The Preparation of an India-rubber Substitute from Linseed Oil.
Year: 1899

page_text: Date of Application, 24th July, 1899
Complete Specification Left 24th 10-
1000
PROVISIONAL SPECIFICATION.
The Preparation of an India-rubber Substitute from Linseed Oil.
We, JAMES EDWARD BEDFORD and CHARLES SAMUEL BEDFORD, both of Kirkstall
Road, in the City of Leeds, Chemists, and FRANK REDDAWAY, of Didsbury Lodge,
Manchester, Belting Manufacturer, do hereby declare the nature of this inven-
tion to be as follows:-
This invention has for its object the preparation of an india-rubber substitute
from linseed oil.
We take baltic linseed oil and oxidise it at a temperature of 105° to 120°
Centigrade in the apparatus described in the Specification of J. E. & C. S. Bedford
No. 7742, 1893 until the oil has assumed a honey-like consistency. When this
point is reached which will occupy from four to six hours the speed of the agitator
is reduced and steam pressure is turned into the jacket of the oxidiser in order
to raise the temperature of the oil to 130° C. and the current of air passing through
the machine is shut off.
At this temperature a reaction occurs in the oil, moisture and gaseous products
being evolved and when this has ceased the oil is run out from the machine into
shallow pan set in an oil bath in such a manner that the temperature of the con-
ents of the pan can be regulated with nicety. In this vessel the oil is subjected
o a heat of 160° to 200° C. witu constant stirring until a sample on cooling has
semi solid consistency.
The oil is then vulcanised with sulphur in the ordinary manner.
Dated this 24th da
C T "
JAMES E. BEDFORD,
CHAS. S. BEDFORD,
FRANK
REDDAWAY.
au india-rubber Substitute from Linseed Oil.
We, JAMES EDWARD BEDFORD and CILARLES SAMUEL BEDFORD, both of Kirkstall
Road, in the City of Leeds, Chemists, and FRANK REDDAWAY, of Didsbury Lodge,
Manchester, Gentleman, 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:
-
This invention has for its object the preparation of an india-rubber substitute
from linseed oil.
We take baltic linseed oil and oxidise it at a temperature of 105° to 120°
Centigrade in the apparatus described in the Specifio..
Price 7

page_text: No. 7742, 1893 until the oil has assumed a honey-like consistency. When this
point is reached which will occupy from four to six hours the speed of the agitator
is reduced and steam pressure is turned into the jacket of the oxidiser in order
to raise the temperature of the oil to 130° C. and the current of air passing through
the machine is shut off.
At this temperature a reaction occurs in the oil, moisture and gaseous products
being evolved and when this has ceased the oil is run out from the machine into
a shallow pan set in an oil bath in such a manner that the temperature of the con-
tents of the pan can be regulated with nicety. In this vessel the oil is subjected
to a heat of 160° to 200° C. with constant stirring until a sample on cooling has
a semi-solid consistency.
For this
The oil is then vulcanised with sulphur in the ordinary manner.
purpose 3 per cent. by weight of sulphur is dissolved in the oil which is maintained
at a constant heat in a jacketted vessel by means of steam at 40 lbs. pressure
until the vulcanisation is complete.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. The herein described process for the preparation of an india-rubber sub-
stitute in which linseed oil is oxidised, whilst heated, by agitation with air and
afterwards boiled at a high temperature in order to expel moisture and gaseous
products the resulting oil being vulcanised by treatment with sulphur at steam
heat.
2. The use and application of the apparatus described for the purpose herein
set forth.
1 1000
JAMES E. BEDFORD,
CHAS. S. BEDFORD,
FRANK
REDDAWAY.