Improvements in Machines for Perforating Paper and the like.
Year: 1896

page_text: . Date of Application, 6th Aug., 1896
Complete Specification Left 13th Jan., 1897-Accepted, 6th Mar., 1897
:
PROVISIONAL SPECIFICATION.
Improvements in Machines for Perforating Paper and the like.
J, ARMIN KRAH of 78 Alte Jacob Strasse, Berlin, in the Empire of Germany,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention. relates to a device for perforating sheets of paper and similar
material which may afterward be collected in portfolios, letter files, or the like, its
characteristic feature being a rack and pinion arrangement by which the pins
effecting the perforations are operated.
Upon a base or board a steel cutting plate is fixed provided with boles which
allow the cutting pins to pass through. These cutting pins are located in suitable
bearing blocks and are capable of being moved up and down, the said bearing
blocks are fastened to the cutting plate by means of rivets, screws or the like.
The pins are provided with teeth, so as to form rack bars; these teeth engage a
toothed shaft or circular rack bar which traverses both bearing blocks.
or lever is attached to the said shaft between the blocks or hearings and a spiral
spring is so arranged as to constantly press the handle and shaft in a direction
opposite to that taken when the perforations are being made.
A handle
In order to perforate sheets of paper or the like, the sheets are placed into
the narrow space between the underside of the blocks or bearings, and the cutting
plate, and subsequently the handle or lever is pressed down rearwardly. By this
operation the pins are, through the medium of the rack-gear forced down and
caused to traverse the paper and the holes in the steel cutting plate. After the
paper has been thus perforated, the handle or lever is released and returns,
owing to the action of the spring, to its initial position, so that the device is again
ready for use.
In order that the places where the sheet or sheets of paper will be perforated,
may be conveniently adjusted, a slide of sheet metal is provided, which is bent up
vertically thus forming a stop. The sheet of paper or the like is placed against
this stop so that the holes may be formed as nearly as possible equidistant from the
centre of the side edge of the sheet or sheets to be perforated and so that the sheet
or sheets may be correctly placed in the portfolio, letter file or the like. The slide
is provided with graduations and appropriate denominations, for example, quarto,
octavo, folio and so on, to correspond with the current shapes of paper used, so
that the slide may be readily adjusted as required.
From
The paper rounds separated from the sheets by the perforating operation, fall
through the hole in the cutting plate into a space arranged beneath in the base or
board. This recess is closed by the aforesaid slide, so that the paper rounds or
particles can accumulate in the space and be prevented from falling out.
time to time the slide is entirely withdrawn and the collected particles removed.
The device may be modified in various ways without departing from the spirit
of the invention. Thus for instance the spiral spring may be replaced by one or
more springs of a different kind; moreover the toothed circular bar or shaft,
instead of being arranged in front of the cutting pins, may be placed behind them;
and the cutting plate and the blocks may be of cast or wrought iron; but an
essential feature is that the cutting pins are moved by rack gear.
1900
HASELTINE, LAKE & Co.,
1.
45 Southampton Buildings, London, W.C., Agents for the Applicant.

page_text: Improvements in Machines for Perforating Paper and the like.
I, ARMIN KRAH, of 78 Alte Jacob Strasse, Berlin, in the Empire of Germany,
Manufacturer, 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 a device for perforating sheets of paper and similar
material which may afterwards be collected in portfolios, letter files, or the like
its characteristic feature being a rack and pinion arrangement by which the pins or
punches effecting the perforations are operated.
This invention is illustrated in the accompanying drawing, in which
Figure 1 represents a cross sectional view thereof.
Figure 2 is a plan of the same.
Figure 3 is a cross sectional view of a portion of Figure 1, drawn to an enlarged
scale.
Upon.a base or board a a steel cutting plate b is fixed, provided with holes i
which allow the cutting pins or punches e (of which four are shown in the drawing)
to pass through. These cutting pins or punches are located in suitable bearing
blocks cand are capable of being moved up and down, the said bearing blocks are
fastened to the cutting plate b by means of rivets, screws or the like. The pins or
punches e are provided with teeth el so as to form rack bars; these teeth e¹ engage
the teeth a of a toothed shaft or circular rack bar d which traverses both
bearing blocks c c.
A handle or lever is attached to the said shaft d between the blocks or
bearings and a spiral spring y is so arranged as to constantly press the handle
and shaft in a direction opposite to that indicated. by the arrows in Figures 1
and 3.
In order to perforate sheets of paper or the like, the sheets are placed into the
narrow space between the underside of the blocks or bearings and the cutting
plate b and subsequently the handle or lever is pressed down rearwardly in the
direction indicated by the arrows in Figures 1 and 3. By this operation the pins e
are, through the medium of the rack-gear d'e, forced down and caused to traverse
the paper and the holes in the steel cutting plate b. After the sheet or sheets of
paper having been thus perforated, the handle or lever f is released and returns,
owing to the action of the springs g to its initial position, shown in Figure 1, so
that the device is again ready for use.
In order that the places where the sheet or sheets of paper are to be perforated,
may be conveniently adjusted, a slide h of sheet metal is provided which is bent up
vertically at thus forming a stop. The sheet or sheets of paper or the like is
placed against this stop so that the holes may be formed as nearly as possible
equidistant from the centre of the side edge of the sheet or sheets to be perforated
and so that the sheet or sheets may be correctly placed in the portfolio, letter file
or the like. The slide h is provided with graduations and appropriate denominations,
for example, quarto, octavo, folio, and so on, to correspond with the current shapes
of paper used, so that the slide may be readily adjusted as required.
The pieces of paper separated from the sheets by the perforating operation, fall
through the hole in the cutting plate into a space k arranged beneath the holes i
in the base or board a. This recess is closed by the aforesaid slide h so that the
pieces of paper can accumulate in the space k and be prevented from falling out.
From time to time the slide h is entirely withdrawn and the collected particles
removed.
The device may be modified in various ways without departing from the spirit
of the invention. Thus for instance the spiral spring 9 may be replaced by one or

page_text: more springs of a different kind; moreover the toothed circular bar or shaft d,
instead of being arranged in front of the cutting pins or punches as shown in the
drawing, may be placed behind thein; and the cutting plate band the blocks c may
be of cast or wrought iron; the handle or lever, and the plate or the whole
represented device may have a different external shape, and so on. An essential
feature however is that the cutting pins or punches e are moved by rack
gear d¹¹.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A device, for perforating paper, having the characteristic feature that its
cutting pins or punches e are forced downward vertically through the medium of a
rack and pinion gear (d' e¹) by turning a circular rod or shaft (d).
2. In punching devices of the kind described in the first claim, a slide (/) provided
with a head or projection ('), which acts at the same time for closing the hollow
space (k) below the knife or cutting blade (i).
Dated this 13th day of January 1897
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.