A NEW METHOD OF MOULDING INDIA-RUBBER AND GUTTA PERCHA
Year: 1855

page_text: LETTERS PATENT to Charles Goodyear, of No. 42, Avenue Gabriel
Champs Elysées, Paris, for the Invention of "A NEW METHOD OF MOULDING
INDIA-RUBBER AND GUTTA PERCHA."-A communication.
Sealed the 5th June 1855, and dated the 27th March 1855.
PROVISIONAL SPECIFICATION left by the said Charles Goodyear at the
Office of the Commissioners of Patents, with his Petition, on the 27th
March 1855.
I, CHARLES GOODYEAR, of No. 42, Avenue Gabriel, Champs Elysées, Paris,
do hereby declare the nature of the Invention for "A NEW METHOD OF
MOULDING INDIA-RUBBER AND GUTTA PERCHA" to be as follows:-
This Invention has for its object the manufacture of articles of india-rubber
or gutta percha, either separate or combined, or when combined with other
matters. For this purpose, these matters, or either of them, when kept in a
plastic state, are or is placed in a cylinder or vessel having a plunger working
therein, by which means the plastic matter is forced through a small passage
out of the cylinder or vessel by the plunger into a mould, the opening into
which is held securely opposite the passage from the cylinder or vessel with
the plunger.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Goodyear in the Great Seal Patent Office on the
11th September 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
GOODYEAR, of No. 42, Avenue Gabriel, Champs Elysées, Paris, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-seventh day of March, in the year of our
Lord One thousand eight hundred and fifty-five, in the eighteenth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Charles Goodyear, Her special licence that I, the said Charles
Goodyear, my executors, administrators, and assigns, or such others as I, the
said Charles Goodyear, my executors, administrators, and assigns, should at
any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might make;
use, exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention för "A NEW
METHOD OF MOULDING INDIA-RUBBER AND GUTTA PERCHA," a communication,
upon the condition (amongst others) that I, the said Charles-Goodyear, by an
instrument in writing under my hand and seal, should particularly describe
and ascertain the nature of the said Invention, and in what manner the same
was to be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date of the
said Letters Patent.
"
NOW KNOW YE, that I, the said Charles Goodyear, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement thereof (that is to say):-
This Invention has for its object the manufacture of articles of india-rubber
or gutta percha, either separate or combined, or when combined with other
matters. For this purpose, these matters, or either of them, when kept in a
plastic state are or is placed in a cylinder or vessel having a plunger working
therein, by which means the plastic matter is forced through a small passage
out of the cylinder or vessel by the plunger into a mould, the opening into
which is held securely opposite the passage from the cylinder or vessels with
the plunger.
And in order that the said new method of moulding india-rubber and gutta
percha may be most fully understood and readily carried into effect, I will
proceed to describe the manner in which I prefer to operate.

page_text: The machine which I employ is constructed in a similar manner to the
machines now employed for coating telegraphic wires with gutta percha; it
consists of a cylinder or barrel into which the india-rubber or gutta percha is
placed, and in the cylinder or barrel a piston works, being operated on by a
screw or rack and pinion, or otherwise. In the end of the cylinder is formed
a nozzle or orifice, through which the contents of the cylinder or barrel are
expressed by the motion of the piston; there is a steam jacket which envelopes
the cylinder and keeps the contained matters at a suitable temperature. The
moulds which I prefer to employ are generally constructed of two or more
pieces of metal, which are held together with bolts and nuts. The mould is
made with a suitable interior configuration for producing the article desired,
and there are passages which lead into the cavity of the mould, the largest of
which is for the purpose of introducing the plastic substance into the mould,
and the other is, or others are, for the purpose of allowing the air contained in
the mould to escape.
The mould thus constructed is brought with its large aperture against the
nozzle or aperture of the cylinder or barrel already mentioned, and is there
retained by screws and nuts, or in other suitable manner; then the piston is
caused to advance and force the india-rubber or gutta percha from the
cylinder or barrel into the mould, until it escapes from the air orifices thereof,
when the motion of the piston is to be arrested, and the mould removed.
When set, the moulded article is taken out of the mould, which is then ready
to be again filled.
Having thus described the nature of the Invention, and the manner of
performing the same, I would have it understood that I do not confine myself
to the exact details described; but what I claim is, the moulding of articles of
india-rubber or gutta percha, either separate or combined together, or with
other matters by forcing such matters when in a plastic state into moulds in
the manner described.
In witness whereof, I, the said Charles Goodyear, have hereunto set my
hand and seal, this Eighth day of September, in the year of our Lord.
One thousand eight hundred and fifty-five.
Witness,
FANNY GOODYEAR.
CHARLES GOODYEAR. (L.S.)