Improvements in obtaining Gutta Percha and in the Utilization of the Bye-products arising therefrom.
Year: 1897

page_text: Date of Application, 26th Aug., 1897
Comploto Specification Left, 26th May, 1898-Accepted, 6th Aug., 1898
PROVISIONAL SPECIFICATION.
Improvements in obtaining Gutta Percha and in the Utilization of
the Bye-products arising therefrom.
We, RICHARD JOHN FRISWELL, a Vice-President of the Institute of Chemistry,
Fellow of the Chemical Society, and a Manager and Director to Brooke, Simpson &
Spiller, Ld., and the said BROOKE, SIMPSON AND SPILLER, LIMITED, Chemical and
Dye Manufacturers, both of Atlas Works, Hackney Wick, in the County of Middlesex,
do hereby declare the nature of this invention to be as follows:-
The objects of our said invention are to obtain the substance known as gutta percha
in a new and convenient manner and at the same time to improve the condition and
increase the value of the substances, or bye-products resulting from the treatment
of the plants, or parts of plants from which the gutta percha is obtained.
In carrying out our said invention into practise, we macerate with caustic soda
the said plants, or parts thereof, in vessels known as straw, or esparto boilers, or in
vessels which are suitable modifications thereof, and wash and treat the product by
means of jiggers, dollies, or such other suitable devices as are well known to
manufacturers of "half-stuff," straw, esparto, or wood pulp. We then run the stuff
so treated onto a wire and felt, or other suitable paper, or board making machine
and over drying rollers, substantially as is done in the ordinary methods employed in
paper, card, or millboard manufacture, or by any suitable modification thereof, which
will produce a dry, porous mass of cellulose mixed with gutta percha in the shape of
sheets, boards, or other convenient form.
If now it be desired to separate the gutta percha from the said sheets, boards, etc.,
they are first reduced to convenient form and dimensions, and then treated with
suitable solvents until the gutta percha is extracted. The sheets, boards, etc., being
now free from gutta percha, become of commercial value, and can be used in the
manufacture of paper and similar bodies in the ordinary way.
If, on the contrary, it be desired to retain the gutta percha in the above mentioned
product from the esparto, straw, or other boiler, the said product may be mingled
with more or less esparto, straw, wood, rag, or other pulp, and the treatment with
solvents is not employed. By this means, a paper stuff is obtained, containing minute
particles of gutta percha diffused throughout its mass, and by passing this stuff
through the usual process, a gutta percha containing paper, or board is produced,
useful as air, or water-tight packing, or for insulating or other purposes.
D
2012
At 1002

page_text: Improvements in obtaining Gutta Percha and in the Utilization of
the Bye-products arising therefrom.
We, RICHARD JOHN FRISWELL, a Vice-President of the Institute of Chemistry,
Fellow of the Chemical Society, and a Manager and Director to Brooke, Simpson &
Spiller, Ld., and the said BROOKE, SIMPSON AND SPILLER, LIMITED, Chemical and Dye
Manufacturers, both of Atlas Works, Hackney Wick, in the County of Middlesex,
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:-
The objects of our said invention are to obtain the substance known as gutta
percha, in a new aud convenient manner, and at the same time to improve the
condition and increase the value of the substances, or bye-products resulting from
the treatment of the plants, or parts of plants from which the gutta percha is
obtained.
In carrying out our said invention into practice, we macerate with caustic soda,
or other suitable alkali, the said plants or parts thereof, in vessels known as straw, or
esparto boilers, or in vessels which are suitable modifications thereof, and wash
and treat the product by means of jiggers, drums, or such other suitable devices
as are well-known to manufacturers of "half stuff," straw, esparto, wood, or other
paper pulp. We then run the stuff, so treated, on to a wire and felt, or other
suitable paper, or board making machine, and over drying rollers, substantially
AS is done in the ordinary methods employed in paper, card, or millboard
manufacture, or by any suitable modification thereof, which will produce a dry,
porous mass of cellulose, mixed with gutta percha, in the shape of sheets, boards,
or other convenient form.
If now it be desired to separate the gutta percha from the said sheets, boards,
etc., they are first reduced to convenient form and dimensions, and then treated
with toluene, bisulphide of carbon, or other suitable solvent of gutta percha, until
the gutta percha is extracted, it being then precipitated from the solutions so
obtained; as described in the Specifications of our applications for Letters Patent,
No. 19727 and No. 19728, both of August 26th 1897.
The sheets, boards, etc., being now free from gutta percha, become of commercial
value, and can be used in the inanufacture of paper, and similar bodies in the
ordinary way.
If, on the contrary, it be desired to retain the gutta percha in the above
mentioned product from the esparto, straw, or other boiler, the said product may
be mingled with more or less esparto, straw, wood, rag, or other puip, and the
treatment with solvents is not employed. By this means, a paper stuff is obtained,
containing gutta percha diffused throughout its mass, and by passing this stuff
through the usual process, a gutta percha containing paper, or board is produced,
useful as air, or water tight packing, or for insulating, or other purposes.
Before finishing, the paper should be passed through a quantity of toluene,
bisulphide of carbon, or other suitable solvent of gutta percha, sufficient to insure
the even distribution of gutta percha throughout the mass, but not in such a
way as to remove it therefrom.
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 conversion of the products of the maceration with a suitable alkali, of gutta
percha containing plants, or parts thereof, into porous paper, millboard, or like

page_text: material, having gutta percha diffused throughout, or contained in its mass,
substantially as herein set forth.
2. The conversion of the products of the maceration with a suitable alkali, of gutta
percha containing plants, or parts thereof, into porous paper, millboard, or like
material having gutta percha diffused throughout, or contained in its mass,
and the extraction of gutta percha from the said material by means of toluene,
bisulphide of carbon, or other suitable solvent, and precipitation therefrom, substantially
as herein set forth.
3. The conversion of the products of the maceration with a suitable alkali, of gutta
percha containing plants, or parts thereof, into porous paper, millboard, or like
material, the combination of such material with ordinary paper stuffs, and the
conversion of the mixture so obtained into a gutta percha containing paper, millboard,
or like material, substantially as herein set forth.
4. The extraction, recovery, or purification of gutta percha by the treatment of
paper, inillboard, or like material containing gutta percha, with toluene, bisulphide
of carbon, or other suitable solvent of gutta percha, substantially as herein set
forth.
5. As a new article of manufacture, paper, millboard, or other like material
containing gutta percha, and prepared substantially as herein described and set forth
in Claim 1.
6. As a new article of manufacture, paper, millboard, or other like material,
prepared froin gutta percha containing plants, or parts thereof, and freed from gutta
percha, substantially as herein described and set forth in Claim 2.
7. As a new article of manufacture, paper, millboard, or other like material
containing gutta percha, and consisting of the combination, prepared substantially
ns herein described and set forth in Claim 3.
Dated the 20th day of May 1898.
AMBROSE MYALL,
2, Lancaster Place, London, W.C., Agent for. the Applicants.