IMPROVEMENTS IN MACHINERY FOR MAKING SQUARE OR BLOCK BOTTOM PAPER BAGS
Year: 1881

page_text: LETTERS PATENT to Francis Dixon Bumsted, of Hednesford, in the County
of Stafford, for an Invention of "IMPROVEMENTS IN MACHINERY FOR
MAKING SQUARE OR BLOCK BOTTOM PAPER BAGS,"
"
PROVISIONAL SPECIFICATION left by the said Francis Dixon Bumsted at
the Office of the Commissioners of Patents on the 8th December 1881.
_FRANCIS DIXON BUMSTED, of Hednesford, in the County of Stafford.
'IMPROVEMENTS IN MACHINERY FOR MAKING SQUARE OR BLOCK BOTTOM PAPER
BAGS."
•
My improvements refer to improved machinery whereby bags are made in three
four or more processes or operations.
According to my Invention I use three four or more mould plates which are
placed and fixed equidistant round a wheel or suitable shaped support which
revolves horizontally upon a vertical spindle the movements of same are inter-
mittent making one revolution in three four or more movements. Each mould
plate has a thin metal sheet hinged upon it which comes in contact with and partly
covers the mould plate the front edge of which is the line where the bag is folded
back in the process of forming the bottom of the bag. This plate which is hinged
upon the mould plate and caused to come into working position and released by
the moving of the mould plates spindle together with a circular rail fixed over it
which at parts is shaped to give the required movement to the plate.
The parts and movements required to complete the whole process I will now
describe in their turn commencing with the first which is as follows:-
A roll or reel of paper is placed on a spindle in frame of machine and is drawn
forward by top and bottom rolls intermittently and is pasted on one edge length-
ways by a wheel partly moving in a box of paste and partly running on the paper
the paper is also mechanically pasted at certain parts at right angles to the length
of paper in suitable positions to secure the bottom of the bag when folded. These
rolls making a necessary turn sufficient paper is drawn forward (in a line from
point to back of mould plate) to make one bag which length of paper is projecting

page_text: beyond the knife and over the first mould plate. The cut now takes place in front
or at point of mould plate and leaves the sheet of paper upon the mould plate
which is held in place by the metal sheet which has come down upon it.
The projecting sides of paper are now pressed down by two moving arms and
immediately two folders come towards the centre of mould plate folding the two
sides under mould plate thus forming a tube. This process being complete the
spindle on which the moulds are fixed is caused to make a quarter of a revolution
or any suitable part of a revolution when the next process comes into action upon
the partly formed bag (the second mould plate now comes into the place of the
first). The second process or operation is the opening of the mouth of the tube
which is done by a rod with suitable shaped end being brought into it and
mechanically drawn up with the mouth of the tube upon it then immediately two
folders on vertical spindles revolve or partly revolve upon the sides of the open
tube and lay each side down flat. This process or operation being complete the
third is commenced after the mould plate has made another quarter turn (now the
third mould plate is in the first position to receive the paper as first described).
The third process or operation is the turning over of the tips or corners of the
bottom of bag which may either be done as the mould plates turn by fixed folders
or by moving folders worked by cams in either way a guide is placed over the
square (now laid down by folders in last process) as a gauge over which the corners
are folded.
The fourth process or operation is commenced when the mould plate has made
the necessary turn. This process is the drawing off of the bag now formed which
is done by a pair of rollers upon a movable guide which comes forward to front
part of bag and draws it off the mould plate between these rolls.
The first mould plate next moves to the position where it was first acted upon
and receives a second sheet of paper as the other mould plates have done in their
turn so by these means the manufacture of these bags is completed in four processes
or operations but as first stated any suitable number of mould plates may be used
so dividing the whole process into a number of processes to agree with number of
mould plates used.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Francis Dixon Bumsted in the Great Seal Patent Office on the
8th June 1882.
FRANCIS DIXON BUMSTEAD, of Hednesford, in the County of Stafford.
"IMPROVEMENTS IN MACHINERY FOR MAKING SQUARE OR BLOCK BOTTOM PAPER
BAGS."
My improvements refer to improved machinery whereby bags are made in three
four or more processes or operations all as hereinafter described.
According to my Invention I use three four or more mould plates which are
placed and fixed equi-distant round a wheel or suitably shaped support which
revolves horizontally upon a vertical spindle the movements of same are inter-
mittent making one revolution in three four or more movements. Each mould
plate has a thin metal sheet hinged upon it which comes in contact with and
partly covers the mould plate the front edge of which is the line where the bag is
folded back in the process of forming the bottom of the bag. This plate which is
hinged upon the mould plate and caused to come into working position and
released by the moving of the mould plates spindle together with a circular
rail fixed over it which at parts is shaped to give the required movement to the
plate.
The parts and movements required to complete the whole process I will now
describe in their turn commencing with the first which is as follows:-
A roll or reel of paper is placed on a spindle in frame of machine and is drawn
forward by top and bottom rolls intermittently and is pasted on one .edge length-
ways by a wheel partly moving in a box of paste and partly running on the paper.
The paper is also mechanically pasted at certain parts at right angles to the length
of paper in suitable positions to secure the bottom of the bag when folded. These
rolls making a necessary turn sufficient paper is drawn forward (in a line from
point to back of mould plate) to make one bag which length of paper is projecting
beyond the knife and over the first mould plate. The cut now takes place in front
or at point of mould plate and leaves the sheet of paper upon the mould plate
which is held in place by the metal sheet which has come down upon it.
The projecting sides of paper aro now pressed down by two moving arms and
immediately two folders come towards the centre of mould plate folding the two
sides under mould plate thus forming a tube.
This process being complete the spindle on which the moulds are fixed is caused
to make a quarter of a revolution or any suitable part of a revolution when the
next process comes into action upon the partly formed bag (the second mould plate
now coming into the place of the first). The second process or operation is the
opening of the mouth of the tube which is done by a rod with suitable shaped end
being brought into it and mechanically drawn up with the mouth of the tube upon
it then immediately two folders on vertical spindles revolve or partly revolve upon
the sides of the open tube and lay each side down flat. This process or operation
being complete the third is commenced after the mould plate has made another
quarter turn (now the third mould plate is in the first position to receive the paper
as first described.)
The third process or operation is the turning over of the tips or corners of the
bottom of bag which may either be done as the mould plate turns by fixed folders
or by moving folders worked by cams in either way a guide is placed over the
square (now laid down by folders in last process as a gauge over which the corners
are folded.
The fourth process or operation is commenced.when the mould plate has made

page_text: the necessary turn. This process is the drawing on or the bag now formied which
is done by a pair of rollers upon a movable guide which comes forward to front
part of bag and draws it off the mould plate between these rolls. The first mould
plate next moves to the position where it was first acted upon and receives a
second sheet of paper as the other mould plates have done in their turn so by these
means the manufacture of these bags is completed in four processes or operations
but as first stated any suitable number of mould plates may be used so dividing
the whole process into a number of processes to agree with number of mould plates
used.
Figure 1 of the accompanying Drawings is a view in plan of so much of a
machine constructed according to my Invention for making square bottomed paper
bags as will be necessary to illustrate the manner in which the Invention may be
conveniently carried into effect Figure 2 is a side elevation of the same machine.
Figure 3 is an end view Figure 4 is a view in plan of the mould boards support
and plates and parts connected thero with and Figure 5 is a detail view of the
catch and mechanism for holding corner of bag in position when acted on by the
presser.
Similar letters of reference refer to like parts in all the Figures.
A' A3 A³ A' are the mould plates B is the mould plates support and B¹ is the
spindle on which the same is carried and revolves C C are the thin hinged metal
plates above the mould plates D D indicate the position of the gauge lines of the
mould plates D' D' are the paste distributing wheels F is the paper cutting knifo
H is the swinging bar for opening the tube I is the presser for pressing the paper
between guides J J and K K are the guides L L are the bag taking off rollers
M M are the turning over folders N is the revolving arm on the main shaft Q and
P is the quick screw for communicating motion to the mould plate support Qis
paper holder R is the knife arm K is back guide and S catch for holding corners
of bag during action of presser T is lever to keep the folded paper on hinged plato
V circular guide for preventing bag opening while mould plate is down. The
driving mechanism is of the ordinary construction and arrangement and will be
easily understood by reference to the Drawings except that referring to the working
of the intermittent motion given to the screw P and thence to the mould plates
which will be describod further on.
As before described according to my Invention bags are made in three four or
more processes working simultaneously by using three or more mould plates on
which the bags are formed after being cut. These mould plates A' A² A³ A¹.
Figures 123 and 4 are fixed equidistant round a suitably shaped support B.
Figures 23 and 4 which revolves horizontally together with a vertical spindle but
the movements of this spindle and the parts in connection therewith are intermittent
making one revolution in three four or more movements according to the number
of mould plates used. Over or above each mould plate a piece of thin sheet
metal C Figures 1 2 3 and 4 is fixed by hinges which allow it to come in contact
with mould plate when required and at other suitable times to be lifted away
from the mould plate. The front edge D Figures 1 and 4 of the plate forms a line
or gauge where the bag is first folded to when the bottom of bag is being formed
of these
further in describing the mould plate the middle. parts E Figures 1 and
when in operation slide a certain distance suitably first to form a gauge over which
the front of bag is folded and in the next process to have been withdrawn from
the point of bag (now folded) so as to allow of this part of the bag being acted
upon or folded by the next process.
The mechanism which I provide for folding the paper to form the bag upon the
mould plate I will now explain. The paper may be in a roll or reel or in sheets
placed upon the mould plate one at a time by hand or machinery but I describe
the machine as working from a roll. The roll of paper is placed on the spindle at
a suitable part of machine and is drawn off by revolving rollers as on other bag
machines but intermittently i.e. the length of paper required is drawn off the reel
the exact length required the paper between these rolls then remains stationary

page_text: during a certain portion of a revolution of the main shaft of machine but the reel
during this time is being impelled by the mechanism shown on Drawing Figure 2
by this arrangement the paper can be drawn up onto the mould plate quickly
without turning the reel while the paper is being drawn up and over the mould
plato a narrow wheel partly revolving in a paste box and partly upon the paper
deposits a broad line of paste upon one side of the paper also while the paper
between the rolls is at rest paste is deposited at several points at right angles
with the broad line just mentioned by the paper being lifted by a narrow bar
under it and brought in contact with a cylinder partly covered with paste (this
cylinder partly revolves in a box of paste and doctors are arranged so as to clear
some parts of this roll as it revolves) The paper when pasted as described is
drawn forward and onto the mould plate and cut off by a suitable knife F
Figure 1. The plate before mentioned over the mould plate C is pressed against
the mould plate this plate having its odges turned down or having inovable pieces
on the two sides grips the paper upon the mould plate and at the same time
presses the two overhanging sides of paper down below the level of the mould plate
and while in this position a slide on either side of machine is brought from side to
centre of machine catches the overhanging parts of paper and folds one after the
other under the mould plate this forms what is called the tube see G' Figure 4.
While the foregoing process is in operation the second process is in operation
upon a tube already formed in the manner described and has been brought into
position while upon its mould plate by the movement of the first mentioned
spindle carrying the mould plates. This second process upon the tube is the
opening and folding of the tube so as to partly form the bottom which when
complete is in shape as shown on detail drawing G Figure + the opening of the
tube is effected by a swinging bar H Figures 12 and 3 with a suitably shaped
end being pressed into the tube and while held open by this a folder H Figure 1
upon either side partly revolves one following the other and at the same time the
bar which has opened the tube is caused to partly revolve and by these means
disengages itself while the two folders turn and lay the paper flat in position and
shape as shown on detail Drawing G³ Figure 4.
