IMPROVEMENTS IN in Rubber Manufacturers, THE MANUFACTURE OF INDIA RUBBER TYRES, AND IN APPARATUS TO BE USED FOR THE PURPOSE
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by Andrew James Wyley and Benoni
Collins at the Office of the Commissioners of Patents on the 27th June 1882.
ANDREW JAMES WYLEY and BENONI COLLINS both of the City of Manchester,
"IMPROVEMENTS IN
in the County of Lancaster, India Rubber Manufacturers,
THE MANUFACTURE OF INDIA RUBBER TYRES, AND IN APPARATUS TO BE USED
FOR THE PURPOSE
"
Our invention relates to the manufacture of tyres more particularly intended
for velocipedes and for other purposes.
The ordinary mode of manufacture has hitherto been to form the "cord" of
india rubber and then splice the ends together to make it into a circle, or endless,
and then place it in a ring mould constructed in two halves and bolted together,
the mould being then placed in the vulcanising pan, and when the "curing" is
completed the ring mould is removed, the two halves unscrewed and separated, and
the tyre taken out, but with the greatest practical accuracy in the making of the
Bould, & "fin," is left at the junction of the two halves of the moulds.
The moulds are very costly and bulky and there is considerable trouble in the
manufacture.
The object of our invention is to greatly reduce the cost of the moulds and of the
labour in the manufacture of india rubber tyres.
Onr improved method of manufacture consists in preparing the "cord" of india
rubber as in the ordinary process, of about the length and a little less thau the full
thickness or diameter of the finished tyre, we then draw the "cord" of india
rubber into a straight tube of metal, the bore or interior section of which corre-
sponds with the finished diameter or thickness of the intended tyre, we then cut
the surplus "cord" flush with the ends of the tube, which is next placed in the
vulcanising pan until the rubber is semi-vulcanised or "cured" when the tube is
removed and the cord is then drawn from the tube out of which it comes perfectly
smooth and of the desired section.
It is now cut to the required length to cement and splice the two ends together,
and is next put into the vulcanising pan again in the endless form to complete the
process of vulcanising or "curing."

page_text: We prefer to form the tube moulds of brass, but they must be lined or coated
with tin or other metal which is not readily acted upon by the india rubber and
the materials used in the process of "curing," otherwise the "cord" and tube will
adhere, and to facilitate the withdrawing of the semi-" cured" or vulcanised cord
from the tube the latter is submerged in, or coated in its interior, with a solution
of soft soap or other suitable lubricant and then is allowed to dry before the india
rubber cord is inserted to be semi-" cured" or vulcanised.
By another modification of our invention we make the moulds in the form of
two half moulds in a straight length, which halves are hinged or otherwise secured
together when the cord of india rubber has been inserted, and we then semi-
vulcanise the cord in this straight mould and treat it afterwards when taken from
the mould as above described.
The lubrication of the mould is not required when this construction of mould is
employed.