IMPROVEMENTS IN THE MANUFACTURE OR PRODUCTION OF STEREOTYPE PLATES
Year: 1873

page_text: LETTERS PATENT to William Macrone and William Mackenzie, both
of Glasgow, in the County of Lanark, North Britain, for the In-
vention of "IMPROVEMENTS IN THE MANUFACTURE OR PRODUCTION OF
STEREOTYPE PLATES."
PROVISIONAL SPECIFICATION left by the said William Macrone and
William Mackenzie at the Office of the Commissioners of Patents,
with their Petition, on the 11th July 1873.
We, WILLIAM MACRONE and WILLIAM MACKENZIE, both of Glasgow,
in the County of Lanark, North Britain, do hereby declare the nature of
the said Invention of "IMPROVEMENTS IN THE MANUFACTURE OR PRODUCTION OF
STEREOTYPE PLATES," to be as follows, that is to say :-
This Invention which relates to improvements in the manufacture or
production of stereotype plates, is a developement of the Invention for
which Letters Patent were granted to the said William Macrone and
William Mackenzie, No. 1916, A.D., 1872, and it consists in the employ-
ment of vulcanised india-rubber or caoutchouc, as the material of which
such plates are formed.

page_text: In constructing plates according to this Invention the india-rubber or
caoutchouc is poured whilst in a plastic state upon or into the moulds
constructed according to the process set forth in the Specification filed in
pursuance of the Letters Patent herein-before referred to, and whilst in or
adhering to the moulds is vulcanised in the ordinary manner.
One special use of this Invention is the construction of plates or dies
for hand stamps.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Macrone and William Mackenzie in the
Great Seal Patent Office on the 9th January 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, wc, WILLIAM
MACRONE and WILLIAM MACKENZIE, both of Glasgow, in the County
of Lanark, North Britain, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of July, in the year
of our Lord One thousand eight hundred and seventy-three, in the
37th year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said William Macrone and William
Mackenzie, Her special license that we, the said William Macrone
and William Mackenzie, our executors, administrators, and assigns,
or such others as we, the said William Macrone and William Mackenzie,
timć
our executors, administrators, or assigns, should at any agree
with, and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands and Isle of Man, an Invention for "IM-
PROVEMENTS IN THE MANUFACTURE OR PRODUCTION OF STEREOTYPE PLATES," upon
the condition (amongst others) that we, the said William Macrone and
William Mackenzie, by an instrument in writing under our hands
and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent

page_text: NOW KNOW YE, that we, the said William Macrone and William
Mackenzie, do hereby declare the nature of our said 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 :-
Our said Invention which relates to improvements in the manufacture
or production of stereotype plates, is a developement of the Invention for
which Letters Patent were granted to the said William Macrone and
William Mackenzie, No. 1916, A.D., 1872, and it consists in the employ-
ment of vulcanised india-rubber or caoutchouc as the material of which
such plates are formed.
In constructing plates according to this Invention, the india-rubber or
caoutchouc is pressed whilst in a plastic state upon or into the moulds
and apparatus constructed according to the Specification filed in pur-
suance of the Letters Patent herein-before referred to, and whilst in or
adhering to the moulds is vulcanised in the ordinary manner by heating
it between steam chests.
One special use of this Invention is the construction of plates or dies
for hand stamps.
Having now described and particularly ascertained the nature of our
said Invention, and in what manner the same is or may be used or
carried into practical effect, we would observe in conclusion that what
we consider to be novel and original, and therefore claim as the Inven-
tion secured to us by the herein-before in part recited Letters Patent
is, the construction of stereotype plates of vulcanised cautchouc, in the
manner and by the process herein-before described.
In witness whereof, I, the said William Macrone, on behalf of
myself and the said William Mackenzie, have hereunto set my
hand and seal, this Eighth day of January One thousand eight
hundred and seventy-four.