Improvements in Machinery for the Manufacture of Paper Bags.
Year: 1894

page_text: Date of Application, 1st Nov., 1894
Complete Specification Left, 1st Aug., 1895-Accepted, 7th Sept.. 1895
PROVISIONAL SPECIFICATION.
Improvements in Machinery for the Manufacture of Paper Bags.
We, THE BURNLEY PAPER WORKS COMPANY LIMITED, Calder Vale,
Burnley, in the County of Lancaster, Paper Makers and Paper Bag Manu-
facturers, and JOHN BRADLEY of Sunnyholm, Burnley aforesaid, Auctioneer and
Valuer, do hereby declare the nature of this invention to be as follows:-
"
1
This invention relates to certain improvements in that class of machinery for
the manufacture of "rose or block bottomed paper bags, in which the paper
proceeds from a roll, is formed on a tube former, then passed through respective
draw and severing rolls, whereby it is cut and folded into bag shape, when it is
finally pasted and carried over a drying cylinder, the paper traversing uninter-
ruptedly through the machine at one uniform rate of speed.
The first part of our invention consists of improved means, whereby we are
enabled to obtain a squarer and less oblong shape to the bottom of the bag, which
is of great advantage to shopkeepers and others, who store goods in this class
of bag.
In this machine a finger or tucker and a tucker blade sliding in a slotted bracket
are usually employed for the formation of the first or diamond folds of the bag.
The finger is at present extended (in the form of a thin blade or wire) through
the second pair of draw rolls, and when the diamond or first folds have been made,
under existing arrangements, it is impossible to close them, or overlap one over
the other sufficiently, owing to this projecting portion of the finger.
In the present invention, the finger or tucker is shortened so as not to extend
through the draw rolls, and is preferably loosely mounted, so that when the diamond
fold has been completed, and the partially formed bag carried to the draw rolls,
the finger or tucker is capable of leaving the tucked folds of the bag horizontally
and through one end of such folds. By this means, the usual bracket and tucker
blade may be so arranged that a greater length of paper may be tucked in to
complete these folds consequently the bottom of the bag will be formed less oblong,
and as near as possible square. Just as the tucker is about to leave the partially
formed diamond or first folds of the bag, the latter is seized by the draw rolls,
between which it is then passed.
Our invention further relates to the severing rolls of bag machines, the cutting
blade of which has been hitherto formed with serrated teeth in order to penetrate
the paper. In our invention, we preferably employ only one severing roll-that
which carries the cutter. The cutter is made of the guilotine type, and is secured
to the roll at an angle or curve, so as to clean cut the paper, which, in order that
it will not be unevenly cut is also made to traverse through the machine at an
angle. The paper in traversing passes over a suitably disposed plate-in preference
to the second roll-against which the guilotine knife severs the length on its way
through the machine. In this way we obtain a perfectly parallel and clean cut
bag length, which is much to be desired in preference to the old serrated method
of cutting.
Dated this 31st day of October 1894.
F. RICHMOND,
12 Standish Street, Burnley, Agent for the Applicants.

page_text: Improvements in Machinery for the Manufacture of Paper Bags.
We, THE BURNLEY PAPER WORKS COMPANY, LIMITED, Calder Vale,
Burnley, in the County of Lancaster, Paper Makers and Paper Bag Manu-
facturers, and JOHN BRADLEY of Sunnyholm, Burnley aforesaid, Auctioneer and
Valuer, 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 certain improvements in that class of machinery for
the manufacture of " rose or block bottomed paper bags, in which the paper
proceeds from a roll, is formed on a tube former, then passed through respective
draw and severing rolls, whereby it is cut and folded into bag shape, when it is
finally pasted and carried over a drying cylinder, the paper traversing unin-
terruptedly through the machine at one uniform rate of speed.
Our invention relates to the severing rolls of such machines, the cutting blade
of which has been hitherto formed with serrated teeth in order to penetrate the
paper. In our arrangement, we preferably employ only one severing roll-that
which carries the cutter. The cutter is made of the guillotine type, and is secured
to the rolls at an angle or curve, so as to clean cut the paper passing through the
machine. The paper, in traversing, passes a suitably disposed plate-in preference
to the second roll-against which the revolving guillotine knife severs the length
on its way through the machine. In this way we obtain a perfectly parallel and
clean cut bag length, which is much to be desired in preference to the old serrated
method of cutting.
In the accompanying drawings,
Fig. 1 is a side elevation of the severing roll and stationary cutter plate, con-
structed in accordance with our invention. Fig. 2 is a plan view of the same,
and
Fig. 3 is a plan of the guillotine cutter only, shewing the angle at which it is
disposed with the roller shaft.
Referring to Figs. 1 and 2, A is the guillotine knife fixed to the lugs B of the
bosses C, secured by set screw D to shaft E. We also provide the said guillotine
knife with a shield F, fastened to lugs G, and bearing against the face of the
guillotine knife. This shield is for the purpose of backing up and steadying the
bag blank, until it is received by the tucker, which forms the bottom folds of
the bag. The shield also depresses the paper tube or bag length, closing it Hat
previous to being severed by the cutters, whereby a uniform cut is obtained.
Mounted on standards H is the stationary cutter plate J, which is bolted to
bracket K, adjustable in slot L of the said standards. Cutter plate J is likewise
provided with a shield M to serve as a guide for the partially formed bag previous
to cutting.
Fig. 3 is a plan representing the guillotine knife, disposed at an angle with the
shaft E by adjusting bosses C, so as to make a clean cut bag length without tearing
the paper, which at the time of severing is passing through the machine, and it is
evident, were it not for the angular adjustment of the cutter knife, together with
the clamping action of the shield in backing up, steadying and closing the paper
tube or bag length, the latter would be hopelessly torn.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a paper bag machine, the improved arrangement and construction of the

page_text: guillotine cutter roll A and stationary cutter plate J, substantially as described
and set forth.
2. In a paper bag machine, the improved combination of guillotine cutter roll A,
and stationary cutter plate J with shields F and M, substantially as and for the
purpose described and illustrated.
Dated this 30th day of July 1895
F. RICHMOND,
12, Standish Street, Burnley, Agent for the Applicants.