AN IMPROVEMENT IN THE MANUFACTURE OF PRINTING ROLLERS OR CYLINDERS
Year: 1855

page_text: LETTERS PATENT to Moses Poole, of Avenue Road, Regent's Park, for
the Invention of "AN IMPROVEMENT IN THE MANUFACTURE OF PRINTING
ROLLERS OR CYLINDERS."-A communication.
Sealed the 11th December 1855, and dated the 26th June 1855.
PROVISIONAL SPECIFICATION left by the said Moses Poole at the Office
of the Commissioners of Patents, with his Petition, on the 26th June
1855.
I, MOSES POOLE, of Avenue Road, Regent's Park, do hereby declare the
nature of the Invention for "AN IMPROVEMENT IN THE MANUFACTURE OF PRINTING
ROLLERS OR CYLINDERS" to be as follows:-
:
The object of this Invention is to obtain the requisite copper surfaces of
printing rollers or cylinders at less cost than heretofore. For this purpose,
iron rollers or cylinders of nearly the required diameters are employed, on to
the surfaces of which are deposited by electric currents coatings of copper.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Moses Poole in the Great Seal Patent Office on the 26th
December 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MOSES
POOLE, of Avenue Road, Regent's Park, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-sixth day of June, in the year of our Lord
One thousand eight,hundred and, fifty-five, in the nineteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Moses Poole, Her special licence that I, the said Moses Poole, my
executors, administrators, and assigns, or such others as .1, the said Moses
Poole, my executors,.administrators, 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 "AN IMPROVEMENT IN
THE MANUFACTURE OF PRINTING ROLLERS OR CYLINDERS," a communication, upon
. '+, 1
the condition (amongst others) that I, the said Moses Poole, by an instrument
in writing under my hand and seal, 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. Moses, Poole, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof (that is to say):-
The object of this Invention is to obtain the requisite copper surfaces of
printing rollers or cylinders at less cost than heretofore. For this purpose;
iron rollers or cylinders of nearly the-required' diameters are employed, on to
the surfaces of which are deposited by electric currents. coatings of copper.
Having thus stated the nature of the Invention, I will proceed more 'fully
to describe the manner of performing the same.
Until now the mode of manufacturing copper printing rollers or cylinders
intended for being afterwards engraved has been very expensive, in conse-
quence of the large quantity of metal that is required, and also the heavy cost
incurred for the casting, boring, and proper fitting of such cylinders, as shewn
in the longitudinal section, Figure 1; where a represents the axle firmly

page_text: adjusted into the copper cylinder b, b, of which each end a', a', of the aforesaid
axletree a are to form the exact centre. This Invention will obviate in the
most easy way the above-mentioned great inconveniences. On the cylinder c,
Figure 2, a mere coating of copper d, d, is shewn, but a greater thickness may
be obtained if desired. The coating d is obtained by the well-known galvano
or electro metallurgic process. To obtain a steady adhering coating of copper
d, d, on the periphery or surface c¹, c', c¹, c', of the cylinder c, Figure 2, and of
an equal and great closeness, and also of an equal thickness on its whole
extent, I proceed as follows:-In consequence of the thickness of the
coating d, d, Figure 2, being considerably less than the one of the cylinder b, b,
Figure 1, (in the proportion of about 1 to 10, which is what I prefer,) the
diameter of the cylinder is made as shown by c¹, c, c, c¹, Figure 2, so as to
procure to the roller when covered with the coating the same diameter as
shewn in Figure 1. The part c¹, c, c', c¹, Figure 2, is to be turned with the
greatest care, each of the ends c², c, forming the exact centre, and then a very
slight filing or roughing may be given on the surface of the part c¹, c', c¹, c',
which is to receive the coating. After having carefully scraped (or cleaned)
the said part c', c, c, c, and having covered the ends or gudgeons c², c², with
gutta percha or any other convenient material, the cylinder or axletree c is to
be placed in an horizontal position in the vat or metallic bath, to which appa-
ratus is arranged so as to procure a constant electric current, and also during
about a week a slow deposition of the metal (generally copper), which slow
electric action may afterwards be rendered more powerful, according to the
more or less hardness which may be required in the texture of the metal thus.
deposited on the surfaces c', c¹, c¹, c¹, as is well understood when obtaining electro
deposits for other purposes; and in order to produce an equal thickness of
the coating, the cylinder or axletree c is caused to turn slowly at intervals in
the bath by any suitable mechanical means.
In witness whereof, I, the said Moses Poole, have hereunto set my hand
and seal, this Twenty-first day of December, in the year of our Lord
One thousand eight hundred and fifty-five.
Witness,
B. GOBEY,
4, Old Square, Lincoln's Inn.
MOSES POOLE. (L.S.)