Improvements in the Manufacture of India Rubber Substitutes as applied to the Covers or Jackets for Pneumatic Tyres, for Cycles, Carriages, and all Classes of Vehicles.
Year: 1896

page_text: Date of Application, 6th Aug., 1896
Complete Specification Left, 6th May 1897-Accepted, 6th Aug., 1897
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of India Rubber Substitutes as
applied to the Covers or Jackets for Pneumatic Tyres, for Cycles,
Carriages, and all Classes of Vehicles.
I, JOHN COOPER, Managing Director of the Dermatine Company, Limited, 95 Neate
Street, London, S.E., do hereby declare the nature of this invention to be as
follows:-
I thoroughly grind and masticate together the following ingredients
India rubber
Gutta percha -
Carbonate of magnesia
Sulphuret of antimony
Shellac -
7 lbs.
- 2 lbs.
-
6 lbs.
-
2 lbs.
lb.
with sufficient sulphur and lime to vulcanize. I then coat, by spreading or by
friction a piece of the best closely woven linen such as is used for bed ticking with
the above material. I cut this on the bias in narrow strips and use two or more in
each jacket. This with the above material in thin solid sheets I mould and vulcanize
into any required shape for the jackets.
Dated this Sixth day of August 1896.
Improvements in the Manufacture of India Rubber Substitutes as
applied to the Covers or Jackets for Pneumatic Tyres, for Cycles
Carriages, and all Classes of Vehicles.
I, JOHN COOPER, Managing Director of Dermatine Company Limited, do hereby
declare the nature of this invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
I thoroughly grind together the following ingredients :-
India rubber
Gutta percha
-
Carbonate of magnesia
Sulphuret of antimony
Shellac
-
-
6 lbs.
2 lbs.
6 lbs.
-
2 lbs.
lb.
with sufficient sulphur and lime to vulcanize or "cure."
[Price 8d.]

page_text: When making the covers or jackets for pneumatic tyres, I coat, by spreading, or
by friction, a piece of the best closely woven linen, such as is used for bed ticking,
with the above material. I cut this on the bias in narrow strips of suitable width
for the jacket. Two or more strips may be used in each jacket, some being narrower
than the others so as to make the tread stouter than the edges. This with the above
material in thin solid sheets, I mould and vulcanize into any required shape for the
jackets.
For other articles such as belting, packing &c., I use 1 lb. of gutta percha, in place
of 2, in the above formula.
Belts are made in a similar manner to the jackets by covering strips of canvas
with the material and vulcanizing in a mould whilst for cup leathers and the like the
canvas is omitted the material being simply vulcanized in a mould.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is :-
1. The combination of india rubber, gutta percha, carbonate of magnesia, sulphuret
of antimony, shellac, lime and sulphur.
2. The combination of india rubber, gutta percha, carbonate of magnesia,
sulphuret of antimony, shellac, lime and sulphur, in substantially the proportions.
specified.