Bottle Stoppers.
Year: 1886

page_text: Bottle Stoppers.
мо мацшаоцо
.
We, HENRY BARRETT, Stopper manufacturer, and JOHN JAMES VARLEY, Engineer,
both of No. 268 South Lambeth Road, in the county of Surrey, 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 improvements in the manufacture of thimbles or outer
coverings or casings made of vulcanite or equivalent material so as to serve for
compound screw stoppers formed of a plastic material forced into an outer tube or
thimble of vulcanite as described in the Specification of former Letters Patent
No. 5154 of 1881 granted to the said Henry Barrett; the invention also relates to
improvements in the manufacture of compound porcelain and vulcanite screw
stoppers such as are described in the Specification of the said former Lettors
Patent.
In manufacturing compound screw stoppers of vulcanite and a plastic material
such as lionite as described in the said former specification a tube or a thimble of
vulcanite was employed which tube or thimble (previously heated) was placed in a
heated mould and the plastic material was forced or pressed into the tube or
thimble so as to force the tube or thimble to take the shape of the mould.
We have found in practice that this method of manufacture is in some respects
attended with disadvantages as owing to the property peculiar to vulcanite the
vulcanite tube or casing of the stopper is liable when subjected to the action of
heat to reacquire its former shape thereby rendering in such case the stopper
useless. To obviate this defect it has been found advantageous to employ screwed
tubes or thimbles which are prepared by being made of vulcanite in the required
form and into which the plastic material intended to form the body or stem is
pressed or forced so as to complete the stopper but this mode of manufacture is
costly.
Our present invention consists in an improved mode of manufacturing screw
tubes or thimbles suitable for forming casings for the bodies of stoppers of the kind
in question, whereby we are enabled to produce them in a better and much more
economical manner than hitherto as hereinafter more particularly described
reference being had to the accompanying drawing.
In carrying out our invention we first mould a number of plain thimbles or
short tubes closed at one end, from material or dough such as is used in the
manufacture of vulcanite. One of such thimbles is shewn in elevation and section
respectively at figures 1 and 2 of the drawing. These thimbles are then partly.
"cured" that is to say, submitted to the treatment usually termed vulcanizing
treatment until the thimbles become elastic somewhat similar to vulcanized india
rubber.

page_text: We employ a number of shaped moulds or cores of the required size and shape of
the screwed stems or bodies of the stoppers to be manufactured. One of such
screw-shaped moulds or cores is shewn in elevation at figure 3 and in plan at
figure 4 of the drawing. These cores are made of earthenware or porcelain or
metal or other suitable heat resisting material. In practice we have found that
they may be very advantageously made of glazed porcelain or earthenware as such
material is cheap and the glazed surface allows the thimbles to be easily placed
thereon and removed therefrom as hereinafter described and is very suitable for
withstanding the heat to which the thimbles have to be submitted when the
vulcanizing process is being completed.
.
The thimbles or casings made as herein-before described are placed on the screw-
shaped moulds or cores and such tubes being elastic and having an internal
diameter somewhat less than the diameter of the cores or moulds taken at the
bottom of the thread, they will form or adapt themselves to and assume the shape
of the cores or moulds, that is to say, the thimbles will take the shape of a bollow
screw closed at the end: Figure 5 of the drawing is an elevation of one of these
moulds or cores with the thimble placed thereon.
The moulds or cores with the thimbles thereon are then submitted to heat until
the thimbles become converted into vulcanite in the well known manner.
The vulcanite thimbles thus formed can then be removed from the porcelain or
other cores or moulds and we thus produce in a simple and economical manner
screwed thimbles or tubes or casings of vulcanite or like material suitable for
being employed in the manufacture of compound stoppers of vulcanite and plastic
material..
The like method of manufacture may.be employed in manufacturing compound
stoppers of other external forms.
In manufacturing compound screw stoppers of porcelain (or like heat-resisting
material) and vulcanite according to this invention we employ plain thimbles of
partly cured rubber as above described "and place such thimbles on the screwed
porcelain stopper stems and then submit the stoppers to heat until the thimbles are
converted into vulcanite and the stoppers are complete.
•
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. The method herein described of manufacturing vulcanite thimbles or tubes to
be employed in the manufacture of compound screw stoppers.
2. The use in the manufacture of compound screw stoppers of screwed thimbles
made from plain thimbles of partly cured rubber afterwards converted into vulcanite
screwed thimbles in the manner herein-before described.
3. The improved method herein described of manufacturing compound stoppers
of porcelain (or like heat-resisting material) and vulcanite.
4. The improved compound stoppers of screwed or other forms made substantially
as described.
1000