IMPROVEMENTS IN MACHINERY OR APPARATUS FOR CUTTING PAPER
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by William Caspar Kritch and John
Garland at the Office of the Commissioners of Patents on the 22nd November
1882.
WILLIAM CASPAR KRITCH and JOHN GARLAND, both of Leeds in the County of
York, Printers' Engineers, * IMPROVEMENTS IN MACHINERY OR APPARATUS FOR
CUTTING PAPER
»
This invention relates to that kind of paper cutting machine in which a knife
blade is caused to descend both diagonally and horizontally upon the paper to be
cut, and has for its object improved methods of actuating the said knife blade, of
verifying the position of the paper previously to being cut, and of actuating a
presser beam for holding the paper in such position during the operation of cutting.
In carrying out our said improvements, we construct a suitable framework for
carrying a horizontal table of the usual form upon which are placed the several
thicknesses of paper intended to be cut.-The upper part of said framework is
suitably formed for guiding the knife holder and knife, and also a clamping or
presser beam for holding the paper whilst being cut, this presser beam we actuate
automatically both up and down, by means of studs and rollers or other suitable
projections on the knife holder taking into diagonal slots therein.-The downward
movement of the said knife holder and knife, at the commencement of its stroke is
about perpendicular to the surface of the table upon which the paper to be cut is
placed, until by the action of the above named studs and rollers or other projections,
the presser beam is caused to descend so far as to hold the pile of paper to be cut,
firmly between itself and the table of the machine, after which the motion of the
knife holder and knife assume a diagonal in combination with its downward
movement, which continues to the end of its stroke, and in the ascent thereof
release and lift the pressure beam to its upper position, which is determined by set
screws or other convenient stop or stops provided for the purpose in the principal
framework. The said presser beam having reached the abovenamed position, the
remaining part of the upward motion of the knife and its holder is in a diagonal
direction.
The movement of the pile of paper upon the table is effected in the usual way
by means of a screw and projecting fence at the rear of such pile, and in order to
ascertain that the paper is in the desired position for being operated upon, we use

page_text: in conjunction with the presser beam a supplementary presser bar, which also acts
as an indicator or verifier of the position of the paper, and which is brought down
upon the paper by suitably arranged mechanism actuated by hand
In order to actuate the knife holder and knife we arrange in the lower part of
the principal framework, suitable gearing for the purpose, the main wheel of which
is provided with a crank stud or eccentric upon which is mounted a crosshead,
extending horizontally in both directions to the outside of the principal frame-
work. To each end of said crosshead, a link or connecting rod is attached, both
of which pass upwards and are jointed, one to each end of the aforesaid knife
holder.
The driving shaft of the said gearing is driven from any convenient motor by
strap or otherwise, and at the termination of each upward stroke of the knife
holder, the same is automatically disengaged or arrested, and remains in that
position until another adjustment of the paper has taken place, when the operator
by means of a treadle provided for the purpose, may re-start the machine for
another cut.