An Improved Method of Making Rubber Stamps.
Year: 1893

page_text: Date of Application, 10th Jan., 1893-Accepted, 25th Feb., 1893
COMPLETE SPECIFICATION.
An Improved Method of Making Rubber Stamps.
I WILLIAM FRANK BARNES of Orlando in the County of Orange and State of
Florida, United States of America Printer 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 :-
My invention relates to an improvement in the method of making rubber stamps
from type and casts and it consists essentially of setting up the desired form of type
provided on one end with raised letters or characters and on the opposite end with
letters or characters in intaglio, then obtaining a proof from the end containing the
raised letters or characters and finally placing the rubber on the matrix or sunken
letters and vulcanizing to produce the necessary rubber cast.
In the accompanying drawings
Fig. 1 represents a face view of a type embodying my invention with a letter in
relief
upon one end.
Fig. 2 is a face view of the opposite end of the type with the same letter in
intaglio and
Fig. 3 is a longitudinal view or elevation of said type having its lower end partly
broken away or in section to better expose the letter or character in intaglio and
the outline of which, sunken into the metal of the type is of the same depth as the
like letter or character in relief upon the opposite end is high or raised.
A represents a type constructed of the usual or any suitable metal or alloy used
in the printing art, or it may be made of any suitable material, but for all practical
purposes it is made as ordinary printing type is made with any desired letter or
character b in relief upon one end, while its opposite end is provided with a counter-
part of the same letter or character, which latter is sunk into the metal or
intaglio in form.
The type is provided on one of its sides with the usual nick or groove c to set
the letters in a form of type all one way, and both the letters or characters in relief
and those in intaglio on the type occupy a like relation as regards their bottoms to
this nick or groove. The raised letter or character on one end of the type, enables
the compositor to set up in the usual manner, take proof and correct errors, and is
used exclusively for setting up, taking proof and distributing, while the sunken or
intaglio letter or character upon the opposite end of the type is to form a matrix
by means of which the required cast is obtained. To use this improved type, or
matrix type as it may be termed, for making rubber stamps or casts, for instance,
by way of illustration, the desired work is first set up in the usual manner of setting
type to print, that is, with the faces of the type having the raised letters or
characters on them exposed to produce the required impression, take proof and
correct errors, the type in any number of pieces being locked up in a chace as
usual. The chace with its contents is then turned over which presents the form
in a matric character, the same type then having their matrix ends, that is, the
ends with the sunken letters or characters in them, exact counterparts of the raised
letters or characters exposed. The rubber is then laid on the matrix form and
vulcanized to produce the necessary rubber cast.
By this invention, the type being a matrix itself, every letter or character in
which is perfect, there is no possibility of a cast being imperfectly made. No
oil is used on the type, and consequently they are not soiled and do not stick
together.
It also saves the expense of plaster of Paris and the time and work usually
consumed in making a plaster matrix.
In devices heretofore used the same type have been used both for printing the

page_text: necessary proof and also for making the matrix, which fact necessitates the cleaning
of the type, but with my device the cleaning of type is not necessary as the raised
end of the type is only used for obtaining a proof of the work to be cast, and if the
proof be correct, the form is reversed thus exposing the opposite ends of the type,
in which position the necessary cast is obtained in the manner heretofore
described.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
'claim is.
A method of making rubber stamps hereindescribed consisting essentially of
setting up the desired form of type provided on one end with raised letters or
characters and on the opposite end with letters or characters in intaglio, then
obtaining a proof from the end containing the raised letters or characters and
finally placing the rubber on the matrix or sunken letters and vulcanizing to
produce the necessary rubber cast.
Dated this 10th day of January 1893.
R. HADDAN,
Herbert Haddan & Co.,
18, Buckingham Street, Strand, London, Agent for Applicant.