 25-, and thereby
impart to the rod periodical‘up and down move
ments. The yoke 32 is provided with laterally
projecting arms ‘.25, to which are pivotally con
nected 1inks‘28. Each link 29 is pivoted to an
arm 3i.
The arms 3! are each connected with
one of the collapsing ?aps l3 and Hi. The upper
end of the link, connected to theflap i3 is pro?
'vided with an oblong slot 30, which embraces-the
arm 23, and one of the arms 3 l ,Vthat is connected
~togsaid'fiap, is urged downwardly’ by tension we.
spring SLso that'the corresponding link 29 is
pulled down’ so far as the arm 28'permits.
When thebag A has been’ moved up to'rthe
position shown in Fig. 14 the cam disc 26 moves
45
the rod 24 upwards. Then the arms 22 move the
spindles as and the yoke 32 downwards, so that
the tucking ?aps i2 are ?rst folded inwardly
down into the position shown in dash and'dotted
‘ direction of the arrow (Fig. 2) into a position
lines in Fig. 18, wherebythe bag end obtains the
below a folding device 2 (Fig. 1). There the
bag is raised by means of a lifting piston 3 (Fig.
12) through a funnel-shaped frame 4 (Fig. 2) to
lapsing flap i3 is moved downwardly to the posi
tion shown in Fig. 17, and thereupon ‘the front
the position shown in Fig. 14, so that, if the bag
55‘ is provided with folding creases the lowermost
shape shown in Fig. 16.
0
Thereafter,’ the rear col
‘flap I 4 is moved down upon the flap I 3, so_ that
the bag end thus ?attened has. been laid down 55
2
2,094,927
in a direction opposite to the direction of move
Said shaft is loosely journalledvin a sleeve 10,
ment of the conveyor and the succeeding coiling
direction, which imparts to the bag end a suitable
starting position . for the ‘subsequent coiling,
whereby vertical coiling movements are avoided.
During the last part of the downward movement
is secured an arm 12, to which is secured a rela
of the yoke 32 the arm 28 moves idly in the link
tioned approximately on a level with or some
which projects from the arm ‘H, parallel with
the shaft 63. To the front end of’ the shaft 69
tively thin, ?nger-shaped leg 13, which extends
parallel with the leg 65 and is normally posi
slot780, whereby the corresponding flap is held what lower than the leg 65 (Figs. 6 and 9), and
down by the spring 8|. Now the lifting piston the axis of the shaft 69 coincides approximately
3 is lowered with the ?lled bag, so that this rests , with the rear edge of the leg 65. The axis of
anew upon the conveyor l. The conveyor ad- ' the shaft 63 coincides substantially with the front 10
vances one step, whereby the rearwardly folded edgeof the leg 65.
'
bag end is folded down under a bent guide plate
33 to the position shown in dash and dotted lines
15 in Fig. 2, until the bag‘is in position in front of
the coiling mechanism 34.
The coiling mechanism operates in the follow
ing manner:
There the bag end is
retained in a downfolded position by means of a
holding device comprising two downwardly bent
plates 35. v The plates 35 are secured to one end
tween the plates 35.
of a shaft 36, which is turnably journalled in a
‘vertically adjustable bracket 31, secured to one of
the columns 38. To the other end of the shaft 36
is secured an‘ arm 39 pivotally connected to one
holder plates 35 are swung up into the position
shown in Fig. 2. Thereafter-theswinging move
end of a lever 46 by means of a link 4| (Figs. 4
ment of the shaft 46 in the direction of the arrow
The other end of the lever 46 is turnably
journalled on a pin 42 in the machine frame, and
it is given up and down movements by a cam disc
(Figs. 9-11) commences. The toothed segment 25
55 thereby imparts to the pinions 62 and 66 and
the gear wheel 63 rotation in the direction of the
arrows (Fig. 9), whereby the leg 13 is swung in
43 secured to the shaft 25,,so that the plates 35
are swung between the end positions indicated
in Figs. 2 and 9.
the shaft 46.‘ ‘To its rearend are pivotally con
nected two link rods '50, which, moreover, are
pivoted to one end of an arm 52, turnably jour
nalled at 5| in the frame. The arm 52 is actu
ated by a cam disc 85 which is secured to the
driving shaft I0 and imparts periodical recipro
eating movements to the arm and thereby to the
45 yoke '48. Between thebeams 49 of the yoke 48
and mounted on the shaft 46 is a toothed segment
As soon as the legs 65 and
'53 have begun to straddle the bag end, and in 20
any case before the beginningof the coiling, the
25 and 5).
_ The coiling mechanism is supported‘ by two’
brackets 44, connected to each other'by means
of two horizontal rods 45. A shaft 46 is turn
ably ,journalled in the brackets 44 which are ver~
35 tically secured to standards 4'! in such a manner
as to be adjustable in a vertical direction. A yoke
48 is displaceably mounted on the rods 45 and
'
The yoke 48 with the legs 65 and 13,, in relative
positions shown in Figs. ‘7-9, is advanced until
the legs straddle‘the downfolded, ?attened bag
end (Fig. 9), whereby the leg 65 is inserted be
laterally against the leg 65 covering it and bend- a
ing the outermost bag end (Figs. 9 and 10). Now
the leg 65 forms a stop for the leg 13, and thereby .
.the continued rotation of the gear’ wheel 68_is
lrevented. Therefore, the axis of rotation is
transferred from the shaft 69 to the shaft 63,
and the fork, consisting of the legs 65 and 13, 35
now closed, will turn about theshaft 63 (in the .
direction B of Fig. 11), i. e. in the same direction
as thearm 72 at its preceding turning move
.ment, and thereby the bag end is coiled in the'
manner illustrated in Fig. 11. .Thus the axis of
rotation is suddenly transferred from the rear
edge of the leg 63 to its front edge, wherefore
the bag end is not subjected to inappropriate
tension action during the coiling, and the coil
folding takes place along predetermined creases. 45
_
If the gearing for the coiling movementis
53 (Fig. 6) which can follow the reciprocating supplemented by more gear wheels, said coiling
movements of the yoke on the shaft 46 but not movement can continue in the same direction
I turn relative to the same. It is provided with a
50 transverse pin 54 which projectsinto a longi ' for a still further number of semi-revolutions,
whereby the fork is alternatelyswung about both 50. "
tudinal groove 55 formed in the shaft 46. ' The its longitudinal edges, which are thus stepwise
toothed segment is normally held by the shaft laterally displaced. Alternatively, after 1' ‘the
46 in the angular position shown in Figs. 6 and folding according to Fig. 10 has been effected,
9. Periodical reciprocating swinging movements the coiling movement may continue in a re
55 can be imparted to the shaft 46 by means of an
versed direction, whereby the ?rst part of the coil 55
arm '56 (Fig. 4) secured to the rear end of said'
will be of zigzag form,‘ In the embodiment
shaft, which arm is pivoted to a link rod 51, the .
length of which canv be adjusted at 58. To the shown it is supposed, however, that the coiling is
when the legs have assumed the position’
link rod 5'! is imparted periodical movements ?nished,
shown in Fig. 11.
.
r
..
up and down by arcam disc 59, rotated by a trans
Now a pair of depressing bars 14 are moved 60. Y
mission 66 which is connected to the driving de
in the direction of the arrow (Fig. 1) into a posié ' .
viceof the machine and drives the cam disc shaft tion closely above the coiled bag fold. There
i
6i. The toothed segment 53 meshes with a pin
after the yoke 48 with the coiling fork is retracted,
ion 62 which is loosely mounted on the shaft 63 and the fork is opened by swinging back the
65
which, in turn, is rotatably journalled in the yoke
48.
To the front end of the shaft 63 is secured a
laterally projecting arm 64, which supports a
relatively thin, ?nger-shaped, slightly ?ute
‘shaped (Fig. 9) leg 65, which is normally po
sitioned on a level with the'shaft 63 (Figs.
'
V. r V
'
4
The bars 14 are supported by two arms 15,
which are tiirnably journalled in the. frame, and
impart to them parallel movements. The swing
ing movements of the arms 15 are effected by a
cam disc 76 which is secured toithe shaft 725, and '
6 and 9). The pinion '62 meshes with an.
_ other pinion166, which is loosely journalled on against which an arm 11, rigidly secured'to, one,
a pin 67, which is inserted into an arm 1|~se— 'of the, arms .15, is held by La tension spring 18.
V cured to the‘shaft 63.
‘ 175
toothed segment 53' when the legs are'turned 65
back into their initial positions.
The pinion 66 meshes with
a gearwheel 68, which is formed with a, shaft 69.
When the closed bag'is moved further, e. g.,to a
mechanism for applying a’ sealing strip to the 75:
3
2,094,927
bag coil, the bars ‘I4 follow the latter and hold
down the bag fold, until the bag has been sealed.
lineas the opposite longitudinaledges of said
other leg.
'7'. In a device for closing bags by coiling‘ the
What I claim is:
1. In a device for closing bags by coiling a
flattened end thereof, two parallel, rotatable
?attened end thereof, a pair of blade-shaped
legs, means for moving one of said legs against
said shafts, a blade-shaped leg secured to each
the other to form therewith a closed, substan
tially blade-shaped fork adapted to straddle a
bag end, and means for moving the closed fork
laterally by turning the same substantially
through one semi-revolution about a longitudinal
edge of one of said legs, substantially without
lateral displacement of said edge.
shafts, an arm projecting laterally from each of
of sad arms so that said legs form ‘eccentric,
longitudinal extensions of said shafts, means, for
rotating one of said shafts to turn the leg con
nected thereto laterally to cover the other leg 10
and form together with said other leg a blade
shaped fork adapted to straddle the bag end, and
means for rotating the other shaft to turn said
closed fork substantially through one semi-revo
2. In a device for closing bags by coiling a lution, the axes of said shafts extending sub 15
15 ?attened end thereof, a pair of blade-shaped , stantially in the same line as opposite longitudinal
legs, means-for moving one of said legs laterally
edges of said other leg.
over a longitudinal edge of the other leg to cover
8. In a device for closing bags by coilingthe '
said other leg and form a closed, substantially ?attened end thereof, two parallel shafts, a pair
blade-shaped fork adapted to straddle a bag end, of blade-shaped legs, each forming an eccentric, 2.0
and means for moving the closed fork laterally longitudinal extension of one of said shafts, and
by turning same substantially through one semi
a gearing operatively connecting said shafts for
revolution about the other longitudinal edge of rotating one of said shafts to turn the leg con
said other leg, substantially without lateral dis
placement of said other edge.
3. In a device for closing bags by coiling a
25
?attened end thereof, a pair of blade-shaped
legs, means for moving one of said legs laterally
over a longitudinal edge of the other leg to cover
said other leg and form a closed, substantially
30 blade-shaped fork adapted to straddle a bag end,
and means for moving the closed‘ fork in the same
lateral direction as the ?rst leg by turning said
fork. substantially through one semi-revolution
about the other longitudinal edge of said other
leg, substantially without lateral displacement of
said other edge.
_
d. In a device for closing bags by coiling a
?attened end thereof, a bag conveyor, a pair of
blade-shaped legs, means for moving one of said
40 legs against the other to form with the other
leg a closed, substantially blade-shaped fork
adapted to straddle said bag end, and means
45
nected thereto laterally to cover said other leg and ’
form a closed, blade-shaped fork adapted to 25
straddle the bag end, and for rotating the other
shaft to turn the closed fork substantially through
one semi-revolution, the axes of said shafts ex
tendingrsubstantially in the same line as oppo
site longitudinal edges of said other leg.
