Improvements in Machinery for Making Paper Bags.
Year: 1896

page_text: Date of Application, 15th July, 1896
Complete Specification Lift FIL
1007
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Making Paper Bags.
I FRANCIS DIXON BUMSTED of Hednesford in the County of Stafford Mechanical
Engineer do hereby declare the nature of my said invention to be as follows:-
My invention has for its object improvements in machinery for making paper bags
and has special reference to that class of paper bags known as square bottom bags.
Machines for this purpose have generally been characterized in one of the main
features at any rate by the use of revolving plates for holding the paper when folded
round the mould plates which were caused to move up and down by a cam arrange-
ment the object of my present invention is to supersede this arrangement without
greatly departing from much of the detail mechanism of such machines which
enables me to greatly reduce the complication of parts and to generally simplify
the machine.
According to my invention. I use three four or more mould plates but by
preference four which are fixed equidistant apart around a suitable shaped support
revolving horizontally on a vertical spindle made to move intermittently and this is
accomplished by means of a star cam fixed at the end of the spindle working in a
stud fixed to a circular disc and driven by means of a hevel wheel fixed underneath
gearing with another bevil wheel fixed onto a shaft running parallel with and between
the framework of the machine which shaft is driven by means of a bevil wheel fixed
to one end and gearing with another bevil wheel fixed onto the main shaft running at
right angles to the other, and provided with a driving pulley. Fixed on to the other
end of the shaft running between the framework is another bevil wheel which gears
into a bevil wheel fixed onto one end of a perpendicular shaft and supported at both
ends by brackets connected to the framework. Fastened to the other end of this
shaft is another bevil wheel gearing into a bevil wheel fixed to one end of a shaft
running parallel with and above the framework and supported by suitable brackets.
When the spindle carrying the paper roll has been placed in its bearings at the front
end of the machine and the machine set in motion the paper passes between the
drawing off rollers the top one of which is fixed in flexible adjustable bearings it then
passes over the usual smaller paste roller and thence to the larger paste roller after
which it passes under the knife which cuts off the required length which length is
then situated above the top of a stationary circular table supported by suitable
brackets fixed to the framework supported by the usual gauge plate and underneath
the mould plate opposite. The side feeders are then operated by means of two cams
fixed on the parallel shaft above the framework and fold the sides of the paper around
the mould plate. The portion of the stationary table immediately underneath the
usual gauge plate is hinged and hangs down until the gauge plate has been withdrawn
in the usual manner when the hinged part which I call the flapper plate is lifted up by
a lever hinged to the bottom part of the framework and operated by a can fixed on
the shaft running between the framework and this flapper plate holds the paper
around the mould plate, until it has passed onto the other portion of the stationary
table and come opposite the usual tube opener when the stops or paper holders are
ifted up by a lever hinged to the framework and operated by a cam fixed on the.
parallel shaft between the framework, holding the paper firmly around the mould
olate, at the same time another gauge plate is operated in the usual manner which
auges the amount of paper which has to be folded in by the two creasers fastened

page_text: to perpendicular spindles running in suitable bearings supported by the framework
and operated by bevel wheels gearing with bevil wheels fixed on the ends of the
two supplementary shafts suitably supported and on the other ends of these shafts
are two other bevil wheels which in their turn gear with two bevil wheels fixed on
the parallel shaft above the framework. After the gange plate has been operated
the tube opener which is carried by a lever hinged to a suitable bracket fixed
to the framework and operated by another lever working in a cam mounted on a
bracket which cam is operated by another cam fixed on the parallel shaft above
the framework, separates or opens the ends of the paper so as to allow the right
hand creaser and then the left hand creaser to form the first folds of the bottom of
the bag.
Then the mould plate travels on until it arrives at what are called the
squarer fingers" which gauge the amount to be turned over by what are termed
the "corner folders." The inmost "squarer finger" is fixed and carried by a bracket
connected to the framework but the other "squarer finger" which is carried by the
same bracket is allowed to swivel so that when the mould plate continues its circular
motion it does not unfold the corner which has been turned over it by the "corner
folder." This "squarer finger" is held in its straight position by a lever pressing
against a projection which lever is released at the right time by another lever
pivotted to the framework and operated by a cam fixed on the parallel shaft above
the framework. Before the "squarer finger" is moved the corner folders are
operated by another cam also fixed to the parallel shaft and these "corner folders"
turn over the corner which operation completes the folds which form the bottom
of the bag. After this operation has been performed the pivotted "squarer finger
is moved thus allowing both "squarer fingers" to be withdrawn from under the
folded corners as the mould plate continues round when it arrives opposite the
drawing off rollers which draw the bag off the mould plate in a finished state.
