Improvements in or relating to the Manufacture of Rubber or other similar Gums.
Year: 1898

page_text: Date of Application, 30th Mar., 1898
Complete Specification Left, 30th Dec., 1898-Accepted, 4th Feb., 1899
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Manufacture of Rubber or other
similar Gums.
I, EDMOND GARNIER, of 309, Camberwell New Road, in the County of Surrey,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to the manufacture of rubber or other similar gums and
has for its object to dispense with vulcanisation and consequently the use of sul-
phur and to obtain a product which can be coloured as desired while possessing
the same properties as ordinary vulcanised rubber.
According to this invention the rubber or other gum has the powders usually
employed in such manufacture, thoroughly incorporated with it.
After a
thorough amalgamation of these substances has taken place, there is added
a certain quantity of a substance which is obtained by the following
special treatment of alum. Alum is dried in some convenient way, such as by
placing it upon heated iron plates, and when entirely freed from moisture it is
treated with a solution of terebinth or benzine and shellac or ambergris, resin
or other similar gum. The mixture is evaporated to dryness and the substance
thus obtained is dried and then incorporated with the mixture of rubber and other
powders, the whole being rolled out and otherwise treated according to the purpose
for which the product is intended to be used.
Any desired colouring matter may be introduced into the above described
mixture, the required shade being retained in the finished product, since the
specially treated alum does not act deleteriously on the colouring matter, as is the
case with the sulphur in the ordinary vulcanisation process.
It is to be understood that though sulphur may incidentally be present in the
mixture, it is not specially introduced as when the substance is intended to undergo
vulcanisation. Moreover the present mixture is never raised to a heat at all
approaching that at which vulcanisation sets in, the treated alum having the
desired "setting" effect upon the rubber at a comparatively low temperature.
The following is an example of one way in which the improved manufacture of
rubber may be carried out :-
I take alum and after it has been thoroughly dried I pour upon it a solution of
benzol and gum such as tragacanth evaporating the product to dryness.
I mix well together the powders which are usually employed in rubber manu-
facture such as whiting, barytes and lime. To these powders I add oxidised oil
and pure rubber with or without the addition of a certain quantity of gutta. When
these ingredients have been thoroughly mixed together I incorporate with them a
certain quantity of the specially treated alum, passing the compound through mix-
ing rollers in the cold. Finally I add the required coloring matter and pass the
substance through the calendering rolls.
8011
1
1 1000
BOULT & WADE,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to the Manufacture of Rubber or other
similar Gums."
I, EDMOND GARNIER, of 309, Camberwell New Road, in the County of Surrey,
Engineer, 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 relates to the manufacture of rubber or other similar gums and
has for its object to dispense with vulcanisation and consequently the use of sul-
phur and to obtain a product which can be coloured as desired while possessing
to a certain extent the same properties as ordinary vulcanised rubber.
Acording to this invention the rubber or other gum has the powders usually
employed in such manufacture or other suitable ingredients thoroughly incorpor-
ated with it. After a thorough amalgamation of these substances has taken place,
there is added a certain quantity of a substance which is obtained by the following
special treatment of alum. Alum is dried in some convenient way, such as by
placing it upon heated iron plates, and when entirely freed from moisture it is
treated with a solution of terebinth or benzol and shellac or ambergris resin
or other similar gum. The mixture is evaporated to dryness and the substance
thus obtained is dried and then incorporated with the mixture of rubber and other
powders, the whole being rolled out and otherwise treated according to the purpose
for which the product is intended to be used.
Any desired colouring matter may be introduced into the above described
mixture, the required shade being retained in the finished product, since the
specially treated alum does not act deleteriously on the colouring matter, as is the
case with the sulphur in the ordinary vulcanisation process.
It is to be understood that though sulphur may incidentally be present in the
mixture, it is not specially introduced as when the substance is intended to undergo
vulcanisation. Moreover the present mixture is never raised to a heat at all
approaching that at which vulcanisation sets in, the treated alum having the
desired "setting" effect upon the rubber at a comparatively low temperature.
The following is an example of one way in which the improved manufacture of
rubber may be carried out:-
Alum is taken, say 8 ounces and after it has been thoroughly dried a solution
of benzol and a gum such as tragacanth, is poured upon it, the solution being com-
posed of say, part of gum in 20 parts of benzol. The product is evaporated to
dryness.
The powders usually employed in the manufacture of rubber are mixed well
together. These powders may be in the proportion of 3 pounds of ground whiting,
one pound of barytes and 8 ounces of lime. To these powders is added say
pound 8 ounces of oxidised oil, a certain quantity of rubber, say 8 ounces and also
preferably about 8 ounces of redeemed gutta. When these ingredients have been
thoroughly mixed together, the specially treated alum is incorporated with them,
the whole compound being passed through mixing rollers in the cold. Finally the
necessary quantity of colourant, if the product is to be coloured, is added. "This
may be in the proportion of about 2 pounds for the above mentioned quantities.
The substance is now passed through the calendering rolls.
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
1 claim is
1. In the manufacture of rubber without vulcanisation the combination with

page_text: suitable ingredients of alum treated with a solution of a gum in a spirit as set
forth.
2. In the manufacture of rubber without vulcanisation the combination with
suitable ingredients of alum treated with a şolution of gum targacanth in benzol
as set forth.
3. In the manufacture of rubber the combination with whiting, barytes, lime and
other powders usually employed in such manufacture of alum treated with a
solution of a gum in a spirit, oxidised oil, gutta, a colourant, and rubber as set
forth.
,
4. In the manufacture of rubber, the combination with whiting, barytes, lime
and other powders usually employed in such manufacture of alum treated with a
solution of gum, tragacanth in benzol, oxidised oil, gutta, a colourant, and rubber
as set forth.
5. In the manufacture of rubber, the combination with whiting, barytes, lime
and other powders usually employed in such manufacture of oxidised oil, gutta,
rubber and alum treated by a solution of gum tragacanth in benzol as set forth.
Dated this 30th day of December 1898
EDMOND GARNIER.
Boult & Wade,
Agents for the Applicant.
EDMOND GARNIER.
Boult & Wade,
Agents for the Applicant.