A NEW OR IMPROVED DRY-COPYING PROCESS, AND APPARATUS AND MATERIALS FOR PRODUCING MULTIPLE COPIES OF WRITINGS, DRAWINGS, AND OTHER DELINEATIONS
Year: 1878

page_text: LETTERS PATENT to John Guy Wilson, of 71, Market Street, in the City of
Manchester, and 8, Quality Court, Chancery Lane, in the County of Middlesex,
Mechanical Engineer and Patent Agent, for the Invention of "A NEW OR
IMPROVED DRY-COPYING PROCESS, AND APPARATUS AND MATERIALS FOR
PRODUCING MULTIPLE COPIES OF WRITINGS, DRAWINGS, AND OTHER
DELINEATIONS." A communication from abroad by Vincenz Kwaysser and
Rudolf Husak, both of Semil, Bohemia, in the Empire of Austria.
PROVISIONAL SPECIFICATION left by the said John Guy Wilson at the
Office of the Commissioners of Patents on the 13th November 1878.
JOHN GUY WILSON, of 71, Market Street, in the City of Manchester, and
8, Quality Court, Chancery Lane, in the County of Middlesex, Mechanical
Engineer and Patent Agent. "A NEW OR IMPROVED DRY-COPYING PROCESS, AND
APPARATUS AND MATERIALS FOR PRODUCING MULTIPLE COPIES OF WRITINGS,
DRAWINGS, AND OTHER DELINEATIONS.' A communication from abroad by
Vincenz Kwaysser and Rudolf Husak, both of Semil, Bohemia, in the Empire of
Austria."
"
The object of this new and improved process is to produce fac simile copies of
writings, drawings, and other delineations upon paper or other suitable material
without damping the same, and without the use of a copying press or other
mechanical means of exercising pressure.
The apparatus consists of a shallow metallic tray or box, which is half filled with
a mass upon which the negative is to be produced. This mass consists of a solution
of 1 part gelatine, 4 parts glycerine, and 2 parts water, which when set presents a
smooth surface capable of receiving the color or ink from the original writing or
other document requiring to be copied.
The inks used in this new dry copying process consist,―
1. Violet (blue) Ink.
1 part violet methylated aniline dissolved in 7 parts of distilled water and 1 part

page_text: 2. Red Ink.
2 parts acetic rose aniline dissolved in 10 parts of distilled water and 1 part
alcohol.
If the original which is written or drawn with either of the before mentioned
inks on ordinary writing or drawing paper be now laid face downwards upon the
smooth surface of the mass hereinbefore mentioned, and is then softly pressed
thereupon either by the hand or by a thin layer of wood or paste-board, and after
the lapse of about a minute is then lifted off again, a reverse copy of the original
will be found in sharp and distinct lines upon the mass.
From a negative so produced 50 or more distinct copies may be taken on any sort
of paper, and this without damping or mechanical pressure, and which is accom-
plished as follows:-
The paper on which the copy is required must be laid carefully upon the negative
and pressed thereupon, and then slowly pulled away, when a copy will be obtained,
the process being capable of frequent repetition.
The negative may be easily removed from the mass by simply washing it off with
a sponge dipped in luke warm water, and the mass when dried by the application
of blotting paper and of a soft cotton rag is ready for another impression from any
original delineation requiring to be copied.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Guy Wilson in the Great Seal Patent Office on the 13th
May 1879.
JOHN GUY WILSON, of 71, Market Street, in the City of Manchester, and
8, Quality Court, Chancery Lane, in the County of Middlesex, Mechanical
Engineer and Patent Agent. "A NEW OR IMPROVED DRY-COPYING PROCESS, AND
APPARATUS AND MATERIALS FOR PRODUCING MULTIPLE COPIES OF WRITINGS,
DRAWINGS, AND OTHER DELINEATIONS." A communication from abroad by Vincenz
Kwaysser and Rudolf Husak, both of Semil, Bohemia, in the Empire of Austria.
The object of this new and improved process is to produce fac-simile copies of
writings, drawings, and other delineations upon paper or other suitable material
without damping the same, and without the use of a copying press or other
mechanical means of exercising pressure.
The apparatus consists of a shallow metallic tray or box, which is half filled with
a mass upon which the negative is to be produced. This mass consists of a solution
of 1 part gelatine, 4 parts glycerine, and 2 parts water, which when set presents a
smooth surface capable of receiving the color or ink from the original writing or
other document requiring to be copied.
The inks used in this new dry copying process consist :-
(1). Violet (blue) Ink.
1 part violet methylated aniline dissolved in 7 parts of distilled water and 1 part
alcohol.
(2). Red Ink.
2 parts acetic rose aniline dissolved in 10 parts of distilled water and 1 part
alcohol.
If the original which is written or drawn with either of the before mentioned
inks on ordinary writing or drawing paper be now laid face downwards upon the
smooth surface of the mass herein before mentioned, and is then softly pressed
thereupon either by the hand or by a thin layer of wood or paste-board, and after
the lapse of about a minute is then lifted off again, a reverse copy of the original
will be found in sharp and distinct lines upon the mass.
From a negative so produced 50 or more distinct copies may be taken on any sort
of paper, and this without damping or mechanical pressure, and which is accom-
plished as follows:-
The paper on which the copy is required must be laid carefully upon the nagative
and pressed thereupon and then slowly pulled away, when a copy will be obtained,
the process being capable of frequent repitition.
The negative may be easily removed from the mass by simply washing it off with
a sponge dipped in luke-warm water, and the mass when dried by the application
of blotting paper and a soft cotton rag is ready for another impression from any
original delineation requiring to be copied.
Having thus particularly described and ascertained the nature of the said
Invention communicated to me as aforesaid, together with the best methods for
carrying the same into practical effect, I wish it to be understood that I do not
confine myself to the precise quantities herein before mentioned, as they might be
varied more or less without departing from the Invention, but the quantities stated
give good results in actual work, and I therefore claim,-
1st. The improved "dry" copying process substantially as hereinbefore described.

page_text: 2nd. The use and application of the mass substantially as and for the purpose
described.
In witness whereof, I, the said John Guy Wilson, have hereunto set my
hand and seal, this Twelfth day of May, in the year of our Lord One
thousand eight hundred and seventy nine.
JOHN GUY (L.S.) WILSON.