The drawing off rollers are fixed to a perpendicular bar or lever hinged at the other
end to the bottom part of the framework. This bar or lever is fastened at about
the centre to another bar running at right angles with a stud or projection at the
other end working in a cam fixed on the parallel shaft running between the frame-
work which motion causes the drawing off rollers to move to and from the mould
plate. These rollers are revolved by a belt passing over one of two pulleys fixed
on the bracket which supports the bottom end of the perpendicular bar or lever the
other pulley being driven by a belt passing over a pulley fixed on the parallel shaft
running between the framework. Each mould plate as it comes opposite the knife
receive a sheet of paper which travels round as bereinbefore described by which means
four bags are turned out of the machine with every revolution of the support on
which the mould plates are fixed but as stated at the commencement any number of
mould plates may be used by altering the mechanism to suit such number.
Dated this 15th day of July 1896.
"
GEORGE
BARKER,
77 Colmore Row, Birmingham, Agent.
I, FRANCIS DIXON BUMSTED, of Hednesford, in the County of Stafford, Mechanical
Engineer, do hereby declare the nature of my said invention and in what manner
the same is to be performed to be particularly described and ascertained in and by
the following statement :-
My invention has for its object improvements in machinery for making paper bags
and has special reference to that class of paper bags known as square bottom bags.

page_text: Machines for this purpose have generally been characterised, in one of the main
features at any rate, by the use of revolving plates for holding the paper when folded
round the mould plates, which were caused to move up and down by a cam
arrangement, and the object of my present invention is to supersede this arrangement
without greatly departing from much of the detail mechanism of such machines,
which enables me to greatly reduce the complication of parts and to generally simplify
the machine.
According to my invention I use three, four or more mould plates, but by
preference four, which are fixed equidistant apart around a suitably shaped support
revolving horizontally on a vertical spindle made to move intermittently, and this is
accomplished by means of a star cam fixed at the end of the spindle working on a
stud fixed to a circular disc and driven by means of a bevel wheel fixed underneath
gearing with another bevel wheel fixed on to a shaft running parallel with and
between the framework of the machine. This shaft is driven by means of a bevel
wheel fixed to one end and gearing with another bevel wheel fixed on to the main
shaft running at right angles to the other and provided with a driving pulley.
Fixed on to the other end of the shaft running between the framework is another
bevel wheel which gears into a bevel wheel fixed on to one end of a perpendicular
shaft and supported at, both ends by brackets connected to the framework. Fastened
to the other end of this shaft is another bevel wheel gearing into a bevel wheel
fixed to one end of a shaft running parallel with and above the framework and
supported by suitable brackets. When the spindle carrying the paper roll has been
placed in its bearings at the front end of the machine and the machine set in motion
the paper passes between the drawing off rollers, the top one of which is fixed in
flexible adjustable bearings; it then passes under the usual smaller paste roller and
thence under the larger paste roller, after which it passes under the knife which cuts
off the required length, which length is then situated above the top of a stationary
circular table supported by suitable brackets fixed to the framework, and supported
by the usual mould plate underneath the gauge plate opposite. The side folders are
then operated by means of two cams fixed on the parallel shaft above the framework
and fold the sides of the paper around the mould plate. The portion of the stationary
table immediately underneath the usual gauge plate is hinged and hangs down until
the side folders have folded the paper around the mould plate in the usual manner,
when the hinged part, which we call the flapper plate, is lifted up by a lever hinged
to the bottom part of the framework and operated by a cam fixed on the shaft
running between the framework, and this flapper plate holds the paper around the
mould plate until it has passed on to the other portion of the stationary table and
come opposite the usual tube opener, when the stops or paper holders are lifted up by
a lever hinged to the framework and operated by a can fixed on the parallel shaft
between the framework, holding the paper firmly around the mould plate, at the same
time another gauge plate is operated in the usual manner, which gauges the amount
of paper which has to be folded in by the two creasers, fastened to perpendicular
spindles running in suitable bearings, supported by the framework and operated by
bevel wheels gearing with hevel wheels fixed on the ends of two supplementary shafts
suitably supported, and on the other ends of these shafts are two other bevel wheels
which in their turn gear with two bevel wheels fixed on the parallel shaft above the
framework. After the gauge plate has been operated, the tube opener, which is
