A Process for Marking Indelibly on Paper, Fabrics, and like Receptive Material.
Year: 1894

page_text: Date of Application, 6th Apr., 1894
Complete Specification Left, 2nd Oct., 1894-Accepted, 3rd Nov., 1894
IRUVIDIONAL
DI POLTIVATION.
[Communicated from abroad by CLAYTON BEADLE, at present care of George
D. Davis, of West Newton, Boston, Massachusetts, United States of
America.]
A Process for Marking Indelibly on Paper, Fabrics, and like
Receptive Material.
We, CHARLES FREDERICK CROSS, and EDWARD JOHN BEVAN, both of No. 4,
New Court, Carey Street, in the County of London, Analytical and Consulting
Chemists, do hereby declare the nature of this invention to be as follows:-
This invention relates to means of marking letters, figures, designs and the like
on receptive material such as paper or fabric. For this purpose, we moisten the
paper or other material with water or in some cases with a solution more or less
conductive of electricity.
We place the moistened material on a metal plate connected with one pole of
an electric battery or generator, and we connect to the other pole a metallic style
or stamp. On writing or marking with the style as with a pen or pencil, or lightly
pressing with the stamp, a current of electricity is made to pass through the
material, and an electrolytic action takes place by which portions of the metal of
the style or stamp or of the plate are dissolved according to the direction in which
the current is transmitted the solution permeating the material and taking the form
of the writing, marking or design.
The marks thus made are in many cases quite visible without farther treatment,
as for instance when silver is deposited in the material; in other cases, they may
be rendered more visible by treating the material with suitable reagents.
For instance a deposit of copper or iron compound may be developed by treating
the material with ferrocyanide of potassium.
Also the material may be moistened with the solution of a suitable reagent or the
pen or stylus may be dipped in such solution which will at one act on the metallic
substance electrically transmitted into the material, thus developing the design or
marking in various colours, according to the metals and reagents employed. In
many cases without solution of the metal at all, as when a platinum style or stamp
is employed, some change is effected in the material, such that when moistened
with water the writing, marking or design is rendered visible. By the process
above described linen or other fabrics can be indelibly marked, also paper may be
marked as described so that when, for documents of importance paper other than
that marked is employed, the fraud can be readily detected.
Dated this 6th day of April 1894.
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
A Process for Marking Indelibly on Paper, Fabrics, and like
Receptive Material.
We, CHARLES FREDERICK CROSS, and EDWARD JOHN BEVAN, both of No. 4
New Court, Carey Street, in the County of London, Analytical and Consulting
Chemists, do hereby declare the nature of this invention and in what manner the
Price &11

page_text: same is to be performed to be particularly described and ascertained in and by
the following statement :-
Our invention relates to means of marking letters, figures, designs and the like on
receptive material such as paper or fabric.
For this purpose, we moisten the paper or other material with water, or, in some
cases, with a solution more or less conductive of electricity.
We place the moistened material on a metal plate connected with one pole of an
electric battery or generator, and we connect to the other pole a metallic style or
stamp. On writing or marking with the style as with a pen or pencil, or lightly
pressing with the stamp, a current of electricity is made to pass through the
material, and an electrolytic action takes place by which portions of the metal of
the style or stamp or of the plate are dissolved, according to the direction in which
the current is transmitted, the solution permeating the material and taking the
form of the writing, marking or design.
The marks thus made are in many cases quite visible without farther treatment,
as for instance when silver is deposited in the material; in other cases they may
be developed or rendered more visible by treating the material with suitable
reagents.
For instance, a deposit of copper or iron compound may be developed by treating
the material with ferrocyanide of potassium.
Also the material may be moistened with the solution of a suitable reagent or
the pen or style may be dipped in such solution which will at once act on the
metallic substance electrically transmitted into the material, thus developing the
design or marking in various colours, according to the metals and reagents
employed. In many cases without solution of the metal at all, as when a platinum
style or stamp is employed, some change is effected in the receptive material,
such that, when moistened with water, the writing, marking or design is rendered
visible.
By the process above described, linen or other fabrics can be indelibly marked,
also paper may be marked as described so that when, for documents of
importance, paper other than that marked is employed, the fraud can be readily
detected.
Paper or fabric may be marked in the way described above by passing it in a
moist condition between a pair of rollers connected each to one terminal of the
source of electricity.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what
we claim is :-
The herein described process for indelibly marking on paper, fabric or other
suitable receptive material by placing the material moistened on a metal surface
connected to one pole of an electric battery or other generator and marking it by
a metal style, stamp or its equivalent connected to the other pole.
Dated this 1st day of October 1894
ABEL & IMRAY,
Agents for the Applicants.