provements in and relating to the Impregnating of Materials with Indiarubber, Guttapercha, and the like.
Year: 1896

page_text: Date of Application, 21st Aug., 1896
Complete Specification Left, 18th May, 1897-Accepted, 3rd July, 1897
PROVISIONAL SPECIFICATION
Improvements in and relating to the Impregnating of Materials with
Indiarubber, Guttapercha, and the like.
I, WILLIAM JOHN ALEXANDER DONALD, of 70 Great Clyde Street, in the City
and County of Glasgow, Managing Director of the Eglinton Chrome Tanning
Company Limited, do hereby declare the nature of my Invention to be as
follows:-
This Invention has reference to a new or improved method. of impregnating
or saturating materials such as chrome tanned or alum "tawed" or like mineral
tanned leather or cotton, canvas, or like fabrics or materials with a solution of
indiarubber, guttapercha, and the like, for purposes generally but more especially for
use in the construction of pneumatio tyres.
According to my improvements the material after it has been manufactured in any
known manner is dried and rendered quite free from any moisture.
It is then immersed in or passed through a warm bath of Naptha, Benzine,
Carbon-bisulphide, or other solvent until it is thoroughly saturated.
The material is afterwards drained or dried and placed in or passed through
a warm bath of the indiarubber, guttapercha or other solution with which the
material is intended to be impregnated, the solution preferably being of a thin
conaistency. The material is subsequently drained and dried or treated to remove
unnecessary surface deposit.
Dated the 20th day of August. 1898.
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow,
Agents.
Improvements in and relating to the Impregnating of Materials with
Indiarubber, Guttapercha, and the like.
I, WILLIAM JOHN ALEXANDER DONALD, of 70 Grent Clyde Street in the City and
County of Glasgow, Managing Director of the Eglinton Chrome Tanning Company,
Limited, do hereby declare the nature of my invention and in what manner the same
is to be performed to be particularly described and ascertained in and by the
following statement, that is to say:-
This Invention has reference to a new or improved method of impregnating
or saturating materials such as chrome tanned or alum "tawed" or like mineral
tanned leather or cotton, canvas, or like fabrics or materials with a solution of
indiarubber, guttapercha, and the like, for purposes generally but more especially for
use in the construction of pneumatic tyres.
According to my improvements the material after it has been manufactured in any
known manner is dried preferably in a hot room and rendered quite free from any
moisture.

page_text: It is then and preferably while still warm immersed in or slowly passed through
a warin bath of naptha, benzine, carbon-bisulphide, or other solvent until it is
thoroughly saturated the temperature of bath being preferably about from 60 to 70
degrees Fahrenheit.
The materials now containing a menstrum of solvent is afterwards drained or dried
of any unnecessary excess and placed in or slowly passed through a warm bath of the
indiarubber, guttapercha, or other solution with which the material is intended to be
impregnated, the solution preferably being of a thin consistency and at a temperature
of from 100 to 110 degrees Fahrenheit. The material is subsequently drained
and dried or treated to remove unnecessary surface deposit.
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 :-
First. The impregnating of the herein described materials by immersing same
in hot naptha, benzine, or other solvent, and than in a solution of indiarubber,
guttapercha, or the like substantially as set forth.
Second. Materials impregnated as described in claim 1, substantially as set
forth.
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow,
Agents.