Improvements in or relating to Transfer Sheets and Composition therefor.
Year: 1899

page_text: Date of Application, 21st Mar., 1899
Complete Specification Left, 21st Dec., 1899-Accepted, 17th Feb., 1900
Improvements in or relating to Transfer Sheets and Composition
therefor.
A communication from Dr. WILLIAM P. DUNLANY, Physician, residing at 73, Fourth
Avenue, Cleveland, Cuyahoga County, Ohio, United States of America.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of London,
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows:-
The ultimate object of the invention is to provide a transfer sheet adapted for the
transference of sketches or writing to a metal sheet by pressure. The transfer
sheet is particularly adaptable for use in connection with facsimile telegraphs where an
image is transmitted by a stylus which traces over a metallic sheet having on it an
insulating picture. In order that a stylus of the requisite fineness shall not break
through the insulation the latter must be of considerable hardness, at the same time
it must not be brittle; and it must have sufficient permanence not to be obliterated
or dimmed by handling, and preferably permanence enough to allow many trans-
missions of it. The material must be accurately insulating and it should have color
enough so that the transmitting operator may see that the message or picture is
correct. If the material is also able to withstand the corroding action of etching
acids it may be used in receiving a facsimile picture,-the sheet of metal being put
into a bath and etched in an ordinary manner.
The invention purposes providing a transfer paper which by the pressure of the
pencil, stylus or hammer on its back side shall transfer to a sheet of metal an
impression which shall ultimately have the characteristics above set out.
It has been found that the most satisfactory method of securing permanence and
hardness of the picture is to bake the sheet after the picture has been transferred,
and the transfer material must therefore be of such quality that it will not run with
the heat nor crack, and will afterward "set" or harden.
The invention includes both the transfer sheet and the composition of matter
therefor.
It has been discovered that all the desirable qualities heretofore specified are
obtained to a high degree from a paper having a coating of the following substances
in the following proportions:

page_text: omitted and the printers' ink relied on for furnishing the color. The rosin gives a
set to the material after it has been heated, and furnishes an excellent insulation.
The wax furnishes body, the tallow prevents cracking, and the turpentine and
printers' ink give the material the desired plasticity for transferring. The proportions
may be varied quite widely.
Improvements in or relating to Transfer Sheets and Composition
therefor.
A communication from WILLIAM P. DUNLANY, of 73, Fourth Avenue, Cleveland,
Cuyahoga County, Ohio, United States of America, Physician.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of London,
Chartered Patent Agent, 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 ultimate object of the invention is to provide a transfer sheet adapted for the
tranference of sketches or writing to a metal sheet by pressure. The transfer sheet
is particularly adaptable for use in connection with facsimile telegraphs where an
image is transmitted by a stylus which traces over a metallic sheet having on it an
insulating picture. In order that a stylus of the requisite fineness shall not break
through the insulation the litter must be of considerable hardness, at the same time
it must not be brittle; and it must have sufficient permanence not to be obliterated
or dimmed by handling, and preferably permanence enough to allow many trans-
missions of it. The material must be accurately insulating and it should have color
enough so that the transmitting operator may see that the message or picture is
correct. If the material is also able to withstand the corroding action of etching acids
it may be used in receiving a facsimile picture,-the sheet of metal being put into a
bath and etched in an ordinary manner.
The invention purposes providing a transfer paper which by the pressure of the
pencil, stylus or hammer on its back side shall transfer to a sheet of metal while cold
an impression which shall ultimately have the characteristics above set out.
It has been found that the most satisfactory method of securing permanence and
hardness of the picture is to bake the sheet after the picture has been transferred, and
the transfer material must therefore be of such quality that it will not run with the
heat nor crack, and will afterward "set" or harden.
The invention includes both the transfer sheet and the composition of matter
therefor.
It has been discovered that all the desirable qualities heretofore specified are
obtained to a high degree from a paper having a coating of the following substances
in the following proportions:
ד

page_text: The dragons' blood is a gum coloring matter, and it may be replaced by increasing
the amount of rosin and adding a pigment, or if desired the pigment may be omitted
and the printers' ink relied on for furnishing the color. The rosin gives a set to the
material after it has been heated, and furnishes an excellent insulation.
The wax
furnishes body, the tallow prevents cracking, and the turpentine and printers' ink
give the material the desired plasticity for transferring. The proportions may be
varied quite widely.
Having now particularly described and ascertained the nature of the said invention,
and in what manner the saine is to be performed, as communicated to me by my
foreign correspondent, I declare that what I claim is :-
1. The transfer sheet substantially as herein described.
2. A sheet combined with a coating adapted to be transferred to a metallic sheet
while cold by pressure and adapted to harden after such metallic sheet is heated.
3. A sheet of paper covered with a coating of cerated and resinous matter and adapted
to be transferred by pressure to a metallic sheet.
4. A transfer sheet coated with a composition including wax, tallow and pulverized
resinous matter.
5. A composition of matter for a transfer sheet, consisting of wax, tallow, rosin and
printers' ink.
6. A composition of matter for a transfer sheet consisting of wax, tallow, rosin and
oil of turpentine.
7. A composition of matter for a transfer sheet consisting of wax, tallow, resinous
matter, oil of turpentine and coloring matter.
8. A transfer sheet having a coating of printers' ink, wax, tallow, rosin, oil of
turpentine, and dragons' blood or its equivalent, in about the proportions specified.
9. A sheet having a coating of transfer material adapted to be transferred by
pressure to a cold metallic sheet, said coating being of a waxy character and thus
adapted to protect the metallic sheet from the action of the acids employed in
etching.
Dated this 21st day of December 1899.
BOULT, WADE & KILBURN,
Agents for the Applicant.