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Sept. 30, 1941'
> U
_ T. JUNGMAYR
MACHINE FOR MANUFACTURING BAGS
Filed June 15, 1940
2,257,689 ‘
_
6 Shuts-Sheet 1
Sept.30,1941
TQJUNGMAx-m.
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2,257,689
MACHINE. FOR MANUFACTURING BAGS
Filed'June 15, 1940
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Theodor I'PBMQJI'
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Sept. 30, ‘1941
T. JUN‘GMAYR <
2,257,689
MACHINE FOR MANUFACTURING BAGS
Filed .June 15, 1940
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Sept. ‘30; 1941
‘ 'r'. JUNGMgYIé .
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2,257,689
momma FORI'MANUFACTURING BAGs_ _
Filed Juhe 15, 1940
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Theodor Tunsvuaar
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Sept. 30, 1941
‘2,257,689
'r. 'JUNGMAYR
MACHINE FOR MANUFACTURING BAGS
Filed June 15, 1940
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Theodor 'a'unjma 3 r
‘ Sept-30,1941
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‘ 'r; JUN‘GMAYRIQ‘
2,257,689
MACHINE FOR MANUFACTURING BAG_S
Filed June. 15, 1940
a Sheets-Sheet s
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haven/or
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Patented Sept. 30, 1941
2,257,689
UNITED ' . STATES
PATENT ‘ OFFICE
2,257,889
MACHINE FOR MANUFACTURING BAGS
Theodor Jungmayr, Stuttgart, Germany, asaignor.
tothe ?rm Fr. Healer, Maachinenfabrik-Ak
tiengesellachait,
Stuttgart-Bad Canasta“,
Germany
Applicationlnne 15, 1940, Serial No. 340,762
In Germany March 3, 1939
10 Claims.
This invention relates to machines for manu
facturing wrapping bags of the type in which a
suitably cut piece of paper, cardboard, or similar
material, is ?rst folded around a folding block
or mandrel in tube-shape and glued in the lon
g'itudinal seam, then that end of-- the tube which
is to form the bottom of the bag is folded and
(Cl. 93-12)
?nence, may also be forced downwards and thus
the proper manufacturing of the paper tube may
be prevented, or at least a?ected. In this way,
the manufacturing of an exactly rectangular
shape of the bags as well as a cleanand tight
closing at the bottom and, after ?lling the bags,
at the upper end would be seriously hampered.
glued and the bag is stripped off the folding
It is an important object of the invention to
block.
.
avoid thisdisadvantage, and with this object in
In known machines of the type referred to, 10 view, an important feature of the present in;
the cutting for forming the bag is conveyed‘ to
vention consists in that both lateral pushers of
the folding table are moved laterally away from
a table mountedibelow the folding block to move
up and down. This table is provided with a cen
the folding block towards outside, after the table
tral resilient pressing plate and with two lateral
has been raised for folding the sides of the cut
pushers. The table with the cutting is lifted 15 ting and are returned in this position towards
against the folding block, the resilient pressing
below into their initial position.
plate being held. back when engaging the bot
It is a further important feature of the pres
tom side of the folding block, but at the same
ent invention that in order to avoid the contact
time pressing the central part of the cutting
of surfaces between the lateral pushers and the
against the bottom part of the folding block, 20 cutting sides also during theupward movement
whereupon the two lateral pushers or folders are
of the pushers, the latter are provided with a
moved further upwards pressing both sides of
the cutting against the longitudinal sides of the
} concave indentation at their upper ends so that
when the pushers are moved upwards only the
folding block, whilst both ends of the cutting
edges will contact continuously with the cutting
protrude beyond the upper edge of the folding 25 sides to be folded‘. The pushers are advantage
block.
These two ends are now folded on the
ously made of an elastic material, like spring
upper side of the folding block by two folders ar
steel, and are so adjusted that they exert only
ranged above the folding block. One end of
a slight pressure upon the side surfaces of the
the cutting is longer so that after the folding
cutting to be folded against the sides of the fold
of these two cutting ends a longitudinal ~_seam 30 ing block. By reason of these aforesaid features,
is produced which is glued fast by a gummed
smearing of the cutting'durlng the folding oper
strip previously applied to the edge of one cut
ation is also avoided.
‘
ting end. Whilst the folder which has folded
Advantageously, the pusher for that side of
the last flap is moved back, a special pressing
the cutting which after the U-shaped folding of
bar is lowered ‘upon the longitudinal seam and 35 the cutting protrudes with one longer end be
forces the same to lie against the upper side of 4 yond the upper side of the folding block is pro
the folding block so that the gummed strip is
vided so much higher than the other pusher that
given the time required for bonding the two cut
with its upper curve it protrudes somewhat be
yond the upper edge of the folding block shortly
ting ends. Meanwhile the table with the cen
tral pressing plate and the lateral pushers has 40 before the upward movement of the pushers is
been returned into its lower working positionfor
receiving the subsequent paper cutting.
_
finished. This end of the cutting thus is placed
in an inclined position towards the folding block
A defect of the hitherto known machines of
so that the upper pusher engaging the same can
this type consists in that the lateral pushers of
readily grasp and fold it to the upper side of the
the folding table during their downward move 45 folding block. This feature is of special impor
ment are» constantly in contact with the folded
tance when cuttings of a less substantial quality
sides of the cutting until they leave the folding
of paper are used tending to bend away from
block on the bottom side.- The resulting disad
the folding block towards outside so that the
vantage consists in that, owing to the surfaces.
cutting cannot securely be grasped by the upper
.
touching each other, a frictional resistance is 50 pusher.
produced between the descendingpushers and
According to -a further substantial character
the adjacent parts of the cutting. This frle- . istic of the present invention the upper pusher
tional resistance may continue more or less
which serves to fold the cutting end forming
severely against the upper end parts of the cut
the upper ?ap of the longitudinal bag seam is
ting so that these, owing to the frictional in 55 pressed perpendicularly against the longitudinal
2,267,689
2
bag seam in its folding or ?nal position, inde
pendent of its drive, until the ready bag is pushed
from the folding block. Since the pressing of the
longitudinal seam of the bag is effected by the
pusher itself,_it will not. be necessary to provide
block support can also be designed in any other
manner, for example, to take the shape of an
endless chain. In this case the folding blocks are
attached to the various links of the chain which
is stretched over two sprocket wheels one of‘
which is being driven.
.
for each folding block a special pressing device
By‘ means of a hub 6 and key ‘I the folding
for the longitudinal seam, as has hitherto been
block 5 is attached to a vertical shaft 2 which is
found expedient in order to warrant careful
mounted to rotate in bearings 3 and 4 of the ma
glueing and binding of the longitudinal seam.
chine frame i. The folding block is moved by
10
This substantial characteristic above described
the shaft 2 step by step so that the single blocks
also saves the time formerly required for the up
are moved‘ successively to the eight stations
ward movement of this pusher and the ?tting of
I-VIII. A Maltese wheel 8, the hub 9 of which
the pressing device for the longitudinal seam,
has been securely ?xed to the shaft 2 by the key
thus rendering the machine more eilicientv
Since the pusher sits upon the longitudinal seam 15 l0, serves to move the shaft 2 step by step. A
crank ll having a roller l3 mounted to revolve
uniformly and is steadily. holding same under
on the crank pinion I2‘, is attached to a shaft l4
pressure after the folding has been completed,
which rests in the two bearings l5 and IS. A
any shock or noise which was formerly caused
bevel gear I‘! which engages with the perpendicu
by the violent mounting of the special pressing
device upon the folding block will positively be 20 lar bevel gear i8 is also mounted on shaft M. The
bevel gear I8 is attached to drive shaft l9 which
rests in bearings 20 and 2| and is constantly
I
understood
by‘
The invention will be better
rotated in a suitable manner by an electrcmotor,
reference to the following detailed description
eliminated.
>
'
not shown, or by a pulley fastened on the shaft.
in connection with the accompanying drawings
showing by way of example and purely schemat 25 The crank shaft It with the crank ii attached to
ically some embodiments of the invention and in
it is rotated by the bevel gears l8,'l‘|, whilst the
quired for driving the wheel on which the folding
tions I-VIII.
blocks are mounted.
has been removed from the folding block by a
‘roller it after one revolution engages one of the
which'
s
radial slots to of the Maltese drive 8 moving the
Fig. 1 is a side view of a machine having a
same
forward by a predetermined angle. Thus
number of folding blocks, parts of the machine
30 also the various folding blocks 25 are subse
being omitted.
' quently moved to the respective operating sta
Fig. 2 is a plan view of the mechanism re
Fig. 3 is a side view of the machine, similar to
After a ?nished bag on a preceding station
Fig. 1, but showing different parts of the ma v35 stripping device to be described later, the fold
ing block is ?rst moved to the operating station
chine.
.
f
-
Fig. 4 is a plan view of the machine.
Fig. 5 is a side view of the device for folding
_ I, where the cutting is fed and folded into the
shape of a tube around the folding block.
Referring to Figs. 3, 5 and 6, a table 26 upon
the bag cutting tube-like around the folding
40 which a cutting Z is to be laid is arranged below
block, drawn to a larger scale.
the'folding block 25 at the operation station‘I.
Fig. 6 is a similar view, showing different posi
The cutting Z may be placed upon the table
tions of the parts.
'
alternatively by a suction 'device of known type
Fig. '7 is a side view, showing a part of the
which lifts». the uppermost cutting from a pile
folding device of Figs. 5 and 6, on a larger scale.
