Improvements in the Manufacture of Parti-colored India Rubber.
Year: 1897

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 Comptroller General of the 11th day of January 1898.
Date of Application, 25th Feb., 1897
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Parti-colored India Rubber.
I, JAMES GEORGE INGRAM of The London India Rubber Works, Felstead
Street, Hackney Wick, in the County of London, India Rubber Manufacturer,
do hereby declare the nature of this invention to be as follows:-
The invention has for its object improvements in the manufacture of parti-
colored rubber to be used for various manufacturing purposes.
In carrying my invention into effect I take sheets of unvulcanized india rubber
of various colors and substances and with either plain or uneven surface and roll
them up into cylindrical or rope form. I then place the said roll as it is in a
somewhat larger mould than itself or I first fold, roll, coil or double up said roll
and then place it in the mould aforesaid. I then submit it to great pressure and
thus produce a solid block having throughout its body a variety of grain or a
variously parti-colored appearance. This block is left for some time under
pressure and after removal from the mould it is cut into sheet which may be
employed in the manufacture of various articles.
By varying the forms, substance and colors of the sheets, grain of wood and a
vast variety of other designs may be produced.
Dated Tahmuary 25th 1897
HARRIS & MILLS,
23 Southampton Buildings, London, W.C., Agents.
COMPLETE SPECIFICATION (AMENDED).
Improvements in the Manufacture of Parti-colored India Rubber.
I, JAMES GEORGE INGRAM, of The London India Rubber Works, Felstead
Street, Hackney Wick, in the County of London, India Rubber Manufacturer,
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 invention has for its object improvements in the manufacture of parti-
colored rubber to be used for various manufacturing purposes.
In carrying my invention into effect I take sheets of unvulcanized india rubber
rn 077

page_text: of various colors and substances or thicknesses and with either plain or uneven
surface which latter may be produced in any well known manner, such for instance
as rolling the rubber between calendars on to a rough or uneven surfaced cloth or
fabric, or the surface of the calendars may be suitably engraved or roughened, and
having placed two or more of such sheets in close contact I roll fold, crumple or
double them up into helical, cylindrical, rope or other form. I then place the said
roll or other form, if large enough, as it is in a mould somewhat larger than itself
or I first fold, roll, coil or double up said roll and then place it in the mould afore-
said or I may combine several of such rolls or blocks into a mass and then place it
in such mould after which I submit it to great pressure and thus produce a solid
block having throughout its body a variety of grain or a variously parti-colored
appearance.
This block is left for some time under pressure and after removal from the
mould it is cut into sheets which may be employed in the manufacture of various
articles.
By varying the forms, substance or thickness and colors of the sheets, grain of
wood and a vast variety of other designs may be produced.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I wish it to be understood
that I am aware that it is not a novelty to make variegated sheet rubber by manipu-
lating consolidated layers of rubber of different colors, and I make no claim broadly
to the same, but I declare that what I claim is:-
1. The herein described method of producing parti-colored india rubber
consisting in placing two or more sheets of unvulcanized rubber of various colors
and substances in close contact, rolling, folding, crumpling or doubling them into
cylindrical, rope or other form, placing the mass in a mould, applying great
pressure thereto and finally cutting the mass into sheets, substantially as herein
described.
2. The herein described method of making parti-colored india rubber consisting
in placing two or more sheets of unvulcanized rubber of various colors and
substances in close contact, rolling, folding, crumpling or doubling them into
cylindrical, rope or other form, folding, rolling, coiling or doubling up said roll
or other form, placing one or more of said masses in a mould and applying great
pressure and finally cutting the mass into sheets, substantially as herein described.
3. The improvements in the manufacture of parti-colored india rubber, substan-
tially as herein described.
Dated M... 10th 1007
HARRIS & MILLS,
23 Southampton Buildings, London, W.C., Agents.