Year: 1888

page_text: Date of Application, 17th Jan., 1888
- Specification Accepted, 17th Feb., 1888
1, ADOLF WEIDENBUSCH, of 5 Liebigstrasse, Darmstadt, in the Grand Duchy of
Hesse, German Empire, Merchant, do hereby declare the nature of this invention and
in what manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
This Invention relates to machinery in which prepared paper tubes previously cut
into suitable lengths are made into paper bags of the description known in the trade
as square or block bottomed paper bags and it consists in the arrangements and com-
binations of parts whereby the several operations connected with the manufacture of
the said bags are mechanically performed as hereinafter explained.
And in order that my said Invention may be fully understood I shall now proceed
more particularly to describe the same and for that purpose shall refer to the several
figures on the annexed sheets of drawings the same letters of reference indicating
corresponding parts in all the figures.
Figures 1 and 2 of the accompanying drawings illustrate the general arrangement
of a machine according to this Invention in side elevation Figure 2 being simply a
continuation of Figure 1 the drawing being divided along the line - Figure 1.
Figures 3 to 5 illustrate that part of the machine which is marked I in Figure 1 and by
which the paper tube is creased on two sides. Figure 3 represents a transverse section
along the line - (Fig. 5). Figure 4 shews the creasing device in section along
the line n-n in Figure 5 which represents this part of the machine corresponding
to 1 Figure 1 in plan certain parts being represented as broken away or removed in
order to show the arrangements beneath them more clearly.
Figures 6 and 7 illustrate that part of the machine marked II in the general view
Figure 1 and which is employed to fold the paper tube after it has been creased in the
preceding part of the machine. Figure 6 is a transverse section taken along the
line a-a Figure 1 illustrating this arrangement and Figure 7 is a plan of the same
certain parts being removed to avoid confusion.
Figures 8 to 11 illustrate the third section of the machine marked III in the
general view being the pasting mechanism which applies paste to certain parts of the
bottom of the paper tube creased in the preceding mechanism. Figure 8 represents
this part of the machine in end elevation partly in section (along the line ẞ-ß
Figure 1) Figure 9 being a side elevation of the same.

page_text: Figures 10 and 11 illustrate details of the pasting mechanism drawn to a larger
scale and shew an arrangement hereinafter described which throws the pasting
mechanism out of action when no paper is supplied to the machine.
Figures 12 and 13 relate to that part of, the machine marked IV in Figure
wherein the pasted end of the paper tube are creased along the required lines and 5
pressed down to form the bag bottom. Figure 12 represents a section along the
line yy Figure 1 and Figure 13 shews this part of the machine in plan.
Figures 14 and 15 represent respectively an end elevation partly in section along
the line and a plan of that part of the machine marked V in the general view
(Figure 2). In this part of the machine the bag bottom which previously stood at 1
right angles to the tube forming the sides is turned down so that the bag is flattened.
and enabled to pass between rollers and endless cloth bands or aprons.
Figures 16 and 17 illustrate the driving gear of the machine. indicated at VI
Figure 2. Figure 16 being an end elevation and Figure 17 a side elevation seen from
the opposite side to the view in Figure 2.
Figures 18 to 24 illustrate the progressive stages through which the paper tube is
caused to pass in the course of its conversion into a bag. Figures 18, 18ª and 18b
shew how the paper blank is creased in section I of the machine (Figures 3 to 5).
Figure 18 represents the bag viewed from above as it lies in the machine, Figure 18ª
is a side view and Figure 18 an end view of the same. Figures 19 and 19ª illustrate
the next stage which is reached in passing through section II of the machine
(Figures 6 and 7) wherein the creases previously formed are opened to form the
diamond fold and the bag bottom presents the form indicated in Figure 19 which
represents the front end of the bag Figure 19ª being a side view of the same.
Figure 20 shews how the paste is applied in the pasting apparatus (Figures 8 to 11)
the parts covered with paste being shaded. Figures 21 and 21ª represent an end
and side elevation of the bag in the next stage of manufacture performed by the
creasing mechanism illustrated in Figures 12 and 13. Figures 22 and 22 shew how
the other or finishing folds in the bottom of the bag are made in the mechanism
illustrated in Figures 12 and 13, Figure 22 being an end view and Figure 22ª a side
elevation of the bag with the bottom completely formed. Figure 23 shows the bag
in the act of being flattened in the mechanism illustrated in Figures 15 and 16 and
Figure 24 represents the bag in the completely flattened form in which it leaves the
machine.
All the parts of the machine are connected together so as to be dependent
on one another and act in concert receiving motion from a pulley K Figures 2
and 17. The paper blank is carried through the machine on endless bands or
aprons and the machine is entirely automatic in its action so that no hand labour is
required. The blanks are forwarded through the machine by means of endless carrying
bands C (Figures 1, 2 and 5) passing over rollers B being maintained in the proper
state of tension by means of tension rollers F (Figure 1) and having an intermittent
motion imparted to them from the driving mechanism. The intermittent motion of
the carrying bands is produced as follows.
The driving pulley K, Figures 2, 16 and 17, drives a shaft L carrying a pinion L'
which imparts a continuous rotary motion to a toothed wheel L² fixed on a driving
shaft A extending from one end of the machine to the other (Figures 1 and 2). This
driving shaft A carries a bevel wheel o Figures 14 and 1 gearing with a corresponding
wheel o¹. From this wheel o' the rotary motion is transmitted through a shaft of to a
toothed wheel 02 (Figures 14 and 15) which drives a toothed wheel o³ (Figure 14)
and shaft o'. The shaft o' is provided at its right hand extremity Figure 15 with a
crank T working a connecting rod O connected to a crank q' Figures 16 and 17
carrying a pawl q. The crank q' acts through the pawl g on a ratchet wheel Q.
The throw of the crank T is less than that of the crank q¹ so that the continuous rotation
of the crank T produces an oscillating motion of the crank q¹. This oscillating
motion of the crank q¹ produces an intermittent rotary motion of the ratchet wheel Q
and of a toothed wheel J³ fixed on the same shaft whence the same movement
is transmitted to a toothed wheel J2 fixed upon the shaft of the lower roller of a

page_text: pair of rollers J carrying the forwarding bands C. The axis of the lower roller
carries a toothed wheel J₁ driving a wheel J* fixed on the axis of the upper roller so
as to cause the two rollers to rotate in opposite directions at the same peripheral speed
with an intermittent inotion by which the bands C and the bag blanks held between
the said bands are propelled through the machine.
The bag blanks are fed into the machine at D Figure 1 whence they travel on the
bands C through the different parts of the machine in succession and in order to ensure
that the blanks shall be presented to the creasing and other devices in the proper
position a feed comb U Figures 3 and 5 is provided which retains the blanks in the
proper position on the travelling bands. The feed comb is provided with teeth as
shewn in the drawing which when elevated above the carrying bands Cenable the
blanks to pass but when lowered as in Figure 3 stop the forward motion of the said
blanks. The movement of the comb U is derived from a cam a² on the driving
shaft A which acts upon a roller a¹ on the end of a lever a, Figures 3, 5, 12 and 13.
The lever a is fixed upon a shaft E working in bearings on the side frame of the
machine and is connected by a bar V with the comb U which is pivoted or mounted
loosely on the shaft E. When the lever a is raised by the action of the cam a² the
comb is elevated and allows the blanks to pass and when the lever a descends
the comb U blocks the passage of the blanks. During one forward motion of the
intermittently moving bands C the comb U is stationary so that the blanks are brought
close up to and in contact with the comb teeth. The comb can be adjusted on the
bar V by means of screws so that the feed of the blanks can be adjusted according to
their dimensions.
There are two sets of carrying bands one above the other the lower bands being
extended at the feed end of the machine for the reception of the blanks at D Figure 1.
The first section of the machine namely the creasing apparatus indicated at I
Figure 1 folds the corners of the blank turning them upwards and downwards along
the lines y y Figures 18, 18ª and 18 so as to prepare the paper for the subsequent
folding operations that are necessary to form the bottom of the finished bag. This
preliminary creasing is performed by clamping the blank between two triangular
shaped plates so that the corners of the blank project. These corners are first turned
upwards and then downwards by means of a bar or creaser with a wiping action.