carried by a lover hinged to a suitable bracket fixed to the framework and operated
by another lever working in a cam mounted on a bracket, which cam is operated by
another eam fixe! on the parallel shaft above the framework, separates or opens the
ends of the paper so as to allow the right hand creaser and then the left hand creaser
to form the first folds of the bottom of the bag. Then the mould plate travels on
until it arrives at what are called the squarer fingers which gauge the amount to be
turned over by what are termed the corner folders. The inmost squarer finger is
fixed and carried by a bracket connected to the framework, but the other squarer
finger, which is carried by the same bracket, is allowed to swivel so that when the
mould plate continues its circular motion it does not unfold the corner which has been

page_text: turned over it by the corner folders. This squarer finger is held in its straight
position by a lever pressing against a projection, which lever is released at the right
time by another lever pivotted to the framework and operated by a cam fixed on the
parallel shaft above the framework. Before the squarer finger is moved the corner
folders are operated by another cam also fixed to the parallel shaft, and these
corner folders turn over the corners, which operation completes the folds which form
the bottom of the hag. After this operation has been performed the pivotted squarer
finger is moved, thus allowing both squarer fingers to be withdrawn from under the
folded corners as the mould plate continues round, when it arrives opposite the drawing
off rollers, which draw the bag off the mould plate in a finished state.
drawing off rollers are fixed to a perpendicular bar or lever hinged at the other end
to the bottom part of the framework. This bar, or lever is fastened at about the
centre to another bar running at right angles with a stud or projection at the
other end working in a cam fixed on the parallel shaft running between the frame-
work, which motion causes the drawing off rollers to move to and from the mould
plate. These rollers are revolved by a belt passing over one of two pulleys fixed on
the bracket which supports the bottom end of the perpendicular bar or lever, the
other pulley being drawn by a belt passing over a pulley fixed on the parallel shaft
running between the framework.
In order that my invention may be clearly understood and more easily carried into
practical effect I have appended hereunto eight double-sized sheets of drawings upon
which I have fully illustrated my improvements.
Figure 1 is a side elevation of my improved paper bag making machine.
Figure 2 is a back end elevation of Figure 1.
Figure 3 is a plan view showing the action of the "squarer" fingers and corner
folders.
Figure 4 is a plan view of the side folders and the stationary circular table.
Figure 5 is a plan view of the paper roll and the rollers which draw off the
paper.
Figure 6 is an end elevation of the rollers for drawing off the finished bag.
Figure 7 is a side elevation of the tube opener.
Figure 8 is a plan view of Figure 7.
Figure 9 is a front elevation of the creasers which form the first folds of the
bottom of the bag..
Figure 10 is a plan view of the right hand creaser.
In carrying my invention into practice I secure three, four or more mould plates A,
but by preference four, at equal distances apart, around the support B, revolving
horizontally on the vertical spindle C, which is made to move intermittently by the
star cam c fixed at the bottom end of this spindle working on the stud e² fixed to
the circular disc D and driven by means of the bevel wheel E fixed underneath
gearing with the bevel wheel e secured on the shaft F running parallel with and
between the two sides of the frame G. This shaft is driven by means of the bevel
wheel e fixed to the front end and gearing with the bevel wheel e, which is fixed
to one end of the main driving shaft H, running at right angles to the other shaft,
and on the other end of this shaft is fixed the driving pulley. On the opposite end
of the shaft F is fixed another bevel wheel e gearing into the bevel wheel e fixed on
to the bottom end of the perpendicular shaft f, which is carried or supported in the
two brackets and connected to the frame G. Secured on the top end of this
shaft is another bevel wheel e gearing into the bevel wheel e fixed to one end of the
shaft J running parallel with and above the frame G and supported by the brackets
or standards and. When the spindle K, upou which the roll of paper
placed for making the bags, has been mounted in its bearings and at the
front or feeding end of the machine and the machine set in motion, the paper
passes between the drawing off rollers L and L', the top one L being mounted in
the flexible and adjustable bearing which slides up and down in the carriers so as
to compensate for any extra drag. The paper then passes under the usual narrow
paste roller M which deposits paste on the side of the paper for joining the seam of
is

page_text: the bag, and thence under the large paste roller M', when pasto is deposited on the
paper where the folds of the botton join, after which it passes under the usual
kuife which cuts off the required length and deposits it under the usual movable
gauge plate.
