Af various Articles of Pottery having Straight Parallel Sides.
Year: 1886

page_text: Af various Articles of Pottery
having Straight Parallel Sides.
I, WILLIAM BOULTON, of Providence Foundry, Burslem, in the County of
Stafford, Engineer, do hereby declare the nature of the said 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 paste boxes, jam
pots, pots for shrimps, and potted meats or preserved articles, or other similar
articles of a round, square or other required shape having straight parallel sides or
outer sides; and consists in manufacturing such articles from plastic clay or other
suitable plastic material by the use of a metallic press mould constructed and
applied substantially in the manner hereinafter described.
In carrying the Invention into effect, I adapt the press with inner, upper and
outer metallic moulds substantially in the manner illustrated on the accompanying
drawings; in which Figure, 1, represents a side view, Figures, 2, and, 3, sectional
elevations, and Figure, 4, a plan view, of press moulds constructed in accordance
with the present improvements.
The acting faces of the said moulds are formed in accordance with the con-
formation of the parts they are respectively required to shape, and the moulds are
so combined and applied as that during the process of pressing the clay or other
plastic material and forming the said articles by pressure exerted by the descending
upper mould, the other moulds enclose the said clay or material, but allow of the
exudation of the superfluous portion thereof, and as that after the said process of
formation and rise of the pressing mould, one of the other moulds can be so
operated on as to fall clear of the formed article, which is left supported upon the
remaining mould and can then be removed therefrom.
The top mould, 1, is attached to a screw or other suitable press so as to permit
of its being raised sufficiently above the outer mould, 2, to permit of the latter
mould being filled with the plastic material, when the latter inould occupies such
a position in relation to the inner mould, 3, as is represented on the accompanying
drawings. When the moulds, 2, 3, are thus disposed, and the plastic material is
inserted into the mould, 2, above the mould, 3, as aforesaid, the mould, 1, is pressed
down until it comes in contact with the mould, 2, and the superfluous clay is
forced out between the edges of the moulds, 1, 2, as the mould, 1, is descending.

page_text: During such process of pressing the plastic material and forming the said
articles, the mould, 2, is supported in its required position in relation to the
mould, 3, upon projecting parts, 4, of a ring, 5, which encircles the mould, 3, and is
adapted with a handle or equivalent means, 6, of turning it about the mould, 3, in
such a manner as that when required the said supporting projections, 4, can be
brought opposite corresponding shaped recesses, 7, in the bottom edge of the
mould, 2, and this is effected when the said process of forming the article is
completed, and the mould, 1, is raised; and when effected, the mould, 2, can be
lowered from the formed article, 8, about the mould, 3, by the operation of a
counterbalanced lever, 9, on projecting stud pins, 10, effected by depressing a
connected foot-pedal, 11, which leaves the formed article supported upon the
mould, 3, from which it can be removed.
The lids or covers of such articles are formed in a similar way.
If it is wished to make the articles with outer grooves for securing string or for
other purposes adjacent to the top edge, sectional metal plates, 12, are introduced
through the sides of the mould, 2, and suitably secured in position until the clay is
pressed and the article formed, when such plates are withdrawn before lowering
the mould, 2, as herein before referred to.
If it is wished that the lids or covers should screw on and off or be otherwise
equivalently applied to the article, I form the mould, 2, or the mould, 3, with screw
threads or equivalent inclined parts of the formation required, and unscrew the
formed article from the mould, which impresses and finishes the formation of the
thread or inclined part in the clay as it leaves the mould.
If it is required that the clay should be specially consolidated at the edge, 13, of
the article, the mould, 3, may be surrounded by a ring, 14, and I so adapt the
parts in any suitable manner, as that the mould, 1, may be caused to depress the
moulds, 2, and, 3, together to a small extent, leaving the ring, 14, stationary, and
so more densely compress the plastic material at the required parts.
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 pots, boxes and other similar articles of the nature
herein before referred to having straight parallel sides, from plastic clay or other
suitable plastic material, by the use of a metallic press moulding apparatus
constructed, applied and operating substantially in the manner hereinbefore
described.
2. The application to and use with such apparatus of means for forming and
finishing grooves, or screw threads or equivalent inclined parts, adjacent to the
open ends of the articles made, substantially in the manner herein before described.
3. The application to and use with such apparatus of means for consolidating the
open ends of the articles made substantially in the manner hereinbefore described.
Dated this 6th day of November 1886
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicant.