IMPROVEMENTS IN THE MANUFACTURE OF STOPPERS FOR BOTTLES FOR CONTAINING AËRATED OR GASEOUS LIQUIDS." PROVISIONAL SPECIFICATION
Year: 1879

page_text: LETTERS PATENT to Henry Barrett, of Hampton, in the County of Middlesex,
and John Bailey, Manager of the India Rubber, Gutta Percha, and Telegraph
Works Company, Limited, of Silvertown, in the County of Essex, for the
Invention of "IMPROVEMENTS IN THE MANUFACTURE OF STOPPERS FOR BOTTLES
FOR CONTAINING AËRATED OR GASEOUS LIQUIDS."
PROVISIONAL SPECIFICATION left by the said Henry Barrett and John
Bailey at the Office of the Commissioners of Patents on the 13th May 1879.
HENRY BARRETT, of Hampton, in the County of Middlesex, and JOHN BAILEY,
Manager of the India Rubber, Gutta Percha, and Telegraph Works Company,
Limited, of Silvertown, in the County of Essex. "IMPROVEMENTS IN THE MANU-
FACTURE OF STOPPERS FOR BOTTLES FOR CONTAINING AËRATED OR GASEOUS
LIQUIDS."
Our Invention relates to improvements in that class of internal stoppers for
bottles for containing aërated or gaseous liquids, which have hitherto been made
of a stem or body of ebonite, glass, porcelain, or other suitable heavy material, on
which is placed a washer or tube of india rubber; the object of this part of our
Invention being to avoid the inconvenience and loss resulting from the said washer
or tube coming off the stem.
In carrying out this part of our Invention we make the india rubber washer or
tube in the dough state of two distinct kinds of dough, the inner lining being made
with a dough having the requisite amount of sulphur to convert it into ebonite or
bard rubber when subjected to heat, and the remaining portion of the washer or
tube being made with a dough containing a less amount of sulphur so as to form
soft vulcanized india rubber when subjected to heat, the washer or tube being thus
formed in the dough state united in one piece, but made with two doughs con-
taining each a different amount of sulphur. In making these washers or tubes as
is the general custom in the trade, wo form a cylinder twelve or eighteen inches
long, the inner lining consisting of a dough with the larger amount of sulphur in,
and the remaining portion of a dough with the lesser amount of sulphur in, and cut
the washers or tubes from the cylinder the thickness or length required; by
preference, before cutting the washers or tubes off we partially vulcanize the

page_text: cylinder, and thus make the portion made from the ebonite dough into elastic
rubber, but this is not absolutely necessary; the washers or tubes may be cut off
the cylinder in its dough state. We then take the washer or tube either in the
dough or partially vulcanized state, and stretch it over the ebonite, glass, wood,
or other stem, and put the two together into the vulcanizing or curing pan and
subject them to the necessary amount of heat, by which process the washer or tube
becomes perfectly vulcanized, the inner lining being cured hard and the remaining
portion being soft and elastic, the whole in one piece; thus we obtain a stopper
fitted with an elastic washer or tube that cannot be moved, and ready for placing
in the bottle.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Henry Barrett and John Bailey in the Great Seal Patent Office
on the 13th November 1879.
HENRY BARRETT, of Hampton, in the County of Middlesex, and JOHN BAILEY,
Manager of the India Rubber, Gutta Percha, and Telegraph Works Company,
Limited, of Silvertown, in the County of Essex. " IMPROVEMENTS IN THE MANU-
FACTURE OF STOPPERS FOR BOTTLES FOR CONTAINING AERATED OR GASEOUS
LIQUIDS."
Our Invention relates to improvements in that class of internal stoppers for
bottles for containing aërated or gaseous liquids, which have hitherto been made
of a stem or body of ebonite, glass, porcelain, or other suitable heavy material, on
which is placed a washer or tube of india rubber; the object of the Invention being
to avoid the inconvenience and loss resulting from the said washer or tube coming
off the stem.
In carrying out our Invention we make the india rubber washer or tube in
the dough state of two distinct kinds of dough, the inner lining being made with
a dough having the requisite amount of sulphur to convert it into ebonite or hard
rubber when subjected to heat, and the remaining portion of the washer or tube
being made with a dough containing a less amount of sulphur so as to form soft
vulcanized india rubber when subjected to heat; the washer or tube being thus
formed in the dough state, united in one piece, but made with two doughs con-
taining each a different amount of sulphur. In making these washers or tubes, as
is the general custom in the trade, we form a cylinder twelve or eighteen inches
long, the inner lining consisting of a dough with the larger amount of sulphur in,
and the remaining portion of a dough with the lesser amount of sulphur in, and
cut the washers or tubes from the cylinder the thickness or length required; by
preference, before cutting the washers or tubes off we partially vulcanize the
cylinder and thus make the portion made from the ebonite dough into elastic
rubber, but this is not absolutely necessary; the washers or tubes may be cut off
the cylinder in its dough state. We then take the washer or tube either in the
dough or partially vulcanized state and stretch it over the ebonite, glass, wood, or
other stem, and put the two together (preferably in moulds) into the vulcanizing or
curing pan, and subject them to the necessary amount of heat, by which process
the washer or tube becomes perfectly vulcanized, the inner lining being cured hard
and the remaining portion being soft and elastic, the whole in one piece; thus we
obtain a stopper fitted with an elastic washer or tube that cannot be moved, and
ready for placing in the bottle.
Having thus described our said Invention, and the manner of performing the same,
we would have it understood that we do not claim any particular form or descrip-
tion of the stem portion of the stopper; but what we do claim is,—
The making of the washer composed of two doughs, the inner portion containing
a larger quantity of sulphur, and the outer portion a sinaller quantity of sulphur,
and then vulcanizing the washer onto the stem or body of the stopper, and thus
obtaining a hard and soft washer combined fitted on to the body of the stopper,
as herein before described.
In witness whereof, I, the said John Bailey, for and on behalf of myself
and the said Henry Barrett, have hereunto set my hand and seal, this
Twelfth day of November, in the year of our Lord One thousand eight
1
JNO. BAILEY. (L.S.)