IMPROVEMENTS IN MACHINERY FOR MAKING PAPER BAGS
Year: 1876

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine, Lake, &
Co., Patent Agents, Southampton Buildings, London, for the Invention of
"IMPROVEMENTS IN MACHINERY FOR MAKING PAPER BAGS." A communi-
cation from abroad by Edward Stanley and George Joseph Harris, both of
Brooklyn. New York. United States of America.
ed the 29th December 1876, and dated the 30th October 1876.
PROVISIONAL SPECIFICATION left by the said William Robert Lake at the
Office of the Commissioners of Patents on the 30th October 1876.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN MACHINERY FOR MAKING
PAPER BAGS." A communication.
This Invention relates chiefly to mechanism by which the bottom lap of a partly
formed paper bag is creased, pasted, and finished; also to the mechanism by which
the blank is folded at the sides to form the middle lap.
A machine constructed according to this Invention has a movable bed plate and
frame, and standards which support in journals an oscillating paste box. Two
auger scrolls are arranged on the bed plate a distance apart equal to the width of
the bag to be formed; an apron travels between them over the bed plate, feeding
forward the blank, the opposite edges whereof strike the outer ends of these auger
scrolls, which catch, lift up, and bend over the edges of the paper as it is fed
forward, double it at the edges, and it passes under the long crease between the
bottom of each scroll and the, bed plate, thus folding the blank at the sides, and
forming a centre lap. Any suitable mechanism may be used for pasting down this
centre lap. This part of the said Invention relates only to the scrolls for the purpose
of forming the side folds.
After the bag is partly formed of a blank folder, and pasted with the centre
lap, and has a projecting lap for the bottom, it is ready for the action of the other
part of the said Invention.
The partly formed bag is fed forward by rollers to the main roller; the surface of
this main roller and the lower extremity of the horizontally oscillating paste holder

page_text: move with the same velocity and in the same direction as the advancing bag. As
the bag advances its bottom end comes in contact with the creasing blade, paste
roll, and detaching plate, and with an india-rubber roller, which is journalled at or
within the circumference of the aforesaid main roller. The roller edge of the creasing
blade extends down a little below the surface of the india-rubber roller, moves with
a greater velocity than the surface of the main roller, and as the creasing blade
presses in the paper at the folding line for the bottom lap to the surface of the india-
rubber roller it creases and bends up the bottom lap, and at the same time forces
the said roller to turn on its own axis and acquire a velocity equal to that of the
creasing blade while the paper is being creased, thereby preventing any slipping of
its edge on the paper.
The detaching plate has a vertical automatic oscillating movement around its
pivots; this motion is given to it by the contact of its edge with the bag and the
main roller when the paste holder is moving in the same direction as that of the
said roller; this action presses the detaching plate against the bottom of the paste
holder, which causes the paste roll to protrude through an opening left for that
purpose in the detaching plate, and come in contact with the bag at the place
where it should receive the paste for the bottom lap.
As the paste holder passes beyond the point of contact with the main roller the
pressure upon the said plate is relieved, and a spring on the upper side of the said
plate causes the same to re-assume the position in relation to the paste holder that
it had before coming in contact with the main roller; this action detaches the bag
from the paste roll and creasing blade. The bag, continuing its forward movement,
the bottom lap thus creased and pasted is laid down and firmly pressed upon the
body of the bag by the discharging rollers.
In some instances I may use a revolving paste holder.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Robert Lake in the Great Seal Patent Office on the 28th
April 1877.
66
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. IMPROVEMENTS IN MACHINERY FOR MAKING
PAPER BAGS." A communication from abroad by Edward Stanley and George
Joseph Harris, both of Brooklyn, New York, United States of America.
This Invention relates chiefly to mechanism by which the bottom lap of a
partly formed paper bag is creased, pasted, and finished; also to the mechanism by
which the blank is folded at the sides to form the middle lap.
In the accompanying Drawing Figure 1 is a side elevation, and Figure 2 is a
plan of a machine embodying this Invention.
Figure 3 is a vertical section drawn to an enlarged scale of a creasing blade and
detaching plate forming part of the said machine.
Figure 4 is a longitudinal vertical section, Figure 5 is a vertical transverse section,
and Figure 6 is an elevation shewing the gearing and a revolving instead of oscil-
lating paste holder, all as more fully herein-after set forth.
A represents the bed plate and frame of the machine; and B, the standards which
support in journals the oscillating paste box C; D, D, are two auger scrolls on the
bed plate, whose distance apart is equal to the width of the bag to be formed; an
apron E travels between them over the bed plate for feeding forward the blank; its
opposite edges strike the outer ends of these auger scrolls D, which catch, lift up,
and bend over the edges of the paper as it is fed forward, double it at the edges,
and it passes under the long crease between the bottom of each scroll and the bed
plate, thus folding the blank at the sides, and forming a centre lap. Any suitable

