Improvements in and relating to Rubber Numbering, Dating, and similar Stamps.
Year: 1889

page_text: Date of Application, 15th Nov.. 1889
Complete Specification Left, 15th Aug., 1890-Accepted, 4th Oct., 1890
PROVISIONAL SPECIFICATION.
Improvements in and relating to Rubber Numbering, Dating, and
similar Stamps.
HAROLD SAVAGE of the firm known as The London Rubber Printing Company
33, Cheapside London, & elsewhere Rubber Stamp Makers do hereby declare the
nature of this invention to be as follows :-
This invention relates to the making of wheels or rollers of metal, on to which the
printing characters, figures, letters, etc., of rubber, are moulded and vulcanized.
Stamps of this class have heretofore been made with engraved characters on the
wheels usually of metal.
This invention enables the printing characters to be made of rubber-& saves the
expense of engraving: The rubber characters will print casier than metal ones, and
are not liable to get battered with hard usage. The rubber characters being
vulcanized on to the metal wheel, there is no possibility of their coming off-as in the
case of a rubber band stuck on to the wheels.
The wheel or metal disc on which it is desired to put printing characters is made of
suitable size, the edge or face milled or otherwise roughed, so that the rubber face
shall adhere firmly.
The rubber-face is vulcanized on to the wheel in the usual way, in a mould or
matrix, which may be briefly described as follows:-
A metal plate having a circular recess cut, of sufficient depth to take the wheel.
The necessary characters may either be engraved in the circumference, or sunk types
may be arranged in the circumference to form a mould or matrix.
The metal wheel is placed on a stud in the centre, and rubber forced between the
wheel and outer circumference or matrix, and vulcanized under pressure, in the usual
way known to stamp makers.
The mould is made to open for the convenience of removing the rubber faced
wheel.
COMPLETE SPECIFICATION.
Improvements in and relating to Rubber Numbering, Dating, and
similar Stamps.
1, HAROLD SAVAGE, trading as The London Rubber Printing Company, of
33 Cheapside, E.C., in the County of London, Rubber Stamp 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:-
The object of this invention is the production of metal wheels or barrels having
printing characters of rubber moulded and vulcanized on to them.
The rubber character is not liable to get battered, and is much cheaper to produce
than the engraved metal character now used on wheels for numbering, dating, and
other like purposes.
The rubber character takes the ink better than metal, and requires less pressure to
print. The metal wheel on to which the printing face is vulcanized is not liable to
alter its shape, as in the case of solid rubber wheels or bands; further the wheels
being made of metal do not stick to each other but will rotate freely on their axis.
The accuracy of the metal wheel is combined with the printing qualities of the rubber
character.

page_text: And in order that my invention may be thoroughly understood, I now describe the
accompanying drawings thereof, reference being had to letters and figures marked
thereon.
Figure 1 is a plan of the top of the mould fixed in the bed.
Figure 2 is a side elevation.
Figure 3 is an elevation of half of the mould.
Figure 4 is a side view of the metal wheel with the rubber fixed thereto.
A simple mould for producing rubber faced wheels may be made as follows:-A
plate a of brass, steel or other metal of same thickness as the wheels (or otherwise),
are to be made, has a circular hold drilled or cut through it, the same diameter as it
is intended to make the wheels. The characters k may be of sunk type, or sunk with die
sinkers punches, or cut with a graver in their proper positions in the circumference, and
the plate cut as in Figure 1, to form semi-circles or parts of a circle for convenience
of removing the wheel from the mould; these plates a¹, a¹, or mould being keyed
together as indicated by dotted lines in Figure 1, and is secured on a smooth metal
plate having a stud g fixed in the centre and set screws c, c, to keep the metal wheel i
or core in position whilst vulcanizing. Another smooth metal plate a is placed on top
fixed by screws on each plate a¹, a', with a splayed opening d, and the mould is complete
ready to receive the rubber. A rubber faced wheel may be made as follows:-Take
a motal wheel i or core of a suitable size, and place it on the stud in the centre of
the mould already described, place sufficient rubber compound i¹ between the wheel i
or core and outer circumference d, put on the top plate of the mould over the pins e
and place the mould in a vulcanizing press, screw down the press and vulcanize in the
usual manner known to stamp makers. When vulcanized the wheel may be removed
and trimmed. This description will be readily understood by stamp makers.
Another method of making the mould or matrice is to set "sunk types," in the
circumference or bottom surface of the mould, to form the printing characters. These
types may be renewed as they become worn, at a small cost, and the same mould may
be used with different styles of type.
The metal wheel or core may be milled or roughed to cause the botter adhesion of
the rubber.
A mould may be made to take a number of wheels at the same time.
It will be understood that the shapes, materials, and proportions of the various parts
may be varied in many ways within the scope of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. A metal wheel or disc having printing characters of rubber vulcanized on to it,
substantially as herein described.
2. Moulds or matrices for producing rubber faced wheels or discs, substantially as
herein described and according to the accompanying drawings.
J. P. BAYLY,
18, Fulham Place, W., Agent for the Applicant.
C
J. P. BAYLY,
18, Fulham Place, W., Agent for the Applicant.