Fig. 8 is a side view of the folding device for " and places it upon the table, or by drawing the
paper from a roller by a known device and mov
forming the bottom of the bag.
ing it to the table 26, where the front end in the
Fig. 9 is an elevation viewed from the left
shape of the cutting- is clipped off. The cutting
hand side of F18. 8.
been provided with gummed , strips Zl for
Fig. 10 is a side view, at ‘a larger scale, of the 50' has»
glueing
the longitudinal seam and with gummed
upper pusher which serves to fold the end of the
strips
Z2
and Z3 for glueing the bottom folds of
cutting which forms the upper side of the longi
the bag, as shown in Fig. 4. The table 26 has a
tudinal bag seam.
central recess to accommodate the pressing plate‘
Fig. 11 is a side view of Fig. 10. .
21 as well as two more recesses 28 and 28a allow
Fig. 12 is an end view at a larger scale, of the
mechanism which serves to control the last 5& ing the two pushers 29 and 29a to protrude. The
table 26 is supported by two flat irons 30 and 30a.
named pusher.
and the pressing plate 21 is held by the ?at irons
Fig. 13 is a side view on Fig. 12.
~
“30b and 300. These ?at irons are attached by
Fig. 14 is a side view, partly in section, of the
their bottom ends to a yoke 3| so that the sur
cam of the mechanismv shown in Figs. 12_ and~13.
face of the pressing plate 2'! lies exactly flush
Fig. 15 is a plan view of the cam of Fig. 14 and
with the surface of the table 26. By a hub
Fig. 16 shows the curve of said disk in dia
shaped part 32 the yoke 3| is fastened to the
grammatic view.
upper end of a movable pipe 33 which at its bot
Similar characters of reference denote similar
tom end is closed by a cap nut 34. The two-arm
parts in the different ?gures.
Referring now to’ the drawings in greater de-' 65 lever 36 which is connected with a split bushing
42 by means of the pinion members 39, l0, 4!, is
tail, it will be seen that the machine has eight
folding blocks 25. It will be understood that
the machine may be constructed so as to have a
mounted on the shaft 35 and serves to move the
pipe 33 upwards and downwards. The split
bushing 42 is fastened to the pipe 33 by a clamp
screw
43. The remaining arm of the lever 36 has
‘and the present invention is applicable also to 70
a roller 31 and by means of a spring, not shown,
machines having one folding block only.
'
said roller is held in contact with a cam 38
The folding blocks can be supported in any
mounted on the driving shaft l9.
suitable manner. In the embodiment illustrated,
' The pushers 29‘ and 28a are mounted to swing
the folding blocks 25 have been arranged in a
smaller or larger number of such folding blocks
. circle like the spokes on a wheel 5. The folding 75 in and out on a forked supporting member 44 '
3
2,257,139‘)
‘which is fastened to the upper end of a rod 45
shown, against the periphery of .an eccentric
- mounted to slide up and down within the pipe 33.
member 88 mounted on counter shaft 85. The
counter shaft 85 rotates in the auxiliary bearings
51 and 88 and is driven in known manner by
The supporting member 44 at its forked ends is
provided with clamps 45 and 45a in which the
5 means of an intermediary gear from the main
three-arm levers 41 and 41a are mounted to re
volve, by means of pins 46 and 46a. The pushers
driving shaft I 9.
23 and 29a are fastened to the upper arms of the
levers. In order to provide means of adjusting
The folding plate ‘I2 is pivoted on two pinions
‘H and ‘He at the lower end of the lever 10. An
the swinging motion of the pushers, stops 48 and
auxiliary push rod 14 which is resilient and bent
_
48a have been fastened to the lower arms of the 10 of! at right angles at its lower) end, is also con
levers. These stops strike against screw bu?ers
nected to the lever 10, and at its free end is pro
49 and 4911, Fig. 5, which are adjustable in the
vided with an elastic pressing rail 15 extending
angular braces of the supporting member 44.
somewhat beyond the folding plate 12.
.
The pushers 29 and 29a are advantageously
The rest of the folders are shaped so as to
provided with a concave indentation II and 50a 15 depress simultaneously the longitudinal seam of
at their upper ends. The pusher 28a is designed
the cutting folded tube-fashion around the fold-v
a little longer than the pusher 29 so that in its
ing block and in this way obviate the necessity of
upper position, as indicated by the dotted line on
providing any'special mechanism for this pur
Fig. 5, it will with its indentation 50a extend ‘ pose. The arrangement and shape of these
somewhat beyond the upper edge of the folding 20 folders 32 is uniformly as follows:
block 25.
Each of the folders 92 serving simultaneously A rod 5| having a smaller diameter is con
for depressing the longitudinal seam is mounted
, nected to the bottom end of the rod 45. The rod
on a central part 90, as best shown in Figs. 10 and
5| is provided at its upper end with a packing
11, to which a ledge 8| is connected below on
52 of‘ any suitable type and at its bottom end 25 both sides. The ‘folding and depressing plate 92
with a valve piston 53 of known design. The
is fastened below the ledge 9|. A pin 93 is
tube 33 below the packing 52 and extending to
.mounted on the upper side. of the central part
the closing cap screw 34 is filled with oil 54 which
90 to move freely in a bushing 94 under the
by means of the valve piston 53 sets as a brake
action of a spring 95. This spring 95 presses
30 against the chamfered part of- the pin 93 with 7
upon the rod 45.
The rail guides 55 and 55a serve to move the
its lower end and against the annular cover of
pushers 29 and 29a upwards and downwards as.
'the bushing 94 with its upper end.- A guide pin I
well as sideways. These rail guides are connected
91 is mounted on the central part 90 in order
to prevent the folder from turning. This guide
at their upper ends with the lateral arms of -
levers 41 and He by means of pinions 56 and 55a 35 pin 81 sits in a bore hole 38 of a lateral shoulder
and at their bottom ends with the yoke 53 by
of the bushing 94 and is provided with an ad
justable stop nut 99 with counter nut.
means of pinions 51 and 51a. This yoke is ar
ranged to slide with its hub 59 on the lower part
of the tube 33. The two-armed lever 50 which
rests upon the shaft 35 serves to move the yoke
58 upwards and downwards. The lever 50 by
means of a roller 5| can be moved up and down
from a cam 62 which is mounted on the driving
The roller III! is forced by the spring l02a against
shaft IS. The lever 60 is also connected by means
the running face of a cam or curved disc I55
mounted to turn on the shaft 2 of the folder
wheel 5. The curved disc I06 has two running
surfaces arranged at a different level, with the
two connecting surfaces I01 and III, as shown
of a pinion 64 with a joint 53 which at its lower
end is fastened to the hub 59 of the yoke 53 by
means of pinion 55. ,
The
bushing 84 has a lateral hub I00 mounted on a
pin llll which on its other end has a rigid crank
I02 with a roller I03, as shown in Figs. 7, 12 and
13. The pin llil revolves in a bushing I04 which
is mounted on the folder wheel 5 by an arm I05.
.
Folders ‘l2 and 92 are arranged above the fold
ing block 25 and serve to fold the flaps Zc and Zd
in Figs. 14, 15 and 16. A segmental ratchet I09
which after the shaping in U-form of 'the’cutting 50 is mounted on theupper surface of the curved
Z protrude beyond the upper edge of the folding
disc and engages with a- gear segment N2 of a
block, upon the upper surface of the folding block
two-armed lever Ill mounted to move on a pin
H2 which rests in a sleeve-shaped bearing
and thus form the upper longitudinal seam of
the bag
bracket ‘I5. The shaft 13 which, ‘as described
The folders ‘I2 and 92 may be arranged to move 55 above, rests with one end in the bearing bracket
along a straight line. In the present casev they
or trestle ‘l5 and with the other end in the rigid
are swingablymounted by means of levers ‘Ill and
bearing ‘II, will prevent turning of the trestle
90. Only one folder 12" has been provided which ‘
is mounted rigidly on station I. On the other
hand, each of the folding blocks has its own 60
folder 52 so that the folders 92 move along with
the folding blocks.
.3
The lever ‘I0 of the stationary folder ‘l2v is
mounted to swing on: a‘ shaft ‘I3 which at one end
rests in a bore of the part 15 sitting loose on the
upper end of the shaft 2 and at the other end
rests in a trestle ‘l1 suitably mounted on the
machine frame. The folding lever 10 is moved
back and forth by means of the arm 18 and the
push rod 19 which is connected with the lever 30.
The latter is mounted on a supporting pin ll of
the trestle 82 which is fastened to the machine
frame I. A lever 83 with a roller 84 at its lower
end is also hinged to the pin ll. This roller 34
is held by known means as by a spring, not
15 which is loosely seated on the shaft 2. A push
rod “5, Fig. 1, serves to move the two-armed
lever Ill‘ back and forth. This push-rod H3 at
its other end is connected with a lever I I4 fas
tened on a pin H5 which is mounted to turn in
a trestle ll‘. Another lever III, also hinged to
the pin “5, is jointed with a push rod Ill which
65 at its lower end is jointed with a lever H9. The
latter is mounted to move on a pin l 20 of a trestle
l2| which is fixed to the machine frame. The
lever “9 has a, roller I22 which rests on a cam
or eccentric I23 mounted on the auxiliary driv
70
ing shaft ll.
‘
.
'
The device for making the bottom of the'bag
is arranged on station II, as shown in Figs. 4, 8
and 9. It is operated in the generally known
‘
manner’ in that two opposite end parts of the
75 cutting, which protrude beyond the folding block
4
2,267,689
and have been folded tube-shape on station I, are
now folded inwardly ‘against the folding block
shaped members I80, I 8I which are fastened to
short levers I82, I83, are moved against the
and the two comers formed at right’ angles to‘
sides of the folding block. A spring‘ I86 tends
to hold the hooks in the inner position shown in
Fig. 4. The levers I82, I83 turn on the buckles
or pins I84, I85, which are mounted in two bush
ings I86", of which only one is shown on Fig. 3.
the ?rst folding are then turned over.
The folders I25 and I26 serve for turning the
upper and lower end-parts of the bag tube whilst
the folder I21 turns over the back corner, as
viewed from the feed of the folding block wheel.
These bushes are fastened to a sliding bushing '
The front corner is turned over by the stationary
I88 with lateral support I81. The bushing I88
folding and pressing bar I28 during the switch 10 is provided with a link I89 in which a sliding
ing of the folding block wheel to station III.
block I90 is made to slide. The latter is con
The folders I25 and I26 are fastened to angle
nected with the operating lever I9I which is
' levers I29 and I30 which are connected with the
mounted to move on shaft 35 and is also con
bushings I33 and I34 by bearing pinions. I3I and
nected with an angular two-armed lever I92 upon
I32. The bushings I33 and I34 are mounted on 15 which are mounted two rollers I93, I94 controlled
a rod I35 which rests rigidly in a trestle I36 ?xed
by the two cams I95, I96. The latter are
to the machine frame I, as shown in Fig. 9. The
mounted on shaft I 9. The sliding bushing I88
free ends of the angle levers I29 and I30 are
moves back and forth on a, sliding rail I91 which
provided with gear segments I31 and I38 in
is hinged in a trestle I98 fastened to the machine
mesh with each other. A push rod I40 moving 20 frame. This sliding movement of the bushing
both levers into the folding position is connected
is controlled in known manner by a shoulder I99
at one end with the lever I30 and at its opposite
sliding on a rail 200.
end with a two-armed lever I4I having at its
opposite end a roller I42 which presses against
After a‘ folding block 25 has reached the sta
tion I after, one switching motion of the fold
the cam I43 mounted on the counter shaft 85. - .
A spring I39, which at one end is fastened to the
ing block wheel 5, the parts of the folding device
operative at this station will be in the position
push rod I40 and at the other end to the ma
shown in Fig, 5.
After a paper cutting Z has
chine frame I, holds both folding levers I29 and
I30 in the swung-out working position as shown
in Fig. 8 and also forces the roller I 42 against
the cam I43. The folding device I21 is fastened
to the swing lever I45 which is rigidly connected
been conveyed to the table 26, the table with the
smoothing plate 21 is moved upwards just be
30 low the folding block 25 by means of the pipe
33 and the operating lever 36, the plate 21 press
ing the cutting in its central part against the
to the bearing pin I46. The latter can be moved
bottom side of the folding block and holding it
back and forth in the bushing I41 as shown in‘
tight. Simultaneously with the table 26, the two
Fig. 9, by the lever I48 engaging at the bottom.
lateral folders 29 and 294: have been moved up
This lever is jointed with a push rod I49 which
.wards, as shown in Fig. l, by means of the oper
at its opposite end is jointed with a lever I50 of
ating lever 60, joint 63, yoke 58, guides 55 and 55a
which the hub I5I is mounted on a bearing pin
and levers 41, 41a, and the stops 48 and 48a move
I52 so as to move in the bushing I53 fastened
against the stop screws 49 and 49a taking along
to the machine frame.
.
40 the supporting member 44 with the guide rail 45.
A lever I54 mounted at the lower end of this
Simultaneously the oil from that part of the pipe
pin by means of the roller I55 engages the _
33 above the valve piston 53 of the rod 5| enters
groove of a cam shaped drum I56 mounted on
through the valve piston 53 into the part of the
pipe 33 below the valve piston. The two folding
the counter shaft 85. The folding and pressing
bar I28 is mounted rigidly on an arm I51 which. . slides 29 and 29a, as will be remembered, are
by means of the bearing support I58, Fig. 8, is
moved upwards in the closed-in position as
shown in Fig. 1 and parts'Za and Z1; projecting
A trestle I60 in which a two-armed lever I6I
on both sides of the central part of the cutting
is mounted to rotate on the bearing pinion I62, is
Z which by the plate 21' is pressed againstthe
fastened to the‘ machine frame at station III. 50 lower side of the folding block 25 are bent by the
The two-armed lever I6I has a plate I63 on one
indentations 50 and 50a of slides 29 and 29a
end being connected at the other end with a
around the two lower edges of the folding block
push rod I64 which is fastened to a three-armed
25 so that these parts are folded rectangularly
operating lever I65. The latter is mounted to
upwards against the sides of the folding block.
turn at I33 on the trestle I60 and at its lower
Since the folder 29a is somewhat longer than its
end has a roller I61 which engages with the
counter part 29, the indentation 500, of the folder
cam I68 mounted on shaft 85.‘ An upwardly ex
290 (see the dotted line in Fig. 5) bends the end
tending arm I69 has a bushing I12 in which a ' Zd, protruding beyond the upper side of the fold
mounted on rodi I35.
