Improvements in and connected with Machinery for Making Paper Bags and such like.
Year: 1897

page_text: Improvements in and connected with Machinery for Making Paper
Bags and such like.
I, WILLIAM CARTER, of 62, Bothwell Circus, Glasgow, Lithographic Printer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to machinery for making paper bags and such like and
it has for its object to improve and simplify the construction of such machinery.
With this invention the operations of pasting the sheets or blanks, folding
them, and pressing them can all be performed on the one machine.
The machine consists of a table or bed of any desired construction which is pro-
vided underneath with treadle or other driving mechanism. Situated at one side
of the table is a paste vessel preferably of triangular or somewhat triangular
section with a narrow opening or slit for the paste to pass through at the bottom
and with a removable front gate. This paste vessel which is capable of vertical
movement under the action of gravity or of a spring is provided with suitable
guides for guiding it in its movements. The sheets or blanks of paper to be pasted
are simply laid evenly upon one another with one edge below the bottom of the
paste vessel which bears upon them and pastes each one in turn. Adjustable
gauges are preferably provided on the table for keeping the sheets or blanks in
place.
Arranged at one side of the pasting device aforesaid is the folding mechanism
which consists of two movable folding knives or plates which are capable of
being traversed forwards and towards each other so as to perform the folding
operation for the sides of the bags by means of two arms or levers, which, by
means of jaws or equivalent, are connected to the ends of the knives. These
arms are made one with or connected to two cross shafts arranged parallel with
each other below the table of the machine. Each shaft has an arm and these arms
are connected by means of a chain, wire, rods or such like with the treadle or other
driving mechanism. The blades or knives are automatically retracted whenever
necessary by means of springs or their equivalent.
Arranged between the aforesaid folding knives is a shaping and also bottom
forming block consisting of upper and lower plates of metal or other suitable
material connected rigidly together and hinged to a fixed plate forming the
bottom or bed of the block. The upper plate has a tapered point or end with a
hole for the finger at or about the centre thereof whilst the lower plate has a cor-
respondingly shaped flap, but without the hole, hinged or jointed to it. This flap
is provided with a projecting point or bar which serves as a handle. The handle
may be made with a cutting edge so as to cut the paper at that part when so
desired.
The spaces between the upper and lower plates of the block at each side are
sufficiently wide to admit of the entrance of the folding knives when the paper.
is being folded

page_text: The block is normally held in a vertical position and up from the bed, by means
of a spring arrangement which may be made to act on a hook or tail piece fitted
to the block.
The bed or bottom fixed plate of the device can be of such a size as to also form
a bed or support for carrying the movable knives and if necessary the pasting
mechanism as well.
Adjustable gauges are provided as guides for inserting the sheets of paper in
the block and folding mechanism.
Arranged at a convenient distance from the folding mechanism is the pressing
device which merely consists of a board or plate fitted to the table of the machine
and projecting upwardly at an angle thereto. After the bag has been passed
through the folding device it is drawn by the attendant on or over the upper edge
of the pressing board so as to smooth down and press the folds.
From the pressing board the bags fall down into or on to a shoot which delivers
them into a suitable receptacle.
The parts of the mechanism are so made and fitted together as to be easily taken
asunder and cleaned.
By raising or lowering the gate of the paste vessel the amount or thickness of
the paste can be regulated.
The pasting device can also be adapted for pasting wrappers, sheets, and such
like.
When it is desired to paste two sides of a sheet two pasting vessels may be fitted
on the same frame or bed.
The mechanism can be modified without departing from the invention.
Deted this 11th day of May 1907
COMPLETE SPECIFICATION.
Improvements in and connected with Machinery for Making Paper
Bags and such like.
I, WILLIAM CARTER, of 62, Bothwell Circus, Glasgow, Lithographic Printer,
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 follow-
ing statement:-
This invention relates to machinery for making paper bags and such like and
it has for its object to improve and simply the construction of such machinery.
With this invention the operations of pasting the sheets or blanks, folding
them, and pressing them can all be performed in a simple and improved manner
on the one machine.
. And in order that my said invention may be properly understood I have here-
unto appended three explanatory sheets of drawings, whereon,
Fig. 1 is a front view of the machine.
Fig. 2 is a plan of the machine.
Fig. 3 is an enlarged inverted plan view and Fig. 4 a back-end view of the
folding knives and part of their actuating mechanism.
Fig. 5 is a side view, Fig. 6 a front view and Fig. 7 a back view of the forming
block. Fig. 7 is drawn to a smaller scale,