This length of paper from which the bag is formed is now situated above the
stationary circular table N, which is supported by the brackets a fixed to the
frame G and over one of the mould plates Z as described in my previous Patent
No. 5372 of 1881 which is timed to be opposite. The side folders O, which are
pivotted at o' and o to suitable brackets attached to the frame are operated by the
two cams P and P' fixed on the parallel shaft J, then fold the sides of the paper
around the mould plate. The portion n' of the stationary table immediately under
the usual gauge plate attached to the rod 2 and actuated by the cam is hinged
and hangs down (as shown at Figure 1) until the side folders have folded the paper
around the mould plate in the usual manner, when the hinged part a', which I call
the flapper plate, is lifted up by the lever P', 'which is hinged at the bottom end at p
to the bottom part of the frame G and operated by the cam R fixed on the shaft F,
and this flapper plate n' holds the paper around the mould plate until it has traversed
on to the other portion of the circular stationary table, when the flapper plate drops
again ready for the next piece of paper to be operated upon.
The mould plate then travels round with the paper wrapped around it until it comes
opposite the usual tube opener S, which is clearly shown at Figures 7 and 8 on Sheet 7,
when the stops or paper holders a are lifted up by the lever a, which is hinged about
the centre at s to the frame G and operated by the cam f' fixed on the shaft F,
which is timed for that purpose. These stops hold the paper firmly around the
mould plate, and at the same time the gauge plate attached to the lever at and
operated by the cam X fixed on the shaft J comes forward and gauges the amount of
paper to be folded in for forming the bottom of the bag by the two creasers and
secured to the bottom ends of the perpendicular spindles and respectively as
clearly shown at Figure 9 on Sheet 8, which are supported in the bearings and a
mounted on the frame G. On the top end of each of these spindles is fixed a stud or
projecting piece with a small roller so and s" which travel up and down the inclines s
and a formed. on the top of the collars a" and ". Fixed on these spindles above the
frame are two bevel wheels s¹ and s", which gear with the bevel wheels 18 and s
fixed on the ends of two supplementary shafts supported in suitable standards, and
on the other ends of these supplementary shafts are two other bevel wheels gearing
into two bevel wheels fixed on the shaft J.
After the gauge plate has been operated, the tube opener S, which is carried by
the lever binged at " to the bracket ", fixed on the top of the frame G, is
operated by the lever hinged to the lever and working in a cam mounted in a
bracket, which cam is operated by another cam fixed on the shaft J, separates or
opens the ends of the paper so as to allow the right hand creaser s and then the left
hand creasers to form the first folds of the bottom of the bag. The stop piece $25
is provided so as to regulate the distance the tube opener has to advance. The
collar 24, which is fixed to the bottom end of the spindle s, has a curved slot 26
formed on one side (see Figure 10 Sheet 8) to which the creaser is attached so as
to allow it to be adjusted. After the creasers have formed the first folds in the
bottom of the bag they are lifted out of the way of the bag as the rollers 10 and sit
travel up the inclines 2 and 13. Then the mould plate travels on until it arrives
underneath what are called the "squarer" fingers T and T', which gauge the
amount of the corners of the bag bottom to be turned over by the corner folders U
and U', as clearly shown at Figure 3 Sheet 3. The squarer finger T is fixed to the
bracket connected to the frame, but the squarer finger T is pivotted at to this
bracket and is allowed to swivel, so that when the mould plate continues its circular
motion it does not unfold the corner of the bag bottom which has been turned over
it by the corner folders. This squarer finger T is held in its straight position by the
lever t pivotted at t to the frame G, the end of which presses against the projec-
tion formed at the back of the squarer finger and this lever t, which is held against

page_text: is
the squarer finger by the lever, is palled out of contact with the squarer finger by
the spring as soon as the lever is released at the proper time; this lever
pivotted at to the frame and operated by the levers to, e, and t, the latter of
which is also pivotted to the frame at t, and these levers are all actuated by the
stud which works in the cam te fixed on the shaft J. The same levers which are
operated for holding and releasing the squarer Singer T operate the corner
folders U and U', so that these corner folders fold or turn over the corners of
the bag bottom before the squarer finger is released. The finger Z, which is
hinged at to the frame and operated by the lever t8, lifts up the corner of the
bag so as to enable the corner folder U to easily turn or fold the corner over,
which operation completes the folds which form the bag. After the bag has been
completed the squarer finger T is released in the manner as previously described, thus
-allowing both squarer fingers to be withdrawn from under the folded corners as the
mould plate continues round until it comes opposite the drawing off rollers W and W,
which draw the bag off the mould plate in a finished state as shown at Figure 6
Sheet 6. These drawing off rollers are fixed to one end of the perpendicular bar or
lever to hinged at the other end at w to the bracket w' fixed to the bottom part of the
frame G. This bar or lever is pivotted at w to one end of the lever to running at
right angles, the other end of which is provided with the stud or projection w working
in the cam X fixed on the parallel shaft F, which motion causes the bar or lever and
consequently the drawing off rollers to move to and from the mould plate. These
drawing off rollers are driven by the belt a passing over the pulley mounted in
the bracket and over the pulley to mounted at the side of the drawing off rollers.
