An Improved Composition and Process for its Manufacture.
Year: 1898

page_text: Date of Application, 9th July, 1898-Accepted, 27th Aug., 1898
COMPLETE SPECIFICATION.
An Improved Composition and Process for its Manufacture.
1, JEANNIE MACNEIL, of 405, Eglinton Street, Glasgow, 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 a composition which is capable of being used for
many purposes and is specially adapted for making articles which, at present,
are generally made of gutta-percha, rubber, wood, mortar, etc. The composition,
whilst soft or plastic, can be easily shaped or moulded, or, if necessary, it can be
rolled out into sheets.
The composition, constituting the invention consists of glue and (or) gelatine,
bichromate of potash or its chemical equivalent, and gelatinous animal tissue,
such as skins, intestines, sinews, etc.
and
In 100 parts of the composition, by weight, there may be from 25 to 35 parts
gelatine and from 1 to 2 parts of bichromate of potash or its chemical
equivalent, the remaining parts being the animal tissue.
of glue
or
The process of manufacturing the composition is as follows:-
The gelatinous animal tissue is spread out or laid out in any convenient place
so that it can be dried by the atmosphere until almost entirely free from moisture.
It is then put in a moderately heated place where the remainder of the moisture
in the substance is entirely dried up. The heated place, such as a hot room or
the like, must not be heated to a temperature, greater than 150° Fahrenheit.
The animal tissue after being thoroughly dried, is disintegrated in well
known and suitable form of disintegrator capable of pounding or reducing the
tissue to a powder; or, if so desired, for certain requirements, the tissue, instead
of being disintegrated, can be cut or shred into pieces in any suitable and well
known cutting or shredding machine.
and
or
any
The glue
gelatine is soaked with water until soft, and is then mixed with
the powdered or cut or shredded animal tissue in a suitable vessel, such as a
tin pan, which is heated to a moderate extent care being taken not to heat the
substances to such an extent as to burn them. Whilst being heated the substances
are stirred.
and
or
Instead of heating the substances in a pan or vessel as before described they can
be placed in a mixing machine to which sufficient heat can be applied to melt
the glue
gelatine whilst it is being mixed with the animal tissue. A suitable
"Hale's mincer." This
mixing machine for this purpose I have found to be a
mincer, as at present supplied upon the market, is without any heating device and
to enable it to be heated I secure to the under-half of the drum a steam jacket-
chamber which can be made in the usual manner and which is provided with
inlet and outlet tubes for conveying steam to and from the jacket-chamber. The
steam is supplied from a boiler and by regulating the steam, at the boiler, in the

page_text: usual manner, the mixer can be kept at a suitable temperature which should not
exceed 250° Fahrenheit in order to prevent the composition being injuriously
affected. The mixer, as it is operated, which can be performed by hand or power
according to the size of the machine, delivers the composition through the outlet
tube in the usual manner. By placing a suitable nozzle on the outlet tube of
the machine the composition can be delivered in the form of rods if so desired.
The bichromate of potash is dissolved in hot water and some of the solution can
be added to the mixture whilst mixing; or, if so desired, the composition can be
steeped or dipped in the solution after it has been delivered from the machine;
or the articles made from the composition can be steeped or dipped in the solution.
By adding carbolic acid to the composition it is disinfected, preserved, and
caused to retain its softness for a long time.
I have given the above proportions of the ingredients forming the composition
merely by way of example and as an indication of what I have found to answer
well in practice, but it is to be understood that these proportions can be altered
to suit different requirements as regards the hardness or softness or the density or
the weight of the composition.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
consider novel and desire to claim is:
and
A composition capable of being shaped or moulded or rolled out into sheets
having as its ingredients or principal ingredients glue gelatine, bichromate
of potash or its equivalent, and a gelatinous animal tissue, said composition being
formed by the process and in the manner substantially as hereinbefore described.
Dated this 8th day of July 1898.
or
H. D. FITZPATRICK,
100, Wellington Street, Glasgow,
Agent.