IMPROVEMENTS IN THE MANUFACTURE OF METAL ROLLERS FOR PRINTING CALICO AND FOR OTHER PURPOSES
Year: 1876

page_text: LETTERS PATENT to Henry Wilde, of Manchester, in the County of Lancaster,
Engineer, for the Invention of "IMPROVEMENTS IN THE MANUFACTURE OF
METAL ROLLERS FOR PRINTING CALICO AND FOR OTHER PURPOSES."
1070
PROVISIONAL SPECIFICATION left by the said Henry Wilde at the Office
of the Commissioners of Patents on the 12th September 1876.
•
HENRY WILDE, of Manchester, in the County of Lancaster, Engineer. "IMPROVE-
MENTS IN THE MANUFACTURE OF METAL ROLLERS FOR PRINTING CALICO AND FOR
OTHER PURPOSES."
Whereas Letters Patent were granted to me on the 28th day of December 1875,
Number 4515, for an improved method of depositing copper on iron rollers for
printing calico and for other purposes, by which the process was greatly accelerated
without detriment to the quality of the metal deposited.
The
Now my present improvements consist, firstly, in a method of securing a sufficient
amount of adhesion between the iron and deposited copper surfaces, to enable the
roller to withstand the various engraving and other operations without the
separation of the metals. For this purpose the iron roller before receiving a coating
of copper from a cyanide solution of copper, is heated to a temperature ranging
from 150° to 212° Fah. by plunging it into boiling water or by other means
said roller after receiving a thin deposit of copper from the cyanide solution is then
transferred to the bath containing a sulphate solution of copper where it receives
another and thicker coating of copper. This coating is subjected to considerable
pressure by the action of a burnishing roller of hardened steel for the double
purpose of forcing the deposited copper into closer contact with the iron, and
detecting any want of adhesion between the two metals. The burnished coppered
roller is then replaced in the bath of sulphate of copper solution, and subjected to
the action of the electric current until the desired thickness of copper deposit is
obtained. Before each of the depositing operations the surface of the roller is
throughly cleansed by scouring and washing in clean water as is well understood.
My Invention consists, secondly, in a method of constructing iron printing rollers
to be electro-coppered in such a manner as to prevent their splitting at the ends by

page_text: the conical wedge maundrils of the engraving and polishing machines, or when
split to prevent the fracture in the cast iron from extending to the engraved copper
surface of the roller. For this purpose the ends of the rollers are turned down
externally for a short distance, and hoops or rings of malleable iron or steel are
either shrunk on or forced over the ends, and the copper is deposited over the hoops
uniformly with the surface of the roller. Hoops of copper or brass may be forced
over the ends of cast-iron rollers to prevent the fracture of the cast iron from
extending to the electro deposited surface.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Wilde in the Great Seal Patent Office on the 9th March
1877.
EC
HENRY WILDE, of Manchester, in the County of Lancaster, Engineer. IMPROVE-
MENTS IN THE MANUFACTURE OF METAL ROLLERS FOR PRINTING CALICO AND FOR
OTHER PURPOSES.”
Whereas Letters Patent were granted to me on the 28th day of December 1875,
Number 4515, for an improved method of depositing copper on iron rollers for
printing calico and for other purposes by which the process was greatly accelerated
without detriment to the quality of the metal deposited.
Now my present improvements consist, firstly, in a method of securing a sufficient
amount of adhesion between the iron and deposited copper surfaces, to enable the
roller to withstand the various engraving and other operations without the
separation of the metals. For this purpose the iron roller before receiving a
coating of copper from a hot cyanide solution of copper is heated to a temperature
ranging from 150° to 212° Fahrenheit, by plunging it into boiling water or by
other means. The said roller after receiving a filin deposit of copper from the
cyanide solution is then transferred to the bath containing a sulphate solution of
copper where it receives one or more thin coatings of copper. These coatings are
subjected to considerable pressure by the action of a burnishing roller of hardened
steel for the double purpose of forcing the deposited copper into closer contact with
the iron, and detecting any want of adhesion between the two metals.
The
burnished coppered roller is then replaced in the bath of sulphate of copper solution
and subjected to the action of the electric current until the desired thickness of
copper deposit is obtained. Before each of tho depositing operations the surface of
the roller is thoroughly cleansed by scouring and washing in clean water as is well
understood.
My Invention consists, secondly, in a method of constructing iron printing rollers
to be electro-coppered in such a manner as to prevent their splitting at the ends
by the conical wedge mandrills of the engraving and polishing machines; or when
split to prevent the fracture in the cast iron from extending to the engraved copper
surface of the roller. For this purpose the ends of the rollers are turned down
externally for a short distance, and hoops or rings of malleable iron or steel are
either shrunk or forced over the ends, and the copper is deposited over the hoops
uniformly with the surface of the roller Hoops of copper or brass may be forced
over the ends of cast-iron rollers to prevent the fracture of the cast iron from
extending to the electro deposited surface.
Having thus stated the nature of my Invention and described the manner of
performing the same, I declare that I claim,-
First Heating iron rollers to prepare them for receiving a film deposit of of copper
from a cyanide solution.
Secondly Depositing one or more thin coatings of coppor from a sulphate 5
solution and burnishing the same before the final coating is deposited for the
purpose described.

page_text: Thirdly. The methods described, whereby the ends of cast-iron rollers coated
with copper are prevented from splitting.
In witness whereof, I, the said Henry Wilde, have hereto set my hand and
seal, this Eighth day of March, One thousand eight hundred and seventy-
seven.
HENRY WILDE. (L.S.)