IMPROVEMENTS IN STOPPERS FOR BOTTLES, JARS AND LIKE VESSELS to be as follows:
Year: 1884

page_text: I HENRY BARRETT, of Charterhouse Buildings, Goswell Road, in the county of
Middlesex, Aerated Water Manufacturer do hereby declare the nature of the said
invention for "IMPROVEMENTS IN STOPPERS FOR BOTTLES, JARS AND LIKE VESSELS
to be as follows:-
"
This invention relates to improvements in the manufacture of what are known
as screw-stoppers when such stoppers are made from plastic material such as
Lionite. It has been found in practice that such stoppers when in use give way at
the screw and to provide against this according to my present improvements I take
a tube of metal cut to a given length and I place the same in that part of the
die or mould used for forming the screw on the stopper; I then press or force
lionite or other suitable plastic material into the mould whereby the metal tube
will be forced out against the inner part of the die until it partakes of the form of
such die and by this means I obtain a stopper made of a plastic material with an
outer coating of metal. This outer coating may extend from the top of the stopper
to the bottom or it may extend only part of the way.
In some cases instead of placing a metal tube around the stem of the stopper as
above named I place a band of metal from the head downwards or from the
shoulder downwards; this band of metal passes around the bottom or point of the
stopper and forms a support to the thread of the screw and to the stem of
the stopper and prevents the stopper (made of a plastic material) forming itself to
the shape of the thread in the bottle neck and giving way at the points coming in
contact with the bottle neck, or I may place two bands crosswise, or the metal may
be made star shaped and pushed into the mould in which case the arms will form
up the sides of the mould and the composition will press it out to the form of
the screw..
Or the stopper of plastic material may be formed with a thread or screw of
metal by taking a screw thread of metal wire of the required diameter and pitch
this metal screw thread is placed in the mould so that it will fit in the screw part
of the mould; the plastic material is then pressed in as above named and I thereby
obtain a stopper made of a plastic material with a screw wire thread running
around the screw of the stopper.

page_text: In some cases I place a band around the shoulder in order to prevent the shoulder
from giving way, this band may be of metal or of ebonite or of any suitable
material stronger than the plastic material of which the stopper is made.
I sometimes encase the stem of the stopper by taking a tube of metal which
I form into a hollow screw; I then screw the same onto the stem of the stopper and
this outer coating may be kept in its place by means of pins or cement, or may be
fastened by means of a centre punch.
Or I may place a perforated plate of metal down the centre of the stopper the
edges of the metal plate being shaped to conform to the screw thread.
D
J. Anil 100%

page_text: "
I HENRY BARRETT of Charterhouse Buildings, Goswell Road in the county of
Middlesex, Aĕrated Water Manufacturer do hereby declare the nature of my said
invention for "IMPROVEMENTS IN STOPPERS FOR BOTTLES, JARS AND LIKE VESSELS
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 what are known
as screw stoppers when such stoppers are made from plastic material such as
lionite.
It has been found in practice that such stoppers when in use give way at the
screw and to provide against this according to my present improvements I take a
tube of metal cut to a given length and I place the same in that part of the die or
mould used for forming the screw on the stopper; I then press or force lionite or
other suitable plastic material into the mould whereby the metal tube will be
forced out against the inner part of the die until it partakes of the form of such
die and by this means I obtain a stopper made of a plastic material with an outer
coating of metal.
This outer coating may extend from the top of the stopper to
the bottom or it may extend only part of the way.
In some cases instead of placing a metal tube around the stem of the stopper as
above named I place a band of metal from the head downwards or from the
shoulder downwards; this band of metal passes around the bottom or point of the
stopper and forms a support to the thread of the screw and to the stem of the
stopper and prevents the stopper (made of a plastic material) forming itself to
the shape of the thread in the bottle neck and giving way at the points coming in
contact with the bottle neck, or I place two bands crosswise, or the metal may be
made star shaped and pushed into the mould in which case the arms will form up
the sides of the mould and the composition will press it out to the form of the
screw.
Or the stopper of plastic material may be formed with a thread or screw of
metal by taking a screw thread of metal wire of the required diameter and pitch;
this metal screw thread is placed in the mould so that it will fit in the screw part
of the mould, the plastic material is then pressed in as above named and I thereby
obtain a stopper made of a plastic material with a screw wire thread running
round the screw of the stopper.
In some cases I place a band around the shoulder in order to prevent the
shoulder from giving way, this band may be of metal or of other suitable material
stronger than the plastic material of which the stopper is made.
I sometimes encase the stem of the stopper by taking a tube of metal which I
form into a hollow screw, I then screw the same on to the stem of the stopper and
this outer coating may be kept in its place by means of pins or cement, or may be
fastened by means of a centre punch.
Or I place a perforated plate of metal down the centre of the stopper the edges
of the metal plate being shaped to conform to the screw thread.
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing in which figures 1 to 15
represent various stoppers manufactured according to my invention, the rubber
washer usually placed under the shoulder being omitted from the figures for the
sake of clearness. Figures 16 and 17 are sections shewing a suitable mould or die
which I employ in manufacturing the threaded part of the said stoppers and