The bag blank being deposited at D Figure 1 upon the carrying bands C is carried
forwards by the intermittent motion of the latter to, the creasing mechanism. The
paper tube is deposited upon the carrying bands in such a manner that one end
projects and with this object a special carrying band C Figure 5 is provided which is
arranged outside on the left at B¹ and supports the free overhanging end of the blank
at which the creases are to be made. By these means the paper tube is brought
between two plates 63 and X (Figures 3, 4 and 5) which are provided with three
cornered plates or jaws . When the blank is placed by the carrying bands in the
required position relatively to the jaws 6 the upper plate 63 with the jaw b attached
thereto descends and clamps the paper between this jaw and the corresponding jaw
on the plate X.
The downward movement of the plate 6 and jaw b is produced by cams 6² fixed on
the driving shaft A. The upper plate 63 extends through the second folding or
creasing mechanism and is connected at both ends with levers pivoted on the shaft E
and provided at their lower extremities with rollers & bearing against the cams 62
rotating with the driving shaft A (Figures 3, 5 and 6). When the jaws 64 are brought
together on the paper by the action of these cams, folders co Figure 4 are moved along
to the said jaws and caused to fold down the protruding corners of the blank with a
wiping action. The upward and downward motion of the folders is produced by
cams c¹³ Figure 5 acting on friction rollers c² e on the ends of bars and rotating
with the driving shaft A (Figures 3 and 5). By these means reciprocating motion is
imparted to the bars c which operate toggle levers c c having their bearing at c³.
The toggle lever c is connected to a frame formed by plates e carrying the folders c¹
and move this frame with the said folders upwards and downwards alternately. These
folders are inaintained at a certain distance apart by means of vertical bolts or

page_text: screwed rods as indicated in Figure 3. The blank having been clamped in the proper
position between the jaws 6 the corners are creased or bent upwards and downwards
by the movements of the folders c10 c10 being folded as indicated in Figures 18 18°
and 18. After the corners have been creased in the manner indicated the upper
plate 68 rises with the jaw 64 and releases the blank which is then by the next forward
movement of the carrying bands C timed to take place at this moment, carried
forwards to the next division of the machine. The lower jaw b is fixed to the
plate X which forms part of the side frame being fixed to the frames W W¹ W2. X' is.
another side plate fixed over the plate X and has a portion cut away to allow of the
movement of the upper moveable jaw band of the plate 63 (Figures 3, 4 and 5).
The folders co are attached to the plates by nuts and bolts working in slots to
admit of adjustment of the folders. A. Figure 5 is a bearing for the driving shaft A
and B₁ is a bearing for the axis of a roller which is made longer than the others to
work the extra carrying band C Figure 5.
The mechanism herein before described serves to form the preliminary folds required
to prepare the bag blank for the subsequent operations the corners being creased both
ways, upwards and downwards to prepare the bottom edges for being folded in
opposite directions.
To effect this that is to say to impart to the blank the form indicated in Figures 19
and 19 a folding apparatus drawn to a larger scale in Figures 6 and 7 is employed.
When the blank leaves the creasing apparatus herein before described it is forwarded
by the carrying bands C to a second comb U operated by the shaft E in the same
manner as the comb at the entrance to the machine. This comb likewise marked U
in the drawing Figures 6 and 7 serves to arrest the forward motion of the blank.