'
resilient smoothing stamp I10 is supported to
ing block 25, around the neighbouring upper edge
of the. folding block towards the inside.
move horizontally in known manner,‘ by means
Now, the lever 10 with the pusher 12 is ad-.
of a bearing pinion I1I. A stop pin I14 to serve
vanced towards the edge Zc forming the lower
as counter-support, as will be described later,
flap of the longitudinal seam of the cutting Z,
is mounted 'in a lateral shoulder I13 of the
whereby this edge is turned around the upper
trestle I60.
65 edge of the folding block 25. Simultaneously,
The station IV is idle.
the auxiliary pusher 14 is somewhat in advance
Referring to Fig. 4, the stations V and VI
and through the resilient ledge 15 presses the
show two further smoothing stamps for the bot
cutting against the folding block below its upper
' toms, which are of known construction and, need
edge.
not be further- explained.
70
Then, the folding lever 90 with the pusher 92
On station VII the ?nished bagowhich has been
swings towards the inside, moving back the push
well dried and pressed at the different glued
er 12, and folds the edge Zd of the cutting Z,
joints, is removed from the folding block. This
forming the upper ?ap of the longitudinal seam,
may be eil'ecteed by means of the known strip
around the upper edge of, the folding block,
ping device shown in Figs. '3 and 4. The hook 75 whereby the longitudinal seam of the bag is
aeoaeso
formed and glued. The folding lever 08 is ac
tuated by the cam I88 which is moved by en
gagement of its toothed segment I08 with the
Simultaneously the lever Iil is moved with its
plate I83 against the'upper end of the pin 83
of the folder 90, forcing it slightly downward.
swinging segment lever III. Simultaneously, the '
roller I03 of the crank I02 runs upwards from its
fiuenced by the spring 08, is thereby given addi
position shown in Fig. 5 along the curved path
way I01 and assumes the ‘position shown in Fig.
6, after the folding operation is completed. The
The folding and pressing ledge 02 which is in
tional pressure which is imparted to the longi
tudinal seam of the ?nished package, so, that
the glued joint connection, depending upon the
folder 0! is somewhat retarded by the thickness
character of the cutting, can thereby, be rendered '
of the cutting during the folding operation and 10 all the more integral. The stop pin I'll below
the pressure spring 85 is loaded. The longitudi
the folding block‘ serves as counter support.
nal seam of the cutting now formed is thus held
Simultaneously with this smoothing and pressing
under strong grip of the folder 82 which holds
movement, the bottom stamp I10 is moved against
and presses it together. The folding device 02
the bottom folding by the movement of the lever,
remains in this gripping position during the
I88, whereby the pressure is applied also to the
- switching of the folding block wheel until the
bottom, and an integral connection between the
finished bag is stripped off, as will be described
single folds is secured. During the. subsequent
later.
‘
switching steps of the folding block wheel the
As soon as the folder 92 has gripped the end
bag reaches the stations IV,‘V, VI and VII. On
Zd of the cutting. the operating lever 60 is swung 20 stations V and VI a pressing device similar to
downwards again, whereby the guide rails 55 and
station III repeats the smoothing and pressing
55a exert a downward pull on the levers 41 and
of the folds at the bottom. On station VII the
"a of the supporting member 44. Owing to the
bag is stripped from the folding block by means
braking effect of the oil in the pipe” below the ‘
of the pulling hooks I80, I8I,,already described.
valve piston 53 of the rod SI. the folders 28 and 25 As soon as the folding block has arrived on the
29a‘ by means of the rails 55 and 55a are swung
station, the pulling hooks are moved out of their
out laterally into the position shown in Fig. 6
until the stops 48 and 48a of the levers 41 and
rest position into the operating position, Fig.‘ 4,
by the return movement of the sliding bushing
11a strike against the forked arms of the sup
I88, through the operating lever I9I. During
porting member 44. Then the parts 29 and 29a 30 the stripping operation,_ the hooks I80, I8I with
are moved backinto the lower position while be
their ends lying against the two sidewalls of the
ing still spread out and out of contact with the
folding block strike against the front ends of
cutting. Meanwhile the operating lever 36 has
the bag and slide it off the folding block.