page_text: Fig. 8 is a front view and Fig. 9 a sectional view of the paste vessel.
Fig. 10 is a view of a paper bag as made in the machine. The dotted lines y¹, y',
indicate the position of the bottom parts y, y, when turned over so as to form the
bottom of the bag.
Referring to the drawings whereon the same reference numerals wherever
repeated indicate the same parts.
The machine consists of a table 1 which is supported upon standards 2, 3, and
provided, underneath, with treadle or other suitable driving mechanism. Situated
at one side of the table is an improved automatic pasting device consisting of a
paste vessel 4 which, as shown at Figs. 8 and 9, is made of a triangular section and
provided with a narrow opening or nozzle 5 for the paste to pass through, at the
bottom, on to the paper sheets. This paste vessel, which is capable of a down-
ward vertical movement under the action of gravity, is provided with guides 6, 7,
working in sockets 8, 9, (see dotted lines Fig. 8) in a plate 10 secured to the table.
The guides 6, 7, guide the paste vessel in its movement. The gate 4*, which is
movable in guides, regulates the outflow of the paste. The sheets or blanks of
paper to be pasted are laid evenly upon one another with one edge below the
opening 5 in the bottom of the paste vessel which latter, owing to its weight,
bears upon them and, as they are removed, pastes each one in turn. It will be
easily seen that when the top sheet of the pile is removed the paste vessel sinks
down on to the next sheet of the pile and pastes it and so on until all the sheets are
pasted. Adjustable gauges 11, 12, 13, are provided on the table for keeping the
sheets or blanks in place. As will be seen the gauges are slotted and are clamped
in place to the table by means of sockets fitted in the table and screws with butter-
fly heads 14 which pass through the slots of the gauges and into the sockets.
Arranged at one side of the pasting device aforesaid is the folding mechanism
which consists of two movable folding knives 15, 16, of special shape (see Fig. 3)
which are capable of being traversed forwards and towards each other so as to
perform the folding operation for the sides of the bags by means of arms 17, 17ª,
18, 18, having jaws 19 at their upper ends (see Figs. 3 & 4). The jaws grasp
pivot pins 20 projecting from the sides of slippers 21 attached to the undersides
of the knives. These arms 17, 17%, and 18, 18, are pinned to two shafts 22, 23,
arranged parallel with each other below the base plate 24 which latter is. secured
to the table by means of screws at 25. Each shaft has an arm 26 and these arms
are connected by means of a chain, wire, cord, or such like, 27, with a treadle 28.
The knives 15, 16, are automatically retracted after each forward movement by
means of torsion springs 29, 30, arranged on the shafts 22, 23.
Arranged between the folding knives 15, 16, is an improved bag shaping and
bottom forming block consisting of upper and lower plates 31, 32, (see Figs. 5, 6,
and 7). These plates are connected rigidly together by means of a central rib 32"
and rivets 33 and they are hinged at 34 to a pin 35 secured to the base plate 24.
The upper plate 31 has a tapered end 36 with a hole 37 for the finger at or about
the centre thereof, whilst the lower plate 32 has a correspondingly shaped flap 38,
but without the hole, hinged to it at 39. A recess 40 is cut out of the flap so as
to enable the bag to be easily slipped off the block. The flap 38 is provided with
a projecting bar 41 which serves as a handle for turning the flap 38 and also as
a locking bar when the block is lowered to the horizontal position. The bar may
be made with a cutting edge so as to cut the paper at that part when so desired.
The spaces between the plates 31, 32, of the block at each side are sufficiently
wide to admit of the entrance of the folding knives when the paper is being folded.
The block is normally held in a vertical position (see Figs. 1 and 2) and up
from the base plate by means of a spring 42 (or equivalent) which acts on a
hook 43 fitted to the block. In Fig. 2 the dotted lines show the block in its
down or horizontal position.
Adjustable gauges 44, 45, are provided as guides for inserting the sheets of

page_text: 25 are clamping screws 1or the
paper in the block and folding mechanism.
guides.
46 is a guide nut and lock for the bar 41 at the end of the block when the latter
is lowered to the horizontal position. When in this position the bar 41 enters the
nut and locks the block firmly in place.
Arranged at a convenient distance from the folding mechanism is the pressing
device which merely consists of a board or block curved at its upper end and faced
with brass. This block 47 is fitted to the table of the machine at the back of the
folding mechanism. After the bag has been passed through the folding device
and properly folded it is drawn by the attendent over the upper edge of the press-
ing block 47 so as to smooth down and press the folds.
From the pressing block the bags are allowed to fall down through a hole 48
in the table on to a shoot 49 which delivers them into a suitable receptacle.
The parts of the mechanism are so made and fitted together as to be easily taken
asunder and cleaned.
The modus operandi is much the same as that usually adopted in this class of
machine, viz., the paper sheet, after being pasted at one edge by means of the
automatic paster, is laid on the base plate 24 (the knives being retracted) and the
block is brought down upon it, thereafter the knives are advanced so as to force
the paper, at each side, between the plates of the block and thereby form the
"bellows sides of the bag. This being done the free ends of the paper (one of
which is pasted as aforesaid) are folded down on top of the block and made to
adhere together and then the knives are retracted and the block brought to the
vertical position by the spring when the triangular bottom parts are shaped in
the usual manner when making satchel bags. The bags are finally pressed on
the block 47.
The pasting of the triangular flaps at the bottom of the bag is performed on a
separate machine made in accordance with my invention No. 11784 of 1897.
By raising or lowering the gate of the paste vessel the outflow of the paste
therefrom can be regulated.
The pasting device can also be adapted for pasting wrappers, sheets, and such
like.
When it is desired to paste two sides of a sheet two pasting vessels may be
fitted on the same table or bed.
«
I am aware that it has been previously proposed to use, in the manufacture of
paper bags, "blocks" or formers" provided with hinged flaps; and I am also
aware that laterally movable knives and various forms of pasting devices have
been heretofore used.
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 con-
sider novel and desire to claim is:-
1. A machine for making paper bags and such like having its parts constructed,
arranged, and combined together, substantially as hereinbefore described with refer-
ence to the drawings annexed.
2. The folding mechanism comprising, in combination, the improved bag shaping
and bottom forming block, the laterally movable knives, and the means for recipro-
cating the knives, all substantially as hereinbefore described and as shown on the
drawings annexed.
3. The improved bag shaping and bottom forming block consisting of the
plates 31, 32, with a rib 320, or equivalent, between them, the plate 31 being tapered
at one end and having a hole 37 therein and the plate 32 having a flap provided
with a bar 41, the two plates being hinged, at 34, to the table or a base-plate on
the table and having a spring or equivalent device which normally holds them in
a vertical position, substantially as hereinbefore described with reference to the
drawings annexed,

page_text: 4. The improved construction of automatic pasting device, substantially as here-
inbefore described and as shown on the drawings annexed.
T1
1000
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.