Improvements in Cements and Plastic Compositions for Forming Counter Part Rollers or Plates used for Embossing Paper, Asbes- tos, or similar Impressible Fabrics in Hollow Relief.
Year: 1898

page_text: Date of Application, 9th Dec., 1898-Accepted, 11th Feb., 1899
Improvements in Cements and Plastic Compositions for Forming
Counter Part Rollers or Plates used for Embossing Paper, Asbes-
tos, or similar Impressible Fabrics in Hollow Relief.
I, DANIEL MANSON SUTHERLAND, Manufacturer, of Westholme, Sunbury
Common, in the County of Middlesex, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
My invention relates to plastic compositions which are applied when hot to
coat and form counterpart rollers used for embossing purposes in conjunction
with a metal roller having the design engraved thereon in intaglio.
The object of my invention is to obtain cheap and durable compositions which
are easily applied, and readily take and retain a sharp impression.
Hitherto such embossing has been performed by engraved metal rollers revolv-
ing in contact with counterpart rollers of paper, cotton, or metals when low relief
designs were desired; and for high relief by engraved metal rollers revolving
in contact with counterpart rollers of vulcanized indiarubber, or gutta percha
and caoutchouc separately or together, sometimes compounded with asbestos, driers,
and pigment.
My invention consists in new plastic compositions for embossing purposes by
means of counterpart rollers containing either solidified oil or tough pitch as an
essential constituent.
In preparing a cement in accordance with one part of my invention, I take
oxydised or solidified vegetable oil, preferably linseed or castor oil, and melt it
with suitable proportions of kauri gum, resin and driers to form a tough, elastic
and resilient body.
Kauri gum
Resin
Litharge
10 lbs.
10 lbs.
- 2 lbs.
These ingredients are melted and mixed together in a steam jacketed pan
fitted with arms or agitators. The cement thus formed may be rendered more
adhesive by the addition, while mixing, of from 2 to 5 per cent. of castor oil in
a liquid state.
To form the plastic composition for coating counterpart rollers I take-

page_text: The components are melted together as before described, and the plastic com-
position is formed of―
Hard cement as above
Cork dust or wood flour
Asbestos or whiting
Driers
all mixed as previously described.
123 lbs.
75 lbs.
55 lbs.
30 lbs.
In preparing a plastic composition according to another part of my invention
the cement is formed of tough pitch, or the residuum from the distillation of
vegetable oils, and resin with other materials mixed exactly in the way above
described. The following proportions have been found to produce a good plastic
composition.-
Tough pitch
Powdered resin
Cork dust or wood flour
Asbestos or whiting
Driers
-
22 lbs.
9 lbs.
-
30 lbs.
-
8 lbs.
-
1 lb.
This composition also may be rendered more or less hard by varying the pro-
portions of the pitch, resin and driers. These compositions are applied in a hot
plastic condition in the well-known manner for such purposes, and may be used
for plates as well as rollers.
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
claim is:-
1. A cement having as an essential constituent oxydised or solidified vegetable
oil substantially as and for the purposes herein before described.
2. A cement having as an essential constituent tough pitch or the residuum from
the distillation of vegetable oils substantially as and for the purposes herein-
before described.
3. The plastic compositions substantially as and for the purposes hereinbefore
described.
Data 3 711 J
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.