page_text: figure 18 is a view of the blank or piece of metal I employ in one arrangement of
stopper. Similar letters in all the figures represent similar parts..
Figure 1, is an elevation and figure 2, a section of a stopper made of plastic
material and partly coated with metal according to my invention.
In manufacturing these stoppers I take a tube of metal a, cut to a given length
as shewn in figure 16 and I place the same in the mould or die b, used for forming
the screw thread on the stopper; lionite or other suitable material in a heated or
plastic state is then pressed or forced into the mould b, (previously heated if
required) whereby the metal tube a, will be forced out against the inner part of
the die and will be caused to take the shape of the mould b, and a screw stopper
will be thereby obtained mado of a plastic material c, with an outer coating of
metal a, on the periphery of the screw threaded stem as shewn in section at
figure 2. When the bottom end of the stopper is also to be coated with metal
I employ a thimble a¹, of metal as shewn in figure 17, and the plastic material
being forced in as above named a stopper is produced similar to that shewn in
section at figure 3.
Figures 4 and 5 are an elevation and a section respectively of a stopper when
provided with a band a, of metal extending longitudinally down each side of the
stopper and passing round the bottom or point of the stopper.
The stopper is manufactured in the manner hereinbefore described except that
in place of a tube of metal or a thimble being placed in the mould, a strip of metal
is placed therein and becomes embedded in the plastic composition.
Instead of employing a single band as shewn in figures 4 and 5 I sometimes
employ two bands placed crosswise, or the metal may be made of the shape of a
star or as shewn in figure 18 cross shaped.
To-form-the-stopper-the-metal-a, is pushed into the mould b, and the arms of
the cross will form up the sides of the mould when the composition is introduced
therein to press it out to the form of the screw; figure 6, is an elevation and
figure 7 a section of a stopper so formed a, representing the metal.
Figure 8 is an elevation and figure 9 a section on line A, B, of figure 8, shewing
a stopper of plastic material formed with a thread or screw a², of metal wire
running around the screw of the stopper; to manufacture this stopper the screw
thread of metal wire a, is placed in the mould so that it will fit in the screw part
of the mould and the plastic material is then pressed in the mould the ends of the
wire being secured by being turned inwards as shewn in figure 9, so as to be
imbedded in the plastic material.
Figure 10 is an elevation and figure 11 a section of a stopper having a band a³,
of metal or other suitable material around the shoulder to prevent the shoulder
from giving way; the lower part only of the screw thread in this arrangement is
shewn coated with metal a, but the metal casing may be arranged in any of the
other ways herein described.
Figure 12, is a section of a stopper made by screwing the stem c, of the stopper
previously moulded with a screw thread into a tube of metal formed into a hollow
screw; d, d, are the pins which I propose to employ for keeping the metal casing a,
in its place on the stem c; or it may be fastened by means of indentations formed
by means of a centre punch.
Figure 13, is an elevation and figure 14 a section on line C, D of figure 16
shewing a stopper of plastic material and having a perforated plate a, of metal
down the centre of the stem c, thereof the edges of the metal plate a, being shaped
to conform to the screw thread as shown in figure 14; the plate a, is provided
with a number of holes and is introduced into the stopper when the latter is
moulded whereby the composition will be forced into the said holes as shewn at e,
in figure 14, so as to keep the plate securely in position.
Figure 15 is a section of a screw stopper or cap made of plastic composition and
suitable for wide mouthed vessels. This cap is formed with an interior screw
thread coated with metal according to my invention and which will be understood
without further description.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
(1.) The manufacture of stoppers for bottles, jars and like vessels by pressing or
forcing suitable plastic material such as lionite into a mould or die into which a
tube, or a thimble, or a band, or other suitably shaped piece of metal or metal
wire has been previously placed substantially as herein before described and repre-
sented in figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 16, 17 and 18 of the
accompanying drawing.
(2.) The manufacture as herein described of stoppers for bottles, jars and liko
vessels by screwing a screw stopper body of moulded plastic material such as
lionite into a metal tube formed with a corresponding screw thread the two parts
being secured together by pins or otherwise substantially as herein before described
and represented in figure 12 of tho accompanying drawing.
(3.) The improved compound stoppers of plastic material and metal herein before
described and represented in figures 1 to 15 of the accompanying drawing.