returned also the table 26 with the pressing plate
Prior to stripping off the ?nished bag, the
21 into the lower position shown in Fig. 5. Only 35 roller I03 of the swingable device of the folder
in this lower position of they operating lever 80
92, which hitherto had pressed the longitudinal
ceases the‘: braking effect of the oil upon the bot
tom side of the valve piston II. When after the
seam against the upper side of the folding block,
gets into the pathway I08 of the cam I08 and is
next switching operation of the folding block
transported to the lower surface of the cam,
wheel by the operating lever 80 the folding table 40 with the result that the position according to
is moved upwards again, the oil‘ which has en
Fig. 5 is resumed. The distance between the two
tered above the valve piston, 03 will have the op
surfaces I01 and I08 of the cam I08 can be ad
pomte effect on the piston so that now the fold
justed to suit the requirements of construction
era 28 and 290 are moved inwards and raised in
of the bag manufacturing machine. Moving to
this position so that a new cutting can be folded. 45 and fro of the cam I06 can also be adjusted by
After the cutting Z has been folded tube
the segment lever III. Depending upon the
shaped around the folding block 25 on station I,
thickness of the cuttings, the height of the fold
as hereinbefore described, the folding block wheel
ing pusher 82 in relation to the axis of the hub
5 is moved forward one step by the Maltese drive
I00 can also be adjusted by turning the stop nut
described above, thus switching the folding block 50 90 of the guide pin 08, so that careful folding of
from station I to station II. Here the folding . the edge Zd as well as thorough smoothing and
pushers I25, I28, shown in Fig. 8, are successive
pressing of the longitudinal seam may be en
ly moved inwards and thereby cause folding of
sured with any thickness of the cutting.
the end-parts of the tube-shape cutting, which
The method and apparatus of the present in
project above and below the front edge of the 55 vention have been described in detail ‘with refer
folding block. Then the lateral folding device
ence to specific embodiments It is to be under
III is inwardly moved by means of its operating
stood, however, that the invention is not limited
lever, thereby turning over, the rear bottom ‘cor
by such specific reference but is broader in scope
‘ ner. At a suitable moment during this folding
and capable of other embodiments than those
operation the two folders I20, III, are returned 60 speci?cally described and illustrated in the
to their previous positions shown in Fig. 8.
Now the folding block wheel 5 is moved through
It is also to be understood that the following
another step. The lateral folder I21 remains
claims are intended to cover, all of the generic
?rst in its inside position until the end corner
and specific features of the invention herein de
of the tube which stands forward in the advanc
scribed, and all statements of the scope of the
ing direction of the folding block wheel, is
invention which, as a matter of language, might
gripped and turned over by the stationary fold
be said to fall therebetween.
ing bar Ill. The bar I20 reaches as far as sta~
I claim:
‘
tion III, as shown in Fig. 4, and exerts a suit
1:‘ A machine for making bags from a ‘cutable pressure upon the folding ofthe bottoms 70 ting, comprising at least one folding block, a
so that their profile is made rigid by the glued
table mounted below the folding block and
adapted to be moved up and down and to receive
. Joints.
Afterthe folding block has been advanced to
the cutting, two lateral folding members adapted
station III, the longitudinal bag seam is ?rmly
to be moved up and down and sideways outwards
pressed by moving inward the lever I 0!, Fig. 3. 75 and arranged for turning over the ends of the
drawings.
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6
2,257,689
said folding members being provided with a con
member operating on the end of the cutting
forming the upper ?ap of the longitudinal seam
cave recess at their upper ends.
in its folding position is. pressed perpendicularly
cutting'against the sides of the folding block.
'
against the longitudinal seam of the bag, after
2. A machine for making bags from a cutting,
said end has been turned over.
comprising at least one folding block, a table
6. A machine for making bags from a cutting,
mounted below the folding block and adapted to
comprising a plurality of folding blocks, means
be moved up and down and to receive the cut
for folding the cutting U-shape around one fold
ting, two lateral folding members adapted to be
ing block so that the ends of the cutting extend
moved up and down and sideways outwards and
arranged for turning over the sides of the cut 10 beyond the upper edge of said folding block,
folding members for forming the protruding
ting against the sides of the folding block in
ends into a longitudinal seam, means for forming
such manner that one side of the cutting after
being turned over projects by a greater length
the bottom of the bag, means for stripping off
‘the ?nished bag vfrom the folding block, means
beyond the upper end of the folding block than
for actuating said folding members, and sepa
the second side of the cutting, said folding mem
rate means by which the folding member
bers being provided at their upper ends with a
travelling with the folding block which serves
concave recess and they folding member for one
to fold the end of the cutting forming the upper
side of the cutting being so much higher than
?ap of the longitudinal seam of the bag, is
the folding member for the second side of the
cutting as to extend with its concave recess 20 pressed perpendicularly against the longitudinal
slightly beyond the upper edge of the folding
block in the position shortly before the end of
seam from its folding position until its position
for stripping off the ?nished bag from the fold
its rising motion.
ing block is reached.
