Improvements in Machines for Cutting Pasteboard and the like.
Year: 1890

page_text: Date of Application, 25th Sept., 1890-Accepted, 25th Oct., 1890
COMPLETE SPECIFICATION,
Improvements in Machines for Cutting Pasteboard and the like.
A communication from EMIL SALTZKORN, Consul, and LUDWIG NICOLAI,
Manufacturer, both of 21, Lobtauerstrasse, Dresden, in the German Empire.
I, ALFRED JULIUS BOULT of 323 High Holborn, in the County of Middlesex, M.I.M.E.,
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:
The hitherto known pasteboard shears in which co-operate two scissors-like blades
of which one is fixed to the table and the other to a lever-shaped beam, produce with
two or three layers of pasteboard of medium thickness but an uneven and imperfect
cut, which makes the pasteboard unfit for many purposes. The paper-cutting
machines now in use are unsuited for these purposes, as their operation necessitates a
number of movements of the hand which involve loss of time.
The subject of the present invention is a machine for cutting pasteboard and the
like to be used in the place of pasteboard shears and has the advantage of producing
a smooth and neat cut for several layers of stout pasteboard or the like.
This is obtained by means of one knife or blade with a sharp edge which slides
past the supporting plate or table and thereby receives a drawing motion, similar to
that which is given to the cutting knife by the hand.
For this purpose the knife handle or blade carrier a is mounted on a bolt or pivot b
carried in a bearing or block c which is capable of reciprocating in a frame or
guide d. The knife-handle or lever a extends beyond the pivot 6 and carries at the
projecting end a roller e which works in the curved slot f of a bracket g. A weight h
may be secured to the extension of the knife handle or lever or to an arm secured on
the pivot b.
On raising the knife-handle or lever a the block c is moved towards the table
through the guiding action of the cam slot f while a displacement in the opposite
direction is effected by pressing the knife-handle downwards.
A sliding motion is thereby given to the knife m in cutting, which on account of
the thin, sharp blade produces a smooth cut and also requires the application of but little
power. The cam finstead of being in the form of a slot may be solid in the form of
a bar and the lever a may be provided with an eye or other guide for working on it
and moreover it may be straight or of other shape than curved as herein before
described.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondents, and in what manner the
same is to be performed, I declare that what I claim is :-
1. In a pasteboard cutting machine the combination with a knife carrying lever
such as am the pivot 6 of which is carried in a sliding block of a cam such as f
substantially as described and illustrated in the accompanying drawings.
2. The combination and arrangement of parts constituting the complete cardboard
cutting machine substantially as described and illustrated in the accompanying
drawings.
Dated thin 15th day of Santambor 1890
W. P. THOMPSON & BOULT,
Agents for the Applicant.