An Improved Mould for Making by Jigger and Jolly Clay Goods, such as Plates, Saucers, and similar Articles having an Irregular Shaped Rim or Edge.
Year: 1896

page_text: Date of Application, 7th Dec.. 1896
Complete Specification Left, 2nd Mar., 1897 -Accepted, 22nd May, 1897
PROVISIONAL SPECIFICATION.
An Improved Mould for Making by Jigger and Jolly Clay Goods, such
as Plates, Saucers, and similar Articles having an Irregular
Shaped Rim or Edge.
EDWIN WOOLLAM, 11, Morley Street, Tunstall, Stoke-on-Trent, Staffordshire,
Potter's Manager, do hereby declare the nature of this invention to be as
follows:-
An improved mould for making by jigger and jolly, clay goods, such as plates,
saucers, and similar articles having an irregular or broken outline or edge namely,
the welt" or outer edge of the mould is treated in two distinct ways, as
follows:-
That portion of the "welt" nearest the outline or edge of the article to be
produced from the mould, is cut away, at the same time following the design or
outline of the article to be produced. The remaining portion of "welt" or spare
edge of the mould is turned perfectly true thus enabling the operator to remove
the spare clay or "scrap" in the usual manner up to that portion which is cut
away or broken in outline.
Dated this Fifth day of December 1896.
An Improved Mould for Making by Jigger and Jolly Clay Goods, such
as Plates, Saucers, and similar Articles having an Irregular
Shaped Rim or Edge.
I, EDWIN WOOLLAM, of 11, Morley Street, Tunstall, Stoke-on-Trent, in the
County of Stafford, 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 an improved mould for making by jigger and jolly,
clay goods, such as plates, saucers, and similar articles, having an irregular
shaped rim or edge that is to say of varied outline or form as distinct from that
of a figure of rotation.

page_text: According to this invention the mould is so formed as to enable the operator
to remove a certain portion of scrap or spare clay in the manner hereinafter
explained, the mould being made with an annular recess and with a circum-
ferential portion which is circular, the latter facilitating the removal of scrap
or waste clay from the mould when it is in use on the jigger and the subsequent
obtainment of a clean and well-defined outline upon the article moulded.
The accompanying drawing is a perspective view of one half of an improved
mould in section upon a diametral plane, perpendicular to chat in which the
mould lies. The mould is adapted to rotate, when in use, about a vertical axis
indicated in the drawing by the chain line X Y.
A is the mould body, which in the present example is recessed to form a matrix
proper A', of the usual kind for one face of a plate B, that is to say the face which
would be the upper face of a plate in use; but, which with the plate in the position
in which it is now shown, is the lower face. The plate shown, and the mould
cavity in which it is received are scalloped as at B', but it is to be understood that
the invention is equally applicable to moulds wherein the edge of the article is
of other shape or outline.
C is a "profile" or scraper, of a well-known kind which determines the form of
the bottom of the plate (that is to say, the portion of the plate which is upper-
most in the view shown in the drawings), and is adapted to be secured upon a
"jolly" by which its position relatively to the mould is adjustable in a manner
well understood by those skilled in the art.
The important features of the mould are the circular portion A2 bounding its
circumference and the annular recess A", between the portion A and the edge of
the recess A or matrix proper of the mould body. With a profile C of some
such outline, as is indicated in the drawing, all the scrap or spare clay beyond the
portion A3, can be removed from the mould while the latter is rotating at high
speed about the axis X Y on the customary jigger-head; moreover the annular
recess A³ is of such form in cross-section that its maximum depth (which in the
present example varies) exists between the circular boundary Aª and the matrix
or cavity A', and decreases as the edge of that cavity is approached, so that a
profile or scraper, such as C, whilst scraping off the superfluous clay from above
the matrix, leaves a ring B2 of clay in the annular recess A3 which is joined to the
clay of the moulded article by a very thin connection as indicated at B in
the portion of the plate B seen in section in the drawing. In the drawing the
profile C is shown in the position it occupies relatively to the mould during this
scraping operation and it will be seen therefrom that the mould surface is so
formed as to ensure that the profile, when at work, shall bear entirely upon the
soft and plastic clay and not upon the circumference of the hard mould body A
or upon the clay set hard upon it; consequently the excessive wear and tear of
profiles common with earlier types of mould is avoided, and the operator can
complete successive articles at greater speed than has hitherto been practicable.
After the formation of the moulded article and of the attached ring B is
completed in the manner described, they are carried upon the mould A into a
drying stove or elsewhere to undergo the process of drying; during this process
the clay in the matrix proper A shrinks or contracts away from the ring B.
breaking through at the thinnest part B, that is to say just where it joins the
portion of the moulded article B retained in the matrix proper A', leaving the
moulded article with clean edges ready for the finisher. The annulus of scrap
remaining in the annular recess A", can there after very readily be removed.
Having now particularly described and ascertained the nature of this invention.
and in what manner the same is to be performed, I declare that what I claim is:-
1. In the manufacture of plates saucers and similar articles having irregular
shaped rims or edges the use of a potter's mould so shaped that the profile can
work entirely on the soft clay instead of as hitherto upon the outer circumference
of the mould or upon the clay set hard upon it, substantially as described,

page_text: 2. In a potter's mould the combination with the matrix A' of varied outline
of an annular recess such as A3 substantially as described.
3. In a potter's mould with matrix A¹ of varied outline the combination of
circular circumferential portion such as A3 and annular recess such as A³ sub-
stantially as described.
EDWIN
WOOLLAM.
Boult & Wade,
Agents for the Applicant.