A Means of Dividing Paper as it is being Formed into a Con- tinuous Length on a Paper Making Machine into two or more Narrow Lengths. ON A PAPER MAKING MACHINE INTO TWO OR MORE NARROW LENGTHS
Year: 1885

page_text: A Means of Dividing Paper as it is being Formed into a Con-
tinuous Length on a Paper Making Machine into two or
more Narrow Lengths.
. ..
:
I, WILLIAM PATRICK BRUCE of Kinlieth, in the County of Midlothian, Paper
Maker do hereby declare the nature of my invention for "A MEANS OF DIVIDING
PAPER AS IT IS BEING FORMED INTO A CONTINUOUS LENGTH ON A PAPER MAKING
MACHINE INTO TWO OR MORE NARROW LENGTHS "to be as follows:-..
"
When paper is manufactured in continuous lengths it is often required to: slit
the continuous length of paper into two or more lengths of lesser width. Ordinarily
this is done in a cutting machine after the paper has passed from the machine on
which it has been made.
.:
According to my invention I effect the slitting of the paper into two or more
widths whilst it is in process of being made, by the use of a fine jet or jets of
water directed against its surface as it comes in a moist condition along the paper
making machine. Where the fine jet strikes the paper it cuts a small hole through
it and consequently as the paper moves onwards the paper is slit lengthwise into
strips of any desired width.
1
Preferably I set the jet or jets so as to strike the partially formed paper whilst
it is supported by the wire.
If desired the jets may be set so as to give a rough edge to the paper where they
cut it in imitation of the rough-deckle edge of hand-made påper,

page_text: tinuous Length on a Paper Making Machine into two or
more Narrow Lengths.
I, WILLIAM PATRICK BRUCE of Kinlieth in the County of Midlothian, Paper
Maker, 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 :-
When paper is manufactured in continuous lengths it is often required to slit
the continuous length of paper into two or more lengths of lesser width. Ordinarily
this is done in a cutting machine after the paper has passed from the machine on
which it has been made.
According to my invention I effect the slitting of the paper into two or more
widths whilst it is in process of being made, by the use of a fine jet or jets of
water directed against its surface as it comes in a moist condition along the paper
making machine. Where the fine jet strikes the paper it cuts a small hole through
it and consequently as the paper moves onwards the paper is slit lengthwise into
strips of any desired width."
Preferably I set the jet or jets so as to strike the partially formed paper whilst
it is supported by the wire.
If desired the jets may be set so as to give a rough edge to the paper where they
cut it in imitation of the rough-deckle edge of hand-made paper.
In carrying out my invention I prefer to form the water jets of soft metal pipes
about of an inch in diameter tapered at the outlet end to reduce the outlet
orifice to a size such as would be made by an ordinary darning needle. The pipes
are carried by a bar or frame fixed across the machine above the wire web which
carries the paper-the outlet ends of the pipes being brought close down to the
paper say to within about one inch more or less of its surface. Each pipe may be
carried by a slide capable of being moved along the bar or frame so that it may be
set in any required position-the slides may if desired be traversed to and fro by
right and left hand screws.
Each pipe or nozzle is connected by an india rubber tube to a water supply pipe'
supplying water at a pressure say of about 20 feet. A separate cock is provided
for regulating the supply of water to each jet.
The pressure of water and size of nozzle used may be varied if desired. .
I find it most convenient to apply the jet to the surface of the paper after it
has passed the vacuum boxes and before it reaches the couch roll. The jet may be
applied to the paper at varying angles according to the edge desired. If the paper
is to be cut clean a fine jet should be applied vertically with strong pressure of
water. If a rough deckle edge is desired the jet should be made to slope (either
with or against the run of the paper) and the pressure of water should be reduced
till the desired edge is obtained. The size and pressure of jet and angle must
be adjusted to suit the paper which is being made. These points can readily be
found by experiment.

page_text: It is not always easy to divide a thick paper by the water jet alone without
spoiling the edges by the fibre sparking over it-a stronger pressure of water being
required for dividing a thick paper.
In such cases especially when it is desired to make rough deckle edges I find it
convenient only partially to divide the paper by the jet of water and to complete
the division after it has passed the couch roll and before it comes to the drying
cylinders-this may be effected by causing the paper where it is partially divided
to be brought against a fixed cutter something in the form of a paper knife.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
Dividing or partially dividing continuous lengths of paper as they are being
formed on paper making machines into two or more narrower lengths by means of
jets of water directed against the surface substantially as described.
Dated this eth
L T