Improvements in Moulds for the Manufacture of Tobacco Pipes.
Year: 1892

page_text: Date of Application, 8th Sept., 1892
Complete Specifica ion Left, 25th Feb., 1893-Accepted, 20th May, 1893
PROVISIONAL SPECIFICATION.
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Improvements in Moulds for the Manufacture of Tobacco Pipes.
I, William WHITE of 201 St. John's Hill New Wandsworth in the County of
Surrey, Gentleman, do hereby declare the nature of this invention to be as
follows:
In the manufacture of clay pipes metal moulds are employed. The mould
divides symmetrically into two parts; and it receives a plunger which fashions
the interior of the bowl. The mould is also provided with a guide for the plunger
immediately over the cavity in which the bowl is formed. When the mould is
charged with clay and the plunger descends the superfluous clay is expelled and
escapes between the top of the bowl cavity and the guide; it is then cut off
around the mouth of the bowl.
This arrangement works well when moulding clay which requires but little
pressure. The object of my invention however is to adapt such moulds to the
use of materials which require a much greater pressure to fashion and consolidate.
This I do by providing a wedge or filling piece which fits into the space between.
the plunger guide and the bowl cavity of the mould. The plunger descend's
through a hole in the filling piece into the bowl cavity and the material in the
mould is exposed to great pressure as it is able to escape only at the further
end of the mould or by any minute crevice which may be left by imperfect
closing.
When the moulding is complete the plunger is withdrawn the wedge or the
filling piece is removed and the mould is opened.
Dated this 8th day of September 1892.
WILLIAM WHITE.
COMPLETE SPECIFICATION.
Improvements in Moulds for the Manufacture of Tobacco Pipes.
I, WILLIAM WHITE of 201 St. John's Hill, New Wandsworth, in the County
of Surrey, (no occupation) 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:-
In the manufacture of clay pipes metal moulds are employed. The mould
divides symmetrically into two parts and it receives a plunger which fashions the
interior of bowl. The mould is provided with a guide for the plunger immediately
over the cavity in which the bowl is formed. When the mould is charged with
clay and the plunger descends, the superfluous clay is expelled and escapes between
the top of the bowl cavity and the guide; it is then cut off around the mouth of
bowl. This arrangement works well when moulding clay which requires but little
pressure.
The
The object of my invention however is to adapt such moulds to the use of
materials which require a much greater pressure to fashion and consolidated. This
I do by providing a wedge or filling piece in one or more filling pieces which fits
into the space between the plunger guide and the bowl cavity of the mould.
plunger descends through a hole in the filling piece into the bowl cavity and the
material in the mould exposed to great pressure as it is able to escape only at
the further end of the mould or by any minute crevice which may be left by
imperfect closing.

page_text: When the moulding is complete the plunger is withdrawn, the wedge or filling
piece is removed and the mould is opened.
In order that my invention may be more clearly understood I proceed to
describe drawings annexed.
Fig. 1 shows one half A of the mould with half of wedge and plunger in it.
Fig. 2 shows the other half B of the mould, and the mould closed, with wedge
and plunger in it.
Fig. 3 shows plan of wedge D with the hole in it through which the plunger
passes.
E is the plunger. The circles 1 on drawing Fig. 1 are holes into which pins on
the other half mould enter and keep the two halves of mould in their exact relative
positions. The part of drawing Fig. 1, covered by lines shows the bowl and stem,
and the narrow passage from stem to end of mould is to admit the wire which
forms the passage for the smoke through the stem.
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
The exclusive right to make or use a mould for the manufacture of tobacco pipes
which, at the time of moulding a pipe, is closed at the mouth of bowl cavity to
prevent, or nearly prevent, the escape of material at the top of mould, such mould
being combined with the plunger shown in drawings, both substantially as
described.
Dated this Twenty-fifth day of February 1893.
WILLIAM WHITE,
201, St. John's Hill, New Wandsworth, London.