IM- PROVEMENTS IN OR APPLICABLE TO THE ROLLERS EMPLOYED IN THE GRINDING OF THE CARDS USED IN THE CARDING OF COTTON AND OTHER FIBROUS MATE- RIALS, APPLICABLE ALSO TO STRICKLES."
Year: 1879

page_text: LETTERS PATENT to Joseph Standring Dronsfield, of the Firm of Drousfield
Brothers, of Oldham, in the County of Lancaster, for the Invention of IM-
PROVEMENTS IN OR APPLICABLE TO THE ROLLERS EMPLOYED IN THE GRINDING
OF THE CARDS USED IN THE CARDING OF COTTON AND OTHER FIBROUS MATE-
RIALS, APPLICABLE ALSO TO STRICKLES."
Sealed the 1st July 1879, and dated the 8th January 1879.
PROVISIONAL SPECIFICATION left by the said Joseph Standring Dronsfield
at the Office of the Commissioners of Patents on the 8th January 1879.
JOSEPH STANDRING DRONSFIELD, of the Firm of Dronsfield Brothers, of Oldham,
in the County of Lancaster. "IMPROVEMENTS IN OR APPLICABLE TO THE ROLLERS
EMPLOYED IN THE GRINDING of the CARDS USED IN THE CARDING OF COTTON AND
OTHER FIBROUS MATERIALS, APPLICABLE ALSO TO STRICKLES."
My Invention relates principally to the rollers employed in the grinding of tho
cards used in the carding of cotton and other fibrous materials. Such rollers consist
principally of cylinders covered with coarse emery which is cemented to the peri-
pheries of the cylinders. According to one method of construction, the said cylin-
ders are formed of sheet metal and covered with a hard cement to which the
particles of emery are rigidly cemented. In other cases the cylinders are made of
cast-iron, and are sometimes arranged to traverse in the direction of their axes to
and fro across the card covered surfaces to be ground. The object of my Invention
is to render the attachment of the said particles less rigid, and thereby to improve
the action of the grinding rollers and to increase the durability of the grinding
surfaces. To this end I interpose a layer of elastic material between the periphery
of the roller or cylinder and the coating of emery, or of any other grinding mate-
rial used in lieu thereof. The material which I consider to be most suitable is
vulcanized caoutchouc. I cover the roller or cylinder with sheet caoutchouc or
with an envelope of caoutchouc, and cement the grinding material to the surfaco
of the said caoutchouc with an elastic cement or glue, or with a suitable cement.
The cylinder may be inade of tin, sheet metal, cast iron, or other ordinary or suitable
Price Ad I

page_text: .material. I may vulcanise the caoutchouc whilst in position upon the cylinder, and
I may employ the vulcanising process to attach the coating of grinding material
or a part of it to the caoutchouc. My Invention is also applicable in the covering
of strickles or other appliances used in the grinding of cards.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Joseph Standring Dronsfield in the Great Seal Patent Office on
the 8th July 1879.
JOSEPH STANDRING DRONSFIELD, of the Firm of Dronsfield Brothers, of Oldham,
in the County of Lancaster. "IMPROVEMENTS IN OR APPLICABLE TO THE ROLLERS
EMPLOYED IN THE GRINDING OF THE CARDS USED IN THE CARDING OF COTTON AND
OTHER FIBROUS MATERIALS, APPLICABLE ALSO TO STRICKLES."
My Invention relates principally to the rollers employed in the grinding of the
cards used in the carding of cotton and other fibrous materials. Such rollers consist
principally of cylinders covered with coarse emery, which is cemented to the peri-
pheries of the cylinders. According to one method of construction, the said cylin-
ders are formed of sheet metal and are covered with a hard cement to which the
particles of emery are rigidly cemented. In other cases the cylinders are made of
cast-iron and are sometimes arranged to traverse in the direction of their axes to
and fro across the card covered surfaces to be ground. The object of my Invention
is to render the attachment of the said particles less rigid, and thereby to improve
the action of the grinding rollers and to increase the durability of the grinding
surfaces. To this end I interpose a layer of elastic material between the periphery
of the roller or cylinder and the coating of emery, or of any other grinding material
used in lieu thereof. The material which I consider to be most suitable is vul-
canised caoutchouc. I cover the roller or cylinder with slicet caoutchouc or with
an envelope of caoutchouc, and I cement the grinding material to the surface of the
said caoutchouc with an elastic cement, or with marine glue or ordinary gluo, or
with a cement which will cause the caoutchouc to adhere to the said roller or
cylinder. The cylinder may be made of tin, sheet metal, cast iron, or other ordinary
or suitable material, or be of any ordinary or suitable construction. I may vulcanise
the caoutchouc whilst in position upon the cylinder so as thereby to attach the
caoutchouc to the cylinder, and I may employ the vulcanising process to attach tho
coating of grinding material, or a part of it, to the caoutchouc. I may use other
suitably elustic materials in lieu of caoutchouc, as for example, I may use felt,
leather, woven material, kamptulicon, or elastic or semi elastic materials produced
by combining caoutchouc with cork, or with other matters, or I may use any mate-
rial or composition which will have the intended effect of providing such a founda-
tion for the grinding material as will yield to a suitable extent as herein before
indicated. My Invention is also applicable in the covering of strickles or other
appliances used in the grinding of cards.

page_text: Having now fully set forth and indicated the nature of my said Invention, and
the method of and means for carrying the same into practical effect, would have
it to be understood in conclusion that I claim with reference to the appliances for
the herein indicated uses,-
First. Covering or coating rollers, cylinders, or strickles with caoutchouc prepara-
tory to the application thereto of the coatings of emery or grinding material.
And secondly. Covering or coating rollers, cylinders, or strickles with a material
which will constitute an elastic or suitably yielding foundation for the grinding
material, substantially as and for the purpose herein before set forth and indicated.
In witness whereof, I, the said Joseph Standring Dronsfield, have hereunto
set my hand and seal, this Seventh day of July, in the year of our Lord
One thousand eight hundred and seventy nine.
Signed and sealed by the
said Joseph Standring
Dronsfield in
presence of
the
EDWARD K. DUTTON,
JOSEPH S. DRONSFIELD. (LS.)
Agent to the Patentee,
St. Ann's Churchyard,
Manchester.