IMPROVEMENTS IN ETCHING ON ROLLERS
Year: 1883

page_text: LETTERS PATENT to Charlos James Appleton of Lower Broughton Salford
and David Appleton of Sackville Street in the City of Manchester both in the
County of Lancaster for an Invention of IMPROVEMENTS IN ETCHING ON
ROLLERS"
PROVISIONAL SPECIFICATION left by the said Charles James Appleton
and David Appleton at the Office of the Commissioners of Patents on the
12th January 1883.
CHARLES JAMES APPLETON of Lower Broughton, Salford and DAVID APPLETON
of Sackville Street in the City of Manchester, both in the County of Lancaster,
"IMPROVEMENTS IN ETCHING ON BOLLERS "
Our Invention relates principally to the rollers employed in the printing of
cotton, woolen and other fabrics. In the ordinary etching processes the rollers aro
coated with a varnish or acid resistant and the pattern having been traced upon
this coating so as to expose the metal the roller is placed in an acid bath. The
effect of the acid is to produce irregular grooves in the metal owing to the irregular
action of the acid which acts upon the metal at the sides of the lines as well as at
the bottom so that the lines are usually undercut and not of the same sectional
form as engraved lines. To remedy these defects is the object of our Invention
and this we accomplish by effecting the etching with the aid of electric or magnetic
currents. We arrange for the roller to be an anode or a positive element connected
with the anode in a battery combination the electric or magnetic current passing
into the roller and from the roller to a negative element or to two or more such
elements which is or are connected with the cathode pole. The solution employed
may be a solution of sulphate of copper or an acid solution or any other suitable
solution or liquid. We prefer to revolve or to oscillate the roller during the
process. We may arrange a roller between two negative elements or a negative
element between two rollers or we may arrange the roller within a cylinder which
is the negative element. The effect of our improved process is to produce lines
which are more like ordinary engraved or cut lines than can be obtained' with
ordinary etching. Our Invention is also applicable to be used in the preparation of
rollers for embossing and for other uses.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles James Appleton & David Apploton in the Great Seal Patent
Office on the 11th July 1883.
CHARLES JAMES APPLETON of Lower Broughton, Salford, and, DAVID APPLETON
of Sackville Street, in the City of Manchester, both in the County of Lancaster
"IMPROVEMENTS IN ETCHING ON ROLLERS"
Our Invention relates principally to the rollers employed in the printing of
cotton, woolen and other fabrics. In the ordinary etching processes the rollers are
conted with a varnish or acid resistant and the pattern having been traced upon
the coating so as to expose the metal the roller is placed in an acid bath. The
effect of the acid is to produce irregular grooves in the metal owing to the irregular
action of the acid which acts upon the metal at the sides of the lines as well as at
the bottom so that the lines are usually undercut and not of the same sectional
form as engraved lines. To remedy these defects is the object of our invention
and this we accomplish by effecting the etching with the aid of electric or magnetic
currents. We arrange for the roller to be an anode or a positive element connected
with the anode in a battery combination the electric or magnetic current passing
into the roller, and from the roller to a negative element or to two or more such
elements which is or are connected with the cathode pole. The solution employed
may be a solution of sulphate of copper or an acid solution or any other suitable
solution or liquid. We prefer to revolve or oscillate the roller during the process.
We may arrange a roller between two negative cloments or a negative clement
between two rollers or we may arrange the roller within a cylinder which is the
negative element. The effect of our improved process is to produce lines which are
more like ordinary engraved or cut lines than can be obtained with ordinary
etching. Our invention is also applicable to be used in the preparation of rollers
for embossing and for other uses.
}
Having now fully set forth and indicated the nature of our said invention and
the manner in which we carry the same into practical effect we would have it to
be understood that we claim the method of etching motal rollers by the aid of
electric or magnetic currents substantially as hereinbefore set forth.
:.
In witness whereof I the said Charles James Appleton for myself and on
behalf of the said David Appleton have hereunto set my hand and seal
this tenth day of July in the year of our Lord one thousand eight hundred
Signed, sealed and
delivered in the
presence of
EDWARD K. DUTTON
41 John Dalton St, Manchester.
(Agent for the Patentees)
CJ APPLETON (L.S.)