The latter passes between the two plates 63 and X the upper plate 63 being moved
upwards when the paper tube has arrived at the proper position. With this object
the plate 63 is fixed as hereinbefore described to the lever arm band is operated by a
cam 62 on the driving shaft A acting on the roller b¹. At this time the creased end of
the blank protrudes from between the plates X and 63. A number of tubes S¹ are
attached to the lower plate X and communicate through a rubber tube S with an air
pumping cylinder M (Figure 1). This cylinder exhausts air from the tubes S¹ so that
paper placed over the orifices of these tubes in the lower plate X is pressed against
the surface of the plate by suction. The air pump M is provided with a piston and
piston rod N which receives motion from a crank P driven by toothed gear at the
delivery end of the machine and operated by the driving shaft A (Figure 2). At
the head or front of the folding machine there is provided a plate d' which presses the
folds at the proper time. This presser moves in an arc of a circle and is alternately
moved away from and applied against the surfaces of the plates 3 and X being
operated by a lever arm d pivoted to a support de. This lever arm d is connected by
a connecting rod d³ to a lever d² oscillating on the shaft E and provided with a
roller d¹ bearing against a cam d on the driving shaft A which is timed to actuate
the presser lever dat suitable intervals. The lever arms d' are made adjustable
within certain limits by means of a loose disc d' placed on the shaft E and to which
the said lever arms are adjustably connected as indicated in Figure 6. A roller f' is
also provided which serves to fold over the lower part of the bottom of the paper
tube. This roller 7 is operated and caused to move upwards and downwards
alternately by a cam f on the driving shaft A by the intervention of a roller fl on
a lever or arm f2 acting on levers f, f. The driving shaft A passes through an
clongated opening or slot in the arm and the roller f₁ on this arm is maintained in
contact with the cam f by the action of a spring f³. The arm f is capable of
adjustment relatively to the lever f the said arm and lever being provided with a
number of corresponding holes for the reception of a bolt which connects them
together in any required position. By this means the centre of the arm f³ can
be adjusted within certain limits on the lever ft. The lever arm f³ is connected
to the lever by a joint or hinge and a spring f fixed on the end of the
lever as indicated in Figure 6 causes the roller f' to bear with a certain
amount of pressure against the paper on the surfaces of the plates 6³ and X.

page_text: The upper part or flap of the bag bottom is folded or turned back by a roller e
working in bearings in a reciprocating block or piece e³. The roller e³ is operated by
a came on the shaft A. This cam acts upon a roller e¹ on the upper extremity of a
lever which is slotted similarly to the lever f² so as to be capable of moving
in the direction of its length upon the shaft A. This lever is pivoted on a
lever working on a fixed fulcrum et attached to a plate e¹¹ projecting from the frame
of the machine.
To enable the stroke of the roller to be adjusted or regulated corresponding
parts of the levers e² and e³ are provided with similar holes for the reception of a
holt forming a pivotal connection capable of adjustment between the said levers. The
sliding piece or block ed is connected by a blade spring e' to a sliding head e the
said spring being so adjusted as to cause the roller to bear with a certain amount
of pressure against the surface of the plate X. The sliding head e is guided on
a bar eo and is connected with the lever e² by a connecting rod or link e.
When the blank which has been operated on as hereinbefore described in the first
division of the machine has been completely forwarded into the second division it is
stopped by the comb U Figures 6 and 7 and is clamped by the descent of the plate 6³.
That part of the blank which projects beyond the front of the plates 63 and X is then
turned down by the action of the vertically reciprocating roller f and pressed against
the surface of the lower plate X. When the two thicknesses of paper are thus applied
against the surface of the plate X the thickness of paper next to the said plate is
continually pressed against the same by the suction of the air tubes S¹ and air pump M.
The roller then returns to its upper position and the outer thickness of paper not
being exposed to the suction of the air pump separates from the inner thickness by
reason of its inherent elasticity so that the roller e³ being now caused to ascend readily
enters the opening formed between the two thicknesses of paper and pushes up the
outer fold turning it back against the front of the upper plate 63. The roller e is
thus caused to pass under the part marked X2 Figure 19 and folds the paper along
the creases made in the first division of the machine causing the blank to assume the
form indicated in Figures 19 and 19ª. When the plate d has been brought into
operation and caused to press down the folds as the roller e retires to its lowest
position a suitable opening being formed in the middle of the presser d' for the
passage of the said roller as indicated in Figure 7. After the folds of the bag bottom
have been formed as described the plate 63 rises slightly and releases the bag blank
which is then forwarded by the carrying bands to the third division of the
machine in which the paste is applied to the folds. A number of tubes S¹
are provided on different levels in the plate X which can be connected with the
rubber air tube S in order that the sucking action may be employed in making bags
of different sizes.