Motion is imparted to the pulley by means of a helt passing over another pulley
mounted on the same axis and over a pulley mounted on the shaft F.
Each mould plate as it comes opposite the knife receives a sheet of paper, which
travels round with the mould plate in the manner as hereinbefore described, by which
means four complete bags are turned out of the machine at every revolution of the
support on which the mould plates are fixed, but as previously stated any convenient
number of mould plates may be used by altering the mechanism to suit such
number.
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 :-
CLAIMS.
First. In a machine for making paper bags mounting one of the drawing off
rollers in flexible adjustable bearings so as to compensate for any extra drag on the
paper as it is drawn off the roll in the manner substantially as hereinbefore described
and as shown upon the accompanying sheets of drawings.
Second. In a machine for making paper bags the stationary circular table
supported on suitable brackets around which the mould plates travel, the paper from
which the bags are formed being held around the mould plates by the said table in
the manner and for the purpose substantially as herein hefore described and as shown
upon the accompanying sheets of drawings.
Third. In a machine for making paper bags hinging the front or entrance end
of the stationary circular table so that as the mould plate advances to receive the
paper the hinged part falls until the side folders have wrapped the paper aroun
and is lifted again by a lever in the manner substantially as herein set forth and as
shown upon the accompanying sheets of drawings.
Fourth. In a machine for making paper bags operating the hinged portion or
flapper plate of the stationary table by a lever actuated by a cam in the manner and
for the purpose substantially as bereinbefore described and as shown upon the
accompanying sheets of drawings.
Fifth. In a machine for making paper bags the side folders for folding the ends
of the paper around the mould plate operated by means of cams and levers in the

page_text: manner and for the purpose substantially as hereinbefore described and as shown upon
the accompanying sheets of drawings.
Sixth. In a machine for making paper bags the stops or paper holders operated
by a hinged lever and cam for holding the paper around the mould plate until the-
first folds or creases have been made in the manner substantially as hereinbefore.
described and as shown upon the accompanying sheets of drawings.
Seventh. In a machine for making paper bags operating the "tube opener" by a
lever actuated by a cam in the manner and for the purpose substantially as herein set.
forth and as shown upon the accompanying sheets of drawings.
Eighth. In a machine for making paper bags the creases for forming the first folds.
operated by suitable gearing so that as they revolve they rise and fall in the manner
and for the purpose substantially as hereinbefore described and as shown upon the-
accompanying sheets of drawings.
Ninth. In a machine for making paper bags making one of the creasers adjustable
so as to regulate the first crease or fold substantially as herein before described and as
shown upon the accompanying sheets of drawings.
Tenth. In a machine for making paper bags pivotting the outer squarer finger in
the manner and for the purpose substantially as hereinbefore described and as shown
upon the accompanying sheets of drawings."
Eleventh. In a machine for making paper bags holding and releasing the pivotted
squarer finger in the manner substantially as hereinbefore described and as shown.
upon the accompanying sheets of drawings.
Twelfth. In a machine for making paper bags the corner folders operated in the
manner and for the purpose substantially as herein before described and as shown
upon the accompanying sheets of drawings.
Thirteenth. In a machine for making paper bags the pivotted finger for lifting the
corner of the bag operated in the manner substantially as herein before described and
as shown upon the accompanying sheets of drawings.
Fourteenth. In a machine for making paper bags mounting and operating the
drawing off rollers in the manner substantially as hereinbefore described and as shown
upon the accompanying sheets of drawings.
Fifteenth. The improvements in machinery for making paper bags substantially as
herein before described and as shown upon the accompanying sheets of drawings.
Dated this 5th day of Abril 1897.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant..