Year: 1898

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by the
decision of the Chief Examiner, of the 27th day of January, 1899.
I, CHESTER IVES, of 57, Berners Street, Oxford Street, London, in the County of
Middlesex, Journalist, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improved process of manufacturing articles from a plastic
composition of gelatine, glycerine, and bichromate of potash, or its equivalent either
alone or in combination with some material such as ground cork as a basis, and it
consists in mixing and treating the materials in an anhydrous condition whereby the
action of the bichromate of potash or its equivalent on the gelatine is almost entirely
delayed until the composition has been moulded or otherwise caused to assume its
final shape.
In carrying out this invention I take gelatine and bichromate of potash--both in a
dry form-proportions of about ten parts of gelatine to one part of bichromate of
potash. These are both finely ground and thoroughly mixed, after which anhydrous
glycerine is added to it, the proportion of glycerine being regulated according to the
desired flexibility or elasticity of the articles to be produced.
Another method of procedure is to first mix the bichromate of potash with the
anhydrous glycerine and afterwards incorporate it with the powdered gelatine.
The composition when mixed is immediately moulded or otherwise treated to give
it the desired shape and is subjected under pressure to a temperature of about 300°
Fahrenheit. This heat produces two effects. First it causes the composition to
become soft and thus allow it readily to take any desired form or shape, and secondly
it sets up the chemical action between the bichromate of potash and the gelatine
whereby the composition is rendered both elastic tough and insoluble.
To facilitate the moulding, the composition may be rolled directly it is mixed.
Dated this 4th day of repruary 1898.
ROBERT E. PHILLIPS, Assoc. M. Inst. C. E., M. I. Mech. E.,
Consulting Engineer and Patent Agent, 70, Chancery Lane, London, W.C.,
Agent for the Applicant.

page_text: Plastic Compositions.
I, CHESTER IVES, of 57, Berners Street, Oxford Street, London, in the County of
Middlesex, Journalist, 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 an improved process of manufacturing articles from a
plastic composition of gelatine or its equivalent, glycerine, and bichromate of potash,
(potassium bichromate) or its equivalent, either alone or in combination with some
neutral material as a basis, and it consists in mixing and treating the materials in an
anhydrous condition whereby the chemical action of the bichcromate of potash or its
equivalent on the gelatine or its equivalent is so slow that the composition can be
conveniently moulded or otherwise caused to assume the shape of the finished article
before the chemical action has advanced so far as to prevent the perfect adhesion of
the molecules of the composition and subsequently intensifying or hastening the
chemical action by the application of heat.
In carrying this invention into practice I take gelatine or its equivalent and
bichromate of potash or its equivalent-both in a finely powdered state and in an
absolutely dry state-in proportions of about 10 parts of gelatine to 1 part of
bichromate of potash and thoroughly mix them together. To this is added anhydrous
glycerine the proportion being regulated according to the flexibility or elasticity of
the article to be produced.
The composition thus produced is immediately moulded or otherwise treated to
produce the desired article and is subjected while under pressure to a temperature
of about 300 Fahrenheit. To facilitate the moulding of the composition it may be
kneaded or rolled after mixture.
When it is desired to increase or decrease the weight or bulk of the article
the composition may be adulterated with any suitable neutral substance. For
instance if increased bulk is required cork in a powdered or granulated state may
be employed.
An alternative method is to mix the powdered bichromate of potash or its equiva-
lent with the anhydrous glycerine and afterwards incorporate it with the powdered
gelatine or its equivalent.
By using the ingredients in a dry state I secure the advantages resulting from
obtaining the final product. in an anhydrous condition. Not only does this affect
the final product but it gives great advantages in the manufacture as the
substance can be accurately moulded and the manufacture can be carried on with
much greater speed.
By the application of heat to the composition when it is under pressure, the
chemical action between the bichromate of potash and the gelatine is hastened
so that the chemical change is effected in a short space of time.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I wish it to be
understood that I am aware that it has been previously proposed to employ gelatine,
bichromate of potash, and glycerine in the manufacture of plastic compositions, and
I declare that what I claim is :-
(1) The improved range for the manufacture of tiles

page_text: gelatine, bichromate of potash, and glycerine, consisting in using and mixing the
said ingredients in an anhydrous condition, substantially as set forth.
(2) The improved plastic composition herein described.
1000
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Chartered Patent Agent, 70, Chancery Lane, London, W.C.,
Agent for the Applicant.