The third division of the machine forms the pasting apparatus by means of which
paste is applied to the edges of the paper which are to be subsequently united. This
pasting mechanism is illustrated in front and end elevations partly in section in
Figures 8 and 9 and Figures 10 and 11 illustrate details of the same drawn to a
larger scale. The arrangement is as follows. The pasting attachment is situated on
that side of the machine on which the folded or creased bag bottom protrudes and
consists of a frame g which is automatically moved towards the continuous fixed side
plates XX and through which three pasting bands are guided over suitable pulleys
The bag bottom must be pasted at the parts marked with shading lines in Figure 20.
The two diagonal lines of paste on the two edges of the paper are formed by two pasting
bands working on pulleys on each side of the frame g as indicated in
Figure 9. The short horizontal line of paste is applied by a pasting band 7º
working on rollers 8 in the middle of the frame. These pasting bands are driven
by the main driving shaft A by means of grooved pulleys h h² and a cord h¹.
The pulley transmits rotary motion through a shaft 3 to pulleys * round which
the pasting bands are passed. The pulleys as well as a central pulley h³ carrying
the central pasting band h³ work in a trough " partly filled with paste with
which the bands hand h° become saturated. The pasting apparatus turns -- on

page_text: L
a
trunnions g¹ as a centre and is pressed against the bag bottom at the proper time by
the action of a cam or wiper g on the shaft A which acts on a roller g¹ on a slotted
connecting rod y2 working on the shaft A Figure 8 and connected with a lever
armg. The pasting mechanism is brought into action when the bag blank has been
forwarded by the carrying bands and brought up against a comb U operated by
rod V. When the cam on the driving shaft is in the proper position the pasting
apparatus is pressed against the bag bottom with the aid of a spring g' the pasting
bands come in contact with the paper and deposit a sufficient amount of paste thereon
as indicated in Figure 20. When this has been done the pasting apparatus retires.
In order to prevent the pasting apparatus from pressing against the side of the
machine when there is no bag to be pasted a disengaging apparatus is provided which
maintains the pasting apparatus out of action under these conditions. With this
object a small plunger acting as a feeler is provided in a hollow formed in the
thickness of the side plate X being normally pressed upwards by a spring. This
feeler is connected at its lower end with a projection or stop . When a paper bag
blank is present between the carrying bands C opposite the pasting mechanism the
feeler is depressed by the bag resting on its upper end and the stop 3 is thereby
lowered to such an extent as to be clear of a corresponding stop on the rocking
frame g of the pasting attachment so that the pasting bands can be brought home
against the bag bottom. On the other hand when there is no bag in the machine
opposite the pasting apparatus, the feeler is pushed up by the spring into a
recess in the underside of the upper side plate X¹ Figures 10 and 11. The stop ³
is consequently elevated and placed directly opposite the corresponding projection 98
on the frame of the pasting apparatus thereby rendering it impossible for the latter
to come close up to the side plates XX. Under these conditions the pasting apparatus
is thus held out of action. It is evidently necessary to provide in combination with
this arrangement means for pushing down the feeler in order that it may not project
above the side plate X when a fresh blank is being fed into this division of the
machine. This is accomplished as follows. At one side of the frame g of the pasting
apparatus there is pivotted in bearings attached to the plate X a bell crank lever i one
arm of which engages with an eye or slot in a part connected with the feeler
whilst the other arm engages with a pin on the rocking frame of the pasting
apparatus. When by the rotation of the shaft A the cam g is caused to act upon the
roller g' on the lever g² in such a manner that the pasting apparatus is pushed away
from the side plates X of the machine the bell crank lever i is rocked on its centre in
such a manner as to to cause the eye is connected to the feeler to be pulled down.
Consequently each time that the pasting apparatus is pushed back the feeler is drawn
down to its lowest position. This is the position indicated in Figure 8. Figures 10
and 11 on the other hand show the feeler in the position which it occupies when there
is no paper in the machine. Now in order to crease or fold the paper which has
received the paste as aforesaid in such a manner as to completely close the bottom of
the bag the blank is forwarded to the fourth division of the machine where the bottom
is further creased or folded in two places and the folds are pressed by special pressing
plates so that the paper bag finally receives the finished form represented in Figures 22
and 22ª.