9. In a device for closing bags by coiling the
?attened end thereof, two parallel shafts, a pair
of blade-shaped legs, ‘each forming-an eccentric
longitudinal extension of one of said shafts, a
gear wheel rigidly secured to one of said shafts, 35
another gear wheel loosely fitted on the other
shaft, an idle‘ gear wheel meshing with both the
other gear Wheels, and means for rotating said
loosely ?tted gear wheel to ?rst turn said rigidly
secured wheel to swing the leg connected thereto 40
about the first shaft to cover the other leg and
form a closed blade-shaped fork adapted to
straddle the bag end and then to turn the Closed
for moving said closed fork laterally in the feed
ing direction of said conveyor by'turning said
fork substantially through one semi-revolution
about a longitudinal edge of one of said legs
fork substantially through one semi-revolution 4
about said other shaft, the opposite longitudinal 45
edges, of the leg vthat extends from said other
shaft extending substantially in the same line as
substantially without lateral displacement of said
edge.
the axes of both said shafts.
'
'
10. In a device for closing bags by coiling the
‘
5. In a device for closing bags by coiling a
50 ?attened end thereof, a pair of parallel blade
flattened end thereof, two parallel shafts, a pair 50,'
of blade-shaped legs, each forming an eccentric
longitudinal extension of one of said shafts, a
shaped legs, means for moving one of said legs
toward the other to form with the other leg a
gearrwheel rigidly secured to one of said shafts, '
another gear wheel loosely ?tted on the other
to straddle said bag end,'and means for moving .7 shaft, an idle gear wheel meshing with both the .
closed, substantially blade-shaped fork adapted
55. said closed fork late-rally by turning same sub
stantially through one semi-revolution about a
longitudinal edge of one of said legs substan-r
tially Without lateral displacement of said edge,v
one of said legs extending along the other’ leg
other gear wheels, means for rotating said loosely
tted gear Wheel to ?rst turn said rigidlysecured
wheel to swing the leg connected thereto about "
the ?rst shaft to cover the other leg and‘formsa
closed, substantially blade-,shaped'fork, adapted to
60 and being'turnable about an axis which extends
'
substantially
in the same
edge of said other leg.
line as a longitudinal
6. In a device for closing bags by coiling a
?attened end thereof, two parallel, rotatable
65 shafts, a pair of parallel, blade-shaped legs, each
forming an eccentric longitudinal extension of
one of said shafts, means for rotatingone of said
shafts to turn the leg connected thereto to cover
the other leg, and form together with said other
70 leg a substantially blade-shaped fork’adapted
to straddle the bag end, and means for rotating
the other shaft to turn said closed fork substan
tially through one semi-revolution, the axes of
said shafts extending substantially in the same
,
straddle the bag end and then to turn the closed
fork substantially throughone semi-revolution’
about said other shaft, and a toothed rocking seg
ment meshing with said loosely ?tted gear: Wheel,
the opposite longitudinal edges‘ of the leg that 65
extends from said other shaft extending substan
tially in the same line as the axes of both said
shafts.
11. In a device for closing bags by’ coiling the
?attened end thereof, means for bending down
the ?attened bag end, a pair of blade-shaped
'legs, one of which’ being movable to form to1~
gether with the other leg a closed, substantially‘ V
blade-shaped fork adapted to 'straddlesaid bag
end, and means formoving said closed forklater
4
2,094,927
ally in a directionoppos'ite to the direction of
vdownfolding by turning said: fork substantially
through one semi-revolution about a longitudinal
edge of one of said legs, substantially without
lateral displacement of said edge.
I
r '7 12. In adevice for closing bags, means adapted
said closed fork laterally’by turning same sub;
stantially through one semi-revolution about a
longitudinal edge of one of said legs, substantially I
without lateral displacement of said edge.
7
16. In a device for closing bags by coiling the
?attened end thereof, means for bending down
to coil the flattened bag end and having a pair'of
?attened bag end, a pair of blade-shaped legs,
blade-shaped legs, one of which being movable to a ‘the
one'of which beingmovable to form together with
form together with the other leg a closed, sub . the other leg a closed, substantially blade-shaped
10 stantially blade-shaped fork adapted to straddle
said bag end, means for feeding the bag to said
coiling means, means positioned above said feed
ing means and in advance of said coiling means
for bending down the ?attenedbag end in a direc
15 tion opposite to the feeding direction, and means
for moving said closed fork laterally in the feed
ing direction by turning said fork substantially
through one semi-revolution about a longitudinal
edge of ‘one of said legs, substantially without
20V
lateral displacement .of, said edge.
