Year: 1887

page_text: Date of Application, 19th Oct., 1887
Complete Specification Left, 19th July, 1888.
Complete Specification Accepted, 24th Aug., 1888
We, HENRY BARRETT, Stopper Manufacturer, and JOHN JAMES VARLEY, Engineer,
both of 268, South Lambeth Road, in the County of Surrey, do hereby declare the
nature of this invention to be as follows:-
Our improvements relate to the manufacture of screw stoppers for bottles when such
stoppers are made from plastic compounds by means of moulds.
According to the present method of manufacturing screw stoppers from plastic
compounds, the compound is generally made by means of mixing-rollers suitably
heated, or in pans, or coppers, or on hot plates, in order that the gums used in such
compound may be softened.
When the ingredients forming the compound have been thoroughly mixed and
incorporated into a stiff dough, small portions of this dough are deposited in moulds
and pressed into the form of screw stoppers; the required portion or amount of
compound for each mould now depends upon the skill of the operator and owing to
the nature of the compound the said operation is often attended with serious
inconvenience as the compound while undergoing the operation is frequently chilled
and parted and will not then become perfectly united in the mould, besides which much
loss of time is incurred and imperfect stoppers are made.
According to our invention we mix the compound by any of the present well known
methods and we pass the compound through forming. rollers constructed to form the
compound into what we call blanks; these blanks are of suitable shape and contain
the amount of composition required for each stopper. The blanks are then heated,
if necessary, to soften them and are placed in the usual moulds and pressed into form
in the usual manner.
By this method we effect a saving in labour, time and material, and obtain a more
perfectly constructed stopper.
1007
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements relating to the Manufacture of Screw Stoppers.
We, HENRY BARRETT, Stopper Manufacturer, and JOHN JAMES VARLEY, Engineer,
both of 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 :-
Our improvements relate to the manufacture of screw stoppers for bottles when
such stoppers are made from plastic compounds by means of moulds.
According to the present method of manufacturing screw stoppers from plastic
compounds, the compound is generally made by means of mixing-rollers suitably
heated, or in pans, or coppers, or on hot plates, in order that the gums used in such
compound may be softened.
When the ingredients forming the compound have been thoroughly mixed and
incorporated into a stiff dough, small portions of this dough are deposited in moulds
and pressed into the form of screw stoppers; the required portion or amount of
compound for each mould now depends upon the skill of the operator and owing to
the nature of the compound the said operation is often attended with serious 1
inconvenience as the compound while undergoing the operation is frequently chilled
and parted and will not then become perfectly united in the mould, besides which
much loss of time is incurred and imperfect stoppers are made.
According to our invention we mix the compound by any of the present well known
methods and we pass the compound through forming rollers in which there are
recesses of the required size which operate as moulds and form the required amount
of. prepared compound into what we call blanks; these blanks are thus of suitable
shape and contain the amount of prepared composition in a homogeneous state as
required for each stopper. The blanks are then heated, if necessary, to soften them
and are placed in the usual moulds and pressed into form in the usual manner.
By this method we effect a saving in labour, time and material, and obtain a more
perfectly constructed and homogeneous stopper as the method of forming the plastic
compounds into blanks gives an uniform consistency or grain to the material which is
retained in the moulded stopper.
In the accompanying drawing we have shown in front elevation at Figure 1, and a
in part sectional elevation at Figure 2, a pair of rollers recessed at a, a, a in such a
manner as to form plastic material when passed between the rollers into blanks similar
to the one illustrated in Figure 3, and which form of blank is suitable for being
moulded into screw stoppers such as are used for stoppering beer bottles; b, figure 2,
shews the trough for feeding the material to the rollers.
It will be obvious that other forms of blanks can be made such as those shown in
Figures 4 and 5 by employing rollers having correspondingly shaped recesses.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what
we claim is —
1 In the manufacture of screw stoppers from plastic material, forming the material
into blanks by means of recessed rollers or equivalent mechanical means, substantially
as, and for the purpose, hereinbefore described.
2. In the manufacture of screw stoppers from plastic material, the use of rollers
such as are herein described and illustrated in Figures 1 and 2 of the drawing for
forming the plastic material into blanks ready for the moulds, substantially as herein-
before described.
3. Screw stoppers manufactured from plastic material formed into blanks by
mechanical means, substantially as hereinbefore described.
Dated th 1011 1
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicants.