Improvements in Ink Erasers.
Year: 1892

page_text: Date of Application, 11th Apr., 1892-Accepted, 14th May, 1892
COMPLETE SPECIFICATION.
Improvements in Ink Erasers.
A communication from GEORGE WASHINGTON PROUTY, of Boston, State of
Massachusetts, United States of America, Manufacturer.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Member of the Institution of Mechanical Engineers, 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 ink erasers, has for its object the production of an
eraser especially adapted for use by type-writers, and consists in certain novel
features of construction, arrangement and combination of parts which will be
readily understood by reference to the description of the drawings and to the
claims hereinafter given and in which the invention is clearly pointed out.
Fig. 1 of the drawings is an elevation of a portion of a type-writer impression
roll with the hand of the operator holding the improved eraser in the preferred
position for practical use.
Fig. 2 is a sectional elevation of the eraser with a plurality of cutters
thereon.
Fig. 3 is a transverse section on line . . on Fig. 2, and
Fig. 4 is an elevation of a detached cutter.
In the drawings A is the stock or handle of the eraser having one or more disc-
like cutters a secured to its smaller end by the clamping screw b set in the end of
said stock in axial line therewith as shown in Fig. 3.
The end of said stock to which the eraser disc a is secured is made tapering and
a portion A thereof at the opposite end is in the form of a flat blade to serve as a
paper cutter and folder, and can be used as a burnisher for rubbing down the
surface of the paper after the erasing has been done.
The cutter discs a have continuous circular cutting edges as shown in Fig. 4,
and said cutter by virtue of its small diameter is adapted to erase a letter or
line in close proximity to another letter or line without injury to said other line or
letter.
The cutter discs are made flat on one side while the cutting edge is formed by
bevelling the other side as shown in Figs. 3, 4 and 5.
This eraser is especially adapted for use in erasing letters in type-written matter
while upon the impression cylinder owing to the small part of the cutting edge
which can be brought into contact with the paper at the same time, and the fact
that the cutting edge is at right angles to the stock of the eraser so that the
operator, while holding the stock between his or her thumb and the fore and
middle fingers, can present the eraser to the paper with the stock at right angles or
nearly so to the line of written matter as shown in Fig. 1 in which B is the
impression cylinder, C the paper wrapped around said cylinder, and D is one of the
clip-like springs for holding the paper to the cylinder.
When the cutters become dulled by use so as to be unserviceable they can be
readily sharpened by grinding their flat sides. This can be accomplished in an
expensive way by simply placing said cutter upon a flat stone with its flat side in
contact therewith placing the finger upon said cutter and moving said cutter back
and forth until it is sufficiently sharp.
Each stock is furnished with a plurality of cutter discs which may be used
singly or collectively.
In using the improved eraser when one section of the cutting edge becomes
dulled, by slightly rotating the stock about its axis another and sharper section of
the edge is brought into position for use, and when the whole edge becomes dulled,

page_text: the disc may be removed and a sharp one substituted therefor, the dulled one being
placed in any suitable receptacle until such time as it is convenient to sharpen it.
The bevelled side of the cutter disc may be used as a burnisher by holding it in
such a position that its edge shall not touch the paper or by moving it only in one
direction in contact with the paper.
Having now particularly described and ascertained the nature of the said inven-
tion, as communicated to me by my foreign correspondent, and in what manner
the same is to be performed, I declare that what I claim is,-
1. The combination in an ink eraser of a handle or stock and a circular disc
cutter secured to one end thereof, and adapted to have any portion of its circular
edge brought into position for use.
2. An ink eraser consisting of a stock or handle and a disc like cutting blade
having its cutting edge at right angles to the axis of said stock.
3. An ink eraser consisting of a handle or stock and a disc-like cutter secured to
one end of said stock with its cutting edge at right angles to the axis of said stock,
said disc having one side flat and the other side bevelled at its outer edge to form
a cutting edge.
4. The combination of the stock A having formed on one end a paper folding
and cutting blade and a disc-like bevelled edged cutter secured to the opposite end
of said stock with its flat side at right angles to the axis of said stock.
Dated this 11th day of April 1892.
ALFRED J. BOULT,
Chartered Patent Agent.