This division of the machine is separately illustrated in longitudinal section in
Figure 12 and in plan in Figure 13. The bag blank is forwarded to this part of the
machine by the carrying bands being stopped when in the correct position by means
of a comb U as herein before explained.
The side plates X X' are provided at k³, as indicated in elevation in Figure 1 and
in the sectional view Figure 12, with teeth or corrugations. A pair of claws or
tuckers ko attached to the extremity of a lever reciprocates in front of these teeth
the claws or tuckers being intermittently pushed into the grooves between the teeth k
by the action of a series of levers operated by a cam k on the driving shaft A. This
cam acts on a roller k¹ on a slotted reciprocating bar 2 the roller being normally
pressed against the cam by the action of a spring k connected to the frame. The
bar k³ is pivottally connected to a lever k³ oscillating on the shaft E. The lever k³ is

page_text: connected with the two oscillating claw or tucker levers by rods or links k¹
indicated partly in dotted lines in Figure 12. At each revolution of the shaft A the
claws are consequently forced into the grooves between the teeth . A bag blank
which has been previously pasted in the pasting apparatus hereinbefore described
being duly presented between the side plates XX, the claws are operated and crease
the pasted folds as indicated in Figures 21 and 21ª. In order to form complete folds
along the creases or lines thus produced two presser plates are provided being
alternately caused to act on the bag bottom so as to press down the folds in the form
indicated in Figures 22 and 22ª. These presser plates are carried on the ends of bell
crank levers operated by levers 1 actuated by a cam on the driving shaft A.
This cam acts upon a lever shown partly in dotted lines in Figure 12 provided with
a roller serving to reduce the friction and guided by a slot working on the shaft A.
A spring maintains the lever 12 constantly pressed against the cam 1. The lever 12
is connected to a quadrant shaped piece to which the lever is hinged at an angle
of about 90 degrees an oscillating motion is thus imparted to the quadrant shaped
piece by the rotation of the cam and in consequence of the position of the centre
of oscillation of the lever the upper presser plate is first brought into action and
flattens the upper fold previously creased by the creasing mechanism. When this
operation has been effectually performed, the lower presser plate 16 comes into action
and presses the lower fold of the bag bottom which slightly overlaps the upper fold.
The successive action of the presser plates is obtained by so arranging the quadrant
piece that at the commencement of its motion the lower link or lover which
transmits motion to the lower presser plate is on the centre or dead point whilst the
lever controlling the upper plate is attached to the quadrant at about an angle of
90 degrees with this point. The presser plates are so formed that the upper plate
presents a recess in its lower edge the other plate being provided with a projecting
part of similar form corresponding with the overlapping part of the lower fold. The
upper and lower presser plates being thus forced against the bag bottom in succession
fit closely together at their edges and press the folds firmly against the side plates XX¹.
The pasted folds are thus effectually caused to adhere at the pasted parts and the bag
assumes the shape illustrated in Figures 22 and 22. The formation of the bag bottom
is now completed the bottom being of the hexagonal form indicated in Figure 22
when flattened as indicated in the drawing.
The combs U which are employed in the several divisions of the machine herein-
before described oscillate on the shaft E by means of the lever arm a being actuated
by a cam a² on the driving shaft A as described with reference to the first division of
the machine.
It now simply remains to press out or flatten the bag for convenience of packing
for carriage or storage. With this object the bag is gradually reduced from the form
indicated in Figures 22 and 22" to that indicated in Figure 23 and is finally completely
flattened as represented in Figure 24. This is accomplished by the action of two
plates which turn over the bag bottom with an action similar to that of the mould
board of a plough. This arrangement is drawn to a larger scale in Figures 14 and 15.
With this object a portion of the lower side plate ✗ is removed at this part of the
machine so as to enable the bag bottom to be straightened out by mechanism acting
externally. Plates n' and n² are used for this purpose the plate n' being screwed or
otherwise suitably attached to the lower side plate X and the plate n² to the upper side
plate X. The upper plate n² is curved or twisted outwards so as to gradually
change from a vertical to a horizontal plane projecting from the upper side plate X¹
and the lower plate n¹ is similarly turned inwards as indicated in Figure 14. To
enable these plates to straighten out the bag it is necessary to provide for the removal
of the lower carrying band at this end of the bag which band would otherwise interfere
with the operation. With this object the left hand band C Figure 13 is drawn under
a pulley m so that the under side of the bag no longer rests upon this band and room
is provided for turning back the fold of the bottom against the under side of the bag.
