An Improved. Process for Making Moulds, especially applicable to Moulds or Matrices for Making Printing Surfaces.
Year: 1892

page_text: Date of Application, 7th Jan., 1892
Complete Specification Left, 7th Oct., 1892-Accepted, 12th Nov., 1892
PROVISIONAL SPECIFICATION.
An Improved. Process for Making Moulds, especially applicable to
Moulds or Matrices for Making Printing Surfaces.
A. communication to me from LUCIEN MARC, of 7, Rue de Rivoli, Paris, in.
the Republic of France.
I, EDMUND EDWARDS, of the firm of Edwards and Co., Patent Agents and
Engineers, of 35 Southampton Buildings, Chancery Lane, in the County, of
Middlesex, do hereby declare the nature of this invention to be as follows:--
This invention has for its object an improved process for making moulds, and it
is more especially applicable to making moulds or matrices used in the manufacture
of printing blocks or surfaces. For this purpose the whole surface of the object to
be moulded, (for example, an engraved wood block, in the case of the manufacture
of a printing block or surface,) is covered with a thin sheet of lead, tin, or other
metal, or alloy of metals, or other suitable substance; for the purpose of separating
the said surface from the plastic material which is to form the mould..
By the aid of a press, or burnisher, or other equivalent means, the sheet of metal
is pressed upon the object to be moulded, so as to perfectly fill all the raised and
depressed lines of the latter. The object thus protected. is then covered with a
plastic substance such as plaster, mastic, or the like, without risk of injury from
direct contact of the object with such substance.
For the manufacture of typographic printing blocks or "clichés," the use in the
way described of a sheet of lead or tin allows wood blocks to be moulded, which
would be injured by direct contact with damp or greasy plaster or mastic. The
mould made as described may in turn be employed for making printing surfaces of
celluloid or other analogous substances, india rubber, and other substances the use
of which has not heretofore been practicable for want of a suitable process of
making the moulds.
dow of Tanuary 1049
EDWARDS & Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Process for Making Moulds, especially applicable to
Moulds or Matrices for Making Printing Surfaces.
A communication to me from LUCIEN MARC, of 7, Rue de Rivoli, Paris, in
the Republic of France.
I, EDMUND EDWARDS, of the firm of Edwards and Co., Patent Agents and
Engineers, of 35, Southampton Buildings, Chancery Lane, in the County of
Middlesex, 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, that is to say :-
This invention has for its object an improved process for making moulds, and it is
more especially applicable to making moulds or matrices used in the manufacture of
printing blocks or surfaces. For this purpose the whole surface of the object to be
moulded, (for example, an engraved wood block, in the case of the manufacture of
a printing block or surface) is covered with a thin sheet of lead, tin, or other
metal, or alloy of metals, or other suitable substance, for the purpose of separating
the said surface from the plastic material which is to form the mould.
By the aid of a press, or burnisher, or other equivalent means, the sheet of metal
077

page_text: is pressed upon the object to be moulded, so as to perfectly fill all the raised and
depressed lines of the latter.
The object thus protected is then covered with a plastic substance such as
plaster, mastic, or the like, without risk of injury from direct contact of the object
with such substance.
For the manufacture of typographic printing blocks or "cliches," the use in the
way described of a sheet of lead or tin allows wood blocks to be moulded, which
would be injured by direct contact with damp or greasy plaster or mastic. The
mould made as described may in turn be employed for making printing surfaces of
celluloid or other analogous substances, india rubber, and other substances the use
of which has not heretofore been practicable for want of a suitable process of
making the moulds.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The process for making moulds consisting of interposing between the object
from which the mould is to be taken and the plastic material which is to form the
mould, a protecting sheet of a material capable itself of receiving the impression
from the object, and protecting such object from contact with the plastic material
such as plaster, substantially as described.
2. The matrices or moulds obtained in the manner described, from which printing
surfaces or "cliches" of celluloid, india rubber, and other analogous substances, can
be prepared, substantially as described.
Dated this 7th day of October 1899
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicant.