IMPROVE- .MENTS IN PRINTING CYLINDERS OR ROLLERS
Year: 1864

page_text: LETTERS PATENT to Richard Archibald Brooman, of 166, Fleet Street, in
the City of London, Patent Agent, for the Invention of "IMPROVE-
.MENTS IN PRINTING CYLINDERS OR ROLLERS." -A communication from:
PROVISIONAL SPECIFICATION left by the said Richard Archibald Brooman
at the Office of the Commissioners of Patents, with his Petition, on the
29th September 1864..
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, Patent Agent, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN PRINTING CYLINDERS OR ROLLERS," to be as follows:-
This Invention consists in casting printing -cylinders of an alloy of copper
and zinc, and in covering the outer surface by the galvanic bath with a more
or less thick coat of copper. This alloy of copper and zinc is the only one to
which copper adheres perfectly by galvanic deposition. The respective pro-
portions of copper and zinc constituting this alloy are, by preference, 55 parts
of copper and 45 parts of zinc; but the proportion of copper may vary from
40 to 70 parts, and that of the zinc from 60 to 30 parts.
The rollers may be formed with a cylindrical or conical aperture through
their length, and for economising metal recesses may be made in the inner
surface of the rollers. After being cast the rollers are turned and then covered
with the coating of copper, after which they are mounted upon axes or
mandrils...

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Archibald Brooman in the Great Seal Patent Office
on the 29th March 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
ARCHIBALD BROOMAN, of 166,. Fleet Street, in the. City of London, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-ninth day of September, in the year of our Lord
One thousand eight hundred and sixty-four, in the twenty-eighth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Richard Archibald Brooman, Her, special licence that I, the said.
Richard Archibald Brooman, my executors, administrators, and assigns, or
such others as I, the said Richard Archibald Brooman, my executors, admi-
nistrators, and assigns, should at any time 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 "IMPROVEMENTS IN PRINTING CYLINDERS OR ROLLERS," (com-
municated to me from abroad by Edouard Hofer Grosjean, of Mulhouse,
France,) upon the condition (amongst others) that I, the said. Richard
Archibald Brooman, my executors or administrators, by an instrument in
writing under my, or their, or one of their 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.
NOW KNOW YE, that I, the said Richard Archibald Brooman, do
hereby déclare the nature of the said Invention, and in what manner the same
is to be performed to be particularly described and ascertained in and by the
following statement thereof, reference being had to the Drawings hereunto
annexed, that is to say:→
-This-Invention consists in casting printing cylinders of an alloy of copper
and zinc, and in covering the outer surface by the galvanic bath with a more
or less, thick coat of copper. This alloy of copper and zinc is the only one to
which copper adheres perfectly by galvanic deposition. The respective pro-
portions of copper and zinc constituting this alloy are, by preference 55 parts
of copper and 45 parts of zinc, but the proportion of copper may vary from 40
to 70 parts, and that of the zinc from 60 to 30 parts.

page_text: The rollers may be formed with a cylindrical or conical aperture through
their length; and for economising metal recesses may be made in the inner
surface of the rollers. After being cast the rollers are turned and then
covered with the coating of copper, after which they are mounted upon axes
or mandrils.
Figure 1 of the accompanying Drawings is a longitudinal section, and
Figure 2 a transverse section of a cylinder manufactured as before described.
The body A of the cylinder is cast of an alloy of copper and zinc; its outer
surface is then covered by the galvanic bath with a coat B of copper.
central aperture C is cylindrical, it may, however, be formed conical.
The
Figures 3 and 4 are sections of another cylinder formed in a similar manner
to that shown in Figures 1 and 2, except that the central aperture C is made
with recesses C for economising metal. If during the casting any honeycombs
are formed I fill them by means of the galvanic bath.
And having now described the nature of the said Invention, and in what
manner the same is to be performed, I declare that I claim, casting printing
cylinders or rollers of an alloy of copper and zinc, and covering the outer.
surface by the galvanic bath with a coat of copper, substantially in manner
herein-before described.
In witness whereof, I, the said Richard Archibald Brooman, have
hereunto set my hand and seal, this Twenty-ninth day of March, One
thousand eight hundred and sixty-five.
R. A. BROOMAN. (L.S.)