page_text: mechanism may be used for pasting down this centre lap. This part of the said
Invention relates only to the scrolls D, D, for the purpose of forming the side folds.
The construction of these auger scrolls is fully shown in Figure 2.
After the bag is partly formed from a blank folder, and pasted with the centre
lap, and has a projecting lap for the bottom, it is ready for the action of the other
part of the said Invention.
The partly formed bag is fed forward by rollers F and G to the main roller H.
The surface of this main roller H and the lower extremity of the horizontally oscil-
lating paste holder C are geared to move with the same velocity and in the same
direction as the advancing bag. As the bag advances its bottom end comes in
contact with the creasing blade I, paste roll J, and detaching plate K (all of which
are carried by the paste holder C), and with an india-rubber roller L journalled at
or within the circumference of the main roller H, as shown in Figure 4. The lower
edge of the creasing blade I extends down slightly below the surface of the roller L,
moves with a greater velocity than the surface of the roller H, and as the creasing
blade I presses the paper (at the folding line for the bottom lap) into the surface of
the india-rubber roller L it creases and bends up the bottom lap, and at the same
time forces the roller L to turn on its own axis, and acquire velocity equal to that
of the creasing blade while the paper is being creased, thereby preventing any slipping
of its edge on the paper.
The detaching plate K has a vertical automatic oscillating movement around its
pivots; this motion is given to it by the contact of its edge e with the bag and the
roller H when the paste holder C is moving in the same direction as the roller H;
this action presses the detaching plate K against the bottom of the paste holder C,
which causes the paste roll J to protrude through an opening left for that purpose in
plate K, and come in contact with the bag at the place where it should receive the
paste for the bottom lap.
As the paste holder C passes beyond the point of contact with the roller H the
pressure upon the plate K is relieved, and a spring s upon the upper side of the
plate K causes the said plate to re-assume the position in relation to the paste
holder C that it had before coming in contact with roller H; this action detaches
the leg from the paste roll J and creasing blade I. The bag, continuing its forward
movement, the bottom lap thus creased and pasted is laid down and firmly pressed
upon the body of the bag by the discharging rollers O, O.
I prefer the oscillating paste holder, but the paste holder may be constructed and
arranged to revolve as shown in Figure 6.
By means of this Invention I am enabled to crease, paste, and press down the
bottom lap of paper bags in a good, cheap, and quick manner.
Having thus fully described the said Invention as communicated to me by my
foreign correspondents, and the manner of performing the same, I wish it understood
that I claim,-
First. A paper bag machine, which has an india-rubber surfaced roller journalled
at or within the circumference of the main roller, and which has a paste roll, a
detaching plate or frame, and an oscillating or revolving paste holder combined and
operating as above set forth and for the purpose specified.
Second. The india-rubber roller in combination with the detaching plate, and the
revolving or the oscillating paste holder, as above specified and for the purposes set
forth.
Third. The creasing blade in combination with the detaching plate and the india-
rubber roller, as above specified and for the purposes set forth.
Fourth. The oscillating or the revolving paste holder in combination with the
creasing blade, the detaching plate, the india-rubber roller, and main roller, as above
specified and for the purposes set forth.
Fifth. The auger scrolls in combination with the bed plate of a paper bag
machine and feeding mechanism, as above specified and for the purposes set forth.
Sixth. A machine consisting of the part shewn in the accompanying Drawing,

page_text: constructed, combined, and operating for creasing, pasting, and pressing the lap to
form the bottoms of paper bags, as above set forth.
In witness whereof, I, the said William Robert Lake, have hereunto set my
hand and seal, this Twenty-eighth day of April, in the year of our Lord One
thousand eight hundred and seventy-seven.*
W. ROB. LAKE. (L.S.)