The bag being thus, folded and completely flattened is now introduced between two
endless pressing cloths or aprons G Figures 16 and 17 working on rollers H (Figure 2)

page_text: and serving to thoroughly press and flatten or smooth out the bag bottom. These
cloths are pressed between rollers R R capable of being set closer together or farther
apart according to the pressure required.
The carrying or forwarding bands or tapes C work over these endless cloths. The
pressing mechanism is illustrated in Figures 2, 14, 16 and 17. The endless cloths G
are carried round the rollers J J Figure 2 receiving an intermittent motion as herein-
before described from a toothed wheel J³ and operating the carrying bands C as well
as the cloths G. The tension of the said carrying bands is maintained by means of
weighted tension rollers F Figure 1 working in vertical guides. The upper and lower
carrying bands travel from one end of the machine to the other in close proximity so
as to hold the bag between them and carry it regularly forwards with a yielding
pressure so as to avoid forcing and crumpling the paper when the edge comes in
contact with the combs U. The finished bags drop out from between the bands at the
delivery end of the machine and fall. into a suitable receptacle p whence they are
removed as often as may be necessary.
The roller J J and H H are prolonged on one side of the machine so as to enable
the pressing cloth to act on the extremity of the bag.
The several divisions of the machine are marked I, II, III, and IV in Figure 1 the
straightening out mechanism being marked V and the apparatus working the pressing
cloths is marked VI.
WW2 W3 represent the frame of the machine and Z Figure 12 is a longitudinal
plate or support on the opposite side to the side plates XX and carrying bearings for
one end of the rollers. Y is another longitudinal plate or support and W4 Figure 17
is an outside bearing for the end of the shaft L. The functions of all the other
essential parts of the machine are as hereinbefore described.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
1. In a machine for making square or block bottomed paper bags, the combination
of an arrangement for creasing or folding the corners of the blank upwards and down-
wards with an arrangement for folding or turning the end downwards and upwards
and with an arrangement for pasting the folds and an arrangement for creasing and
turning over the pasted folds or laps and the combination of all these arrangements
with an arrangement for straightening out the finished bag bottom and an arrange-
ment for pressing the bag all substantially as hereinbefore described with reference to
the accompanying drawings.
2. In a paper bag machine presenting the combinations referred to in the preceding
claim the clamping plates or jaws 64 64 the upper jaw being moveable and folders or
wiper plates c moving downwards and upwards relatively to the said jaws as and for
the purpose hereinbefore described with reference to Figures 3, 4 and 5 of the
accompanying drawings.
3. In a paper bag machine as hereinbefore described and claimed in the first
claiming clause the combination of the upper moveable clamping plate 64 with the
lever bactuated by the cam b2 and the combination of the moveable plates c c which
are controlled and operated through levers c c c by a cam c³ for the purpose of
folding or creasing the corners of the blank substantially as herein before described
with reference to Figures 3, 4, 5, 18, 18ª and 18 of the accompanying drawings.
4. In a paper bag machine as herein before described and claimed in the first
claiming clause, the combination of the roller f7 working on the vertical frame or
side plates XX with the roller e both of these rollers being independently capable of
moving upwards and downwards also in combination with the presser plate d³ which
can be brought against the side plates X X' and the combination of the tube S acting
in connection with the air pump M for the purpose of assisting in the formation of the
diamond fold all substantially as hereinbefore described with reference to Figures 1, 6,
7, 19 and 19 of the accompanying drawings.
5. In a paper bag machine of the class hereinbefore described the combination

page_text: of the roller f referred to in the preceding claiming clause with the lever f³ which
is moveable upon the lever f4 and is pressed against the side plate by a
spring f
and the cam on the driving shaft A serving to actuate the said roller fall
substantially as hereinbefore described and illustrated in Figures 6 and 7 of the
accompanying drawings.
