AN IM- PROVEMENT OR IMPROVEMENTS IN THE MANUFACTURE OF HOLLOW CYLINDERS OF COPPER OR ALLOYS OF COPPER, WHICH SAID CYLINDERS MAY BE USED FOR ROLLERS FOR PRINTING FABRICS, AND FOR SUCH OTHER PURPOSES AS THE SAME ARE OR MAY BE APPLICABLE TO."
Year: 1860

page_text: LETTERS PATENT to Alfred Sohier Bolton, of Oakamoor, in the County of
Stafford, Manufacturer, and Francis Seddon Bolton, of Birmingham,
in the County of Warwick, Manufacturer, for the Invention of "AN IM-
PROVEMENT OR IMPROVEMENTS IN THE MANUFACTURE OF HOLLOW CYLINDERS OF
COPPER OR ALLOYS OF COPPER, WHICH SAID CYLINDERS MAY BE USED FOR
ROLLERS FOR PRINTING FABRICS, AND FOR SUCH OTHER PURPOSES AS THE SAME
ARE OR MAY BE APPLICABLE TO.""
Sealed the 16th March 1860, and dated the 11th January 1860.
(Void by reason of the Patentee having neglected to file a Specification.
in pursuance of the conditions of the Letters Patent.)
PROVISIONAL SPECIFICATION left by the said Alfred Sohier Bolton and
Francis Seddon Bolton at the Office of the Commissioners of Patents,
with their Petition, on the 11th January 1860.
We, ALFRED SOBIER BOLTON, of Oakamoor, in the County of Stafford,
Manufacturer, and FRANCIS SEDDON BOLTON, of Birmingham, in the County of
Warwick, Manufacturer, do hereby declare the nature of the said Invention
for "AN IMPROVEMENT OR IMPROVEMENTS IN THE MANUFACTURE OF HOLLOW
CYLINDERS OF COPPER OR ALLOYS OF COPPER, WHICH SAID CYLINDERS MAY BE USED
FOR ROLLERS FOR PRINTING FABRICS, AND FOR SUCH OTHER PURPOSES AS THE SAME
ARE OR MAY BE APPLICABLE TO," to be as follows:-

page_text: Our Invention consists in the method herein-after explained of manufacturing
such hollow cylinders of copper or alloys of copper as are thin in substance
compared with their diameter, such as the large hollow cylinders used for
printing large patterns on fabrics.
Our Invention is also applicable to the manufacture of such printing rollers
as are small in diameter and thin in substance, such rollers having a body or
internal support of iron or other hard metal or material.
We carry our Invention into effect in the following manner :-We take a
hollow cylinder of copper or alloy of copper, the said cylinder being much
smaller in diameter and thicker in substance than it is intended the finished
cylinder shall be. After having turned the exterior and bored the interior of
the said cylinder, we heat it to redness, and while hot, haminer or press it, so
as to flatten it. When nearly flattened, we coat the interior with a layer of
sand or other powdered solid not affected by heat, or with a mixture of such
substance with water or other liquid; we then complete the flattening process.
Having again heated it, we pass it between a pair of plain or flat rolls.. The
flattened cylinder is passed between the rolls according to the method of rolling
called "cross rolling," that is, the axis of the flattened cylinder is parallel with
the axes of the rolls. The rolling process is repeated until the width of the
flattened cylinder is such that when opened again into a cylindrical form it
will have the required diameter. After the completion of the rolling process
the cylinder is opened, and the fins or burrs formed at the places where
the metal was doubled are removed. The cylinder may then be finished in tho
usual or any desired manner.
We sometimes place a sheet of copper or other metal or alloy in the flattened
cylinder before rolling it, so as to prevent the sides coming to closely into
contact during rolling, and also to prevent too sharp a bend at the edges. Tho
last-named object may also be effected by placing rods or bars of copper having
rounded edges at the bends of the flattened cylinder.