While this second process is in operation the third process is in operation upon
the partly formed bag which has been effected as just described and has been
brought into position while upon its mould plate by the movement of the mould
plate spindle and so on. This third process is the part folding of the two corners
called the tips and when complete has the position and shape as shown on detail
Drawing G Figure 4 and G Figure 5. This process is effected by a pressor I
Figures 1 2 3 and 5 which is caused to press the paper between two guides J
Figures 123 and 5 and K. Figures 23 and 5 being placed above the mould plates
and hinged plate and by suitable circular guides the paper as it comes into position
is caused to mount these guides thus the paper is prepared for the press bar
descending. While this process is in operation the fourth is also in operation (this
is the taking off of the bag by the revolving rollers L Figures 1 and 3 being
brought in contact with the now formed bag) the inould plates have moved as at
each process described but before the fourth process comes into action an inter-
mediate process takes place during and caused by the mould plates moving and
this is the process of turning over by the aid of two circular plates which act as
folders M Figures 1 and 3 of the tips from position GS Figure 4 to the shape and
position as shown on detail Drawing G Figure 4. The foregoing describes the
whole process of forming the bag and as the completed bag is taken off by the
rollers L Figures 1 and 3 so the mould plates in turn are prepared by the last
process so as to receive the paper and commence the first process.
To obtain the intermittent movement of the mould plate spindle I provide a
revolving arm N Figure 3 fixed to main shaft O Figure 3, which comes in contact
with the edges of the quick screw P Figures 2 and 3 having four threads or more
according to the number of mould plates.
While the paper is being cut a paper holder Q Figure 1 which works with the
•

page_text: knife arm R Figures 1 and 2 is caused to como in contact with paper and hold it
in position until held by the hinged.plate C.
In the back guide K Figures 23 and 5 past which the press bar comes I
provide a catch S Figures 3 and 5 which gives way as the presser passes and
afterwards springs out when the presser lifts thus the corner of bag is secured and
kept in position as required for the intermediate process mentioned.
The arrangement which. works with the swing bar shown on Figures 1 and 3
marked T is a plan to come.into action after the swing bar has completed its work
and keeps the folded paper down upon the hinged plate until by the moving of
mould plates the bag is under a circular guido V.Figures 1 and 2 which prevents
the bag opening while the mould plates turn again.
The following parts are movable or adjustable to allow of making various sizes
of bags on one machine.".
The swing, bar H Figures 1.2 and 3 is adjustable and the folders W Figures 2
and 3 which work with it are movable. The press bar I Figures 123 and 5 and
guides J K Figures 123 and 5. back and front are adjustable. The sides of the
mould plates A A A A are changeable. The taking off rolls L Figures 1 and 3
are adjustable. The knife F Figure 1 is adjustable. The table having paste boxes
upon it is adjustable. The drawing .rolls.X Figures 1 and 2 are changeable. The
reel unwinder, Y Figure 2 is adjustable. The broad line paste box is adjustable.
Having now described the nature of my said Invention and in what manner
is to be performed. I declare that I claim as the aforesaid improved machinery
for making square or block bottomed paper bags-
First. The construction and employment of mould plates together with the
means of using same substantially as set forth.
Second. The means of turning the tips of bag by the presser and guides or
folders as described and the spring catch which holds tho back tip in position
after the presser rises.
Third. The mode of and means for bringing the taking off rolls while revolving
´into contact with the bag and afterwards withdrawing them while the bag is
between them substantially as set forth.
Fourth. The combination of parts forming the improved machine for making
square bottom bags substantially as described and as illustrated in the accom-
panying Drawings.
In witness whereof, I, the said Francis Dixon Bumsted, have hereunto set
my hand and seal, this Fifth day of June, in the year of our Lord One
thousand' eight hundred and eighty two.
FRANCIS DIXON DUMSTED. (5.)