IMPROVEMENTS IN OR RELATING TO APPARATUS FOR MANUFACTURING SAGGARS OR SETTERS SUCH AS ARE USED IN THE BAKING OF PORCELAIN AND STONEWARE
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by Alfred Julius Boult at the Office of
the Commissioners of Patents on the 18th May 1882. A communication to
him from abroad by Gebrüder Heubach, of Lichte near Coburg in the Empire
of Germany
ALFRED JULIUS BOULT, of the firm of W. P. Thompson and Boult, Agents for
Foreign Patent Solicitors, of 323 High Holborn, in the County of Middlesex and
6 Lord Street Liverpool, in the County of Lancaster Engineer "IMPROVEMENTS
IN OR RELATING TO APPARATUS FOR MANUFACTURING SAGGARS OR SETTERS SUCH
AS ARE USED IN THE BAKING OF PORCELAIN AND STONEWARE" a communication
to him from abroad by Gebrüder Heubach, of Lichte near Coburg in the Empire
of Germany
This invention has for its object to provide a ready means for quickly and
uniformly manufacturing the saggars or setters of fireclay used for baking porcelain,
stoneware and the like.
An apparatus embodying one part of this invention resembles in its general
appearance the spindle presses ordinarily used for copying writings and for other
purposes.
It consists of an arched or curved frame in which travels a screw spindle having
a fly-wheel or the like at its upper end. The lower ends of the frame are bolted
or otherwise attached to a suitable bed plate as will be readily understood To
the lower end of the screw-spindle is keyed or fastened a bolt having a flat head.
A plate consisting of two parts fits round the said bolt and forms the top or lid of
a hollow piston or plunger the body whereof is formed by a box having upright
sides, a flat bottom and a solid upright centre piece. The piston body is attached
to the top or lid and in its downstroke the centrepiece of the body will take the
pressure from the screw through the bolt.
In the bottom of the piston vent holes are provided opposite to corresponding
apertures in the top suitable spring-bolts are inserted in these apertures to close
both these and the vent holes
The mould in which the saggars or setters are to be formed is constructed as
follows.
To the bed plate of the press a plate, say circular in shape, is attached by a
screw and thumb-nut the screw passing through the bed plate

page_text: The said circular plate forms the bottom of the mould it has a groove or recess
in its periphery into which groove fits a tonge on the inner side of a cylinder of
suitable height which forms the sides of the mould and is formed in halves
connected by a hinge at one side and fastened by a key or cotter arrangement at
the other
At the top of said cylinder and at its outside a groove is provided which
receives a tongue on a ring, also in halves hinged and fastened as above described,
of somewhat smaller internal diameter than the cylinder. Into this ring the piston
fits and it forms the top of the mould, suitable apertures are provided therein for
the escape of any excess material in the mould.
The lid of the piston projects somewhat beyond its sides and this limits the
stroke, but should it be requisite further to reduce it suitable blocks or bearing
pieces are screwed on to the rim of the piston lid.
The thickness of the bottom plate of the mould may also vary so as to vary the
height of the saggar to be produced
The operation is simple sufficient material is placed in the mold, the plunger
forced into the mould by the screw, and the saggar formed.
When the saggar has been pressed, the piston withdrawn and the top and sides
of the mould removed, the pressed article will be pulled off the mould bottom,
say onto a plaster of Paris plate by a strap of curved sheet metal with two
handles