,
-
713. In a device for closing bags, means adapted
to coil the ?attened bag end and having a pair of
blade-shaped legs, one of which being movable to
stantially'blade-shaped fork adapted to straddle
said bag end, a‘conveyor for feeding the bag to
placement of said edge;
'
14. In a device for closing bags, means for col?
lapsing and ?attening a bag end, means adapted
to coil the flattened bag end and having a pair of
blade-shaped legs, one of which being movable to
form together with the other leg a closed, sub
stantially blade-shaped fork adapted to straddle
said bag end, means for feeding the bag from said
?atteningmeans to said coiling means, means
positioned between said coiling means and said
?attening means for bending down the ?attened
bag endin a direction opposite to the coilingv
direction, and means for moving said closed fork
> laterally in the feedingdirection by turning said
50 fork substantially through one semi-revolution
about a longitudinal edge of one of said legs, sub
through one semi-revolution about a longitudinal
edge of one ofjsaid legs, substantially without
lateral displacement of said edge, said holding
means being operatively connected to said driving 20
means to release said bag end when said legs are
moved into their position above said supporting
'
one of which being movable to form together with
the other leg a substantially blade-shaped, closed . '
end in transit in a direction opposite to the feed
ing. direction of said conveyor, and means for‘
moving said closed'fork laterally in the bag feed‘
ing direction by turning said fork substantially
through one semi-revolution about a longitudinal
edge of one of said legs, substantially without dis
the retracted legs, and means for moving, said
‘closed fork laterally by turning'same substantially
17. 'In a'device for closing bags by coiling the
?attened end thereof, means for bending down 25
the ?attened bag end, a pair of blade-shaped legs,
said coiling means, a stationary guide member
positioned above'said conveyor and in advance of
said coiling means to bend down the ?attened bag
" 30
means to straddle said bag end, meansfor holding
said bag end in a downfolded position in front of
means.
' form together with the other leg a closed, sub
25
fork, means for supporting the bag, driving 10
means for moving said legs in their longitudinal
direction into a position above said supporting
fork, means for supporting the bag, driving means
for moving said legs in' their longitudinal direc
tion into a. position above said supporting means
‘to straddle said bag end, meansfor holding said
bag end in'a bent down 'position‘in front of the‘
retracted legs, and means for moving said closed
fork. laterally by turning same‘ substantially
through one semi-revolution about a longitudinal
35
edge of one of said legs, substantially without "
lateral displacement of said edge, said holding
means comprising a pair of plates operatively con
nected to said driving means to be moved down
against thedownfolded bag‘end before the legs
are moved into their :position above said sup
porting means and to be elevated when said legs _. 7
enter said position.
18. In a device for closing bags by coiling the
?attened end thereof, a pair of blade-shaped legs,
one of which being movable to form together with
the ‘other leg a closed, substantially blade-shaped '7
fork adapted to straddle said bag end, means for -. ,
coiling said bag end by moving said closed fork
laterally by turning same substantially through
stantially without ‘displacement of said edge.
15. In a device. for closing bags by coiling the
. one semi-revolution about a longitudinal edge of
?attened end thereof, means 'for‘supporting the
placement of said edge, means for holding down
one’ of sai'dlegs, substantiallyawithout lateral-dis- .
555 bag, a pair of blade-shaped legs, one of which
the coiled bag end,rand means operativel-ycon
being'movable to form together with the other leg , necting said fork with said holding means to ?rst
' a closed, substantially blade-shaped fork, means move "said holding means into a positionabove the;
forrmoving said legs in their longitudinal direc
coil and fork andgthen to retract-the fork in its
tion into a position above said supporting means longitudinal direction out of said fold.
I
to straddle said bag end, and means for moving ‘
GUSTAF oRsTru'jM.
I ' ' >
'
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