_
'
3. A machine for making bags from a cutting,
comprising a plurality of folding blocks, a plu
rality of working stations, means for moving the
folding blocks successively into operative con
dition with respect to the successive stations,
means for folding the cutting U-shape around
protrude beyond the- upper edge of the folding
block, folders for forming the protruding ends
the folding block, two folding members arranged
30 into a longitudinal seam, and ‘a spring acting
above the folding block for turning over the
upon the folder which serves to fold the end of
ends of the U-shaped cutting projecting over the
upper side of the ‘folding, and means by which
the folding member for the end of the cutting
tudinal seam and tending to press this folder in
'1. A machine for making bags from a cutting,
comprising at least one folding block, means for
folding the end of the cutting U-shape around
the folding block so that the ends of the cutting
the cutting forming the upper ?ap of the longi
its folding position perpendicularly against the
longitudinal seam of the bag.
8. A machine for making bags from a cutting,
comprising a plurality of folding blocks, a plural
ity of stations, means for moving the folding
4. A machine for making bags from a cutting,
blocks to the various stations in succession, one
comprising at least one folding block, a table 40 of said stations including means for folding the
cutting u-shape around a folding block so that
mounted below the folding block and adapted to
the lateral ends of the cutting protrude beyond
be moved up and down‘ and to receive the cut
ting, two lateral folding members adaptéd to be
the upper edges of the folding block, a plurality
of folders including folders for forming the pro
moved up and down and sideways outwards and
truding ends into a longitudinal seam and a
arranged for turning over the sides of the cut
which is to be turned over at last, is held in the
folding position, after this turning over opera
tion, until the folding blocks are moved on to
the next station.‘
' ting against the sides of the folding block, a sup
porting member and angle levers for mounting
the lateral folding members on said supporting
member to be swingable between twov angular
folder for folding the end of the cutting forming
the upper ?ap of the longitudinal seam, means
for forming the bottom of the bag, means for
stripping off the finished bag from the folding
positions, a rod on the upper end of which said 50 block, means for holding said last folder in the
supporting member is secured, a pair of guide
members engaging lateral arms of the angle levers
and adapted to move said supporting member up
holding position until the ?nished bag is stripped
off from the folding’ block, said last mentioned
folder travelling along with the folding blocks,
and means acting upon said last mentioned
and down, a tubular member permitting the up '
and down movement ofthe table, said rod {being 55 folder and tending to press the folder perpen
dicularly against the longitudinal seam, and‘an
guided in the upper portion of said tubular mem- .
other of said stations including means for exert
her and reaching with a reduced extension, in
ing pressure on the folder.
cluding a valve piston at its lower end, into the
9. A machine for making bags from a cutting,
lower portion of said tubular member which in
cludes a braking ?uid, whereby said angle levers 00 comprising a plurality of folding blocks, a plural
with their lateral folding members are swung in
ity of stations, means for moving the folding
ward into the folding positionas said guiding
blocks to the various stations in succession, one
members are raised with respect to the tubular
of said stations including means for folding the
cutting U-shape around a folding block so that
member, while said folding members are swung
outward, away from the foldirg block, as said 65 the lateral ends of the cutting protrude beyond
guiding members are moved downward with re
the upper edges of the folding block, a plurality
spect to the'tubular member.
of folders including folders for forming the pro-,
5. A machine for making bags from a cutting,
truding ends into a longitudinal seam and ‘a ,
comprising a folding block, means for folding
folder for folding the end of the cutting forming
the cutting U-shape around the folding block so 70 the upper ?ap of the longitudinal seam, means
that the ends of the cutting project beyond the
for forming the bottom of the bag, means for
upper edge of the folding block, folding members
for folding the projecting ends into a longitudi
~ stripping off the finished bag from the folding -
block, said last folder travelling along with the
folding block, means for holding these folders
hers, and- separate means 'by which the folding .75 in their folding position and to press them per-,
nal seam, means for operating said folding mem
2,257,689
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5‘
.
pendicularly against the longitudinal seam ‘of
the bag until the ?nished bag has been stripped
of! from the folding block, a carrier for the fold
ing blocks, means for swingably mounting said
the cutting, two lateral folding members adapted
folders on said carrier, a shaft for said carrier
and a cam mounted for ‘oscillation on said shaft
bers mountedabove the folding block, and means
and adapted to control the inward and outward.
swinging of said folders.
10. A machine fol-manufacturing bags from a i
' cutting comprising at least one folding block, a
table mounted below the folding block and -
adapted to be moved up and down and to receive
to be movedrup and down and laterally outwards
for turning over the sides of the cutting against
the sides of the folding block, two folding mem- '1
, adapted to move the said lateral folding mem
hers, after the completion of their upward move
ment, laterally outwards and away from the
folding block and to return the lateral folding
members in this outward condition downwards
to their initial position.
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THEODOR JUNGMAYR.
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