6. The combination of the roller e referred to in the fourth claiming clause and
working in the reciprocating piece or block e with the spring e' which is fixed
on the sliding head e and presses the roller e against the side plates X X¹ and
the combination of the levers e e² with the cam e actuating the roller e also the
combination of all these parts with the divided plate do pivotally supported in tho
frame d and operated by a cam d by means of levers d² d³ for the purpose of pressing
the folded bag bottom against the plates X X¹ substantially as herein before described
and illustrated in Figures 6 and 7 of the accompanying drawings.
7. In a paper bag machine of the class hereinbefore described the combination of
the pasting bands h7 working in the paste trough 1 and over pulleys h with the
pasting band h³ working over pulleys he and in the said trough the said bands
being carried by a frame go for the purpose of pasting the laps or folds of the bag
bottom substantially as herein before described with reference to Figures 8, 9, 10, 11
and 20 of the accompanying drawings.
8. In a paper bag machine as claimed in the first claiming clause the combination
of the pasting apparatus with the cam g upon the driving shaft A the said cam
serving to move the pasting apparatus up to the bag bottom by means of an arm g
substantially as hereinbefore described with reference to Figures 8 and 9 of the
accompanying drawings.
9. In a paper bag machine the combination of an arrangement for holding the
pasting apparatus out of action consisting of a feeler *, spring is, stop 23, and pro-
jection 98 the said feeler being held down by the paper when a blank is presented to
the paster but rises and presents a stop acting on the projection 98 so as to hold the
paster out of action when there is no blank presented to it substantially as hereinbefore
described with reference to the accompanying drawings.
10. In a paper bag machine of the class described the combination of the arrange-
ment for drawing down the feeler i consisting of the bell crank lever i with the
slot working on the pin 2 and an arm working in a slot on the part * connected
with the feeler substantially as hereinbefore described with reference to Figures 10
and 11 of the accompanying drawings.
11. In a paper bag machine of the class described the claws or tuckers k in com-
bination with the corrugations or teeth and the presser plates 1° which act against
the grooved or toothed surface of the side plates for the purpose of making the closing
folds of the bag bottom substantially as hereinbefore described with reference to
Figures 12, 13, 21 and 21ª of the accompanying drawings.
12. In a paper bag machine of the class described the combination of the claws
or tuckers k, levers k³ and kt both operated by a cam k for the purpose of closing the
bag bottom substantially as hereinbefore described with reference to the accompanying
drawings.
13. The presser plates 11 the upper plate being formed with a recess and the
lower plate with a corresponding projection in combination with the levers l' and the
cain which operating the presser plates successively bringing the lower presser plate
into action after the upper presser plate for the purpose of pressing the folds in the
bag, bottom substantially as herein before described with reference to Figures 12, 13, 22
and 22 of the accompanying drawings.
14. The combination of a paper bag machine as claimed in the first claiming clause
with, the turning plates n' n² fixed to the side plates X X¹ for the purpose of
straightening out the bag substantially as hereinbefore described with reference to
Figures 15, 14, 23 and 24 of the accompanying drawings.
15. The combination of a paper bag machine as hereinbefore described and
claimed in the first claiming clause with the carrying cloths G G working between

page_text: rollers J H for pressing the finished bag substantially as hereinbefore described and
illustrated in Figures 2, 16 and 17 of the accompanying drawings.
16. In a paper bag machine of the class herein before described the intermittently
moving carrying bands C supporting the bag blank in combination with the ratchet
wheel Qarm
q, toothed gearing J2 J3, crank T and gearing o² 0³ receiving motion
from the driving shaft A as and for the purpose hereinbefore described.
17. In a paper bag machine of the class hereinbefore described the combination of
the combs U operated by levers a and cam a² fixed on the shaft A and in combination
with the. screwed or adjustable rod V for stopping the bag blank on the travelling
carrying bands substantially as hereinbefore described with reference to Figures 3
and 5 of the accompanying drawings.
18. The combinations and arrangements of parts constituting the improvements in
paper bag machinery substantially as hereinbefore described and illustrated in the
accompanying drawings.