Improvements in or in connection with Press Cloths for Use in the Preparation or Treatment of Pottery Clay.
Year: 1898

page_text: Improvements in or in connection with Press Cloths for Use in the
Preparation or Treatment of Pottery Clay., .1f'
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We, CHARLES TOWNSEND HILL, of 257, County Road, Liverpool, in the County of
Lancaster, Dentist, and FRANCIS WALTER WILLIAMS, of 33, Church. Road, West,
Liverpool, aforesaid, Press Cloth Manufacturer, do hereby declare the nature of this
invention to be as follows:-
Hitherto the press cloths which have been used in the preparation or treatment
of pottery clay have been provided with a nozzle through which the water compressed
out of the clay finds an exit. The cloth is very apt, even though it is strengthened
with two or more thicknesses of cloth or canvas at that part, to wear away round the
hard metallic nozzle flange, rendering the cloth useless until repaired.
.
Now the present invention is designed to avoid this defect and provide a press
cloth which will not wear away at the part indicated. This we effect by providing a
flanged sleeve made of rubber, or of rubber and canvas, or other suitable flexible
material, the sleeve being passed through the nozzle hole in the press cloth so as to
project through the hole, and a washer then placed on the projecting end. The
sleeve flange therefore abuts against one face of the cloth and the washer against
the other, and these are cemented or solutioned to the press cloth so that they
cannot separate, or they may be rivetted or otherwise secured together. The nozzle
can then be passed through the hole in the sleeve and secured. The nature of the
sleeve together with the flange and washer which are preferably of larger diameter
than the inside flange, secures flexibility, while providing a resilient foundation at
the part where the press cloth is most vulnerable to wear, while ensuring that the
press cloth will not be torn or cut through by the hard metallic edges of the
nozzle.
Improvements in or in connection with Press Cloths for Use in the
Preparation or Treatment of Pottery Clay.
657
We, CHARLES TOWNSEND HILL, of 257, County Road, Liverpool, in the County
of Lancaster, Dentist, and FRANCIS WALTER WILLIAMS, of 33, Church Road
West, Liverpool, Press Cloth Manufacturer, do hereby declare the nature of this
..

page_text: 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 earthenware and china, the prepared clay or slip is mixed
with water and introduced into and treated by pressure in a clay press, by which.
pressure it is deprived of the greater part of its water and made ready for
treatment in the pugging mill. The clay or slip before being placed in this press
is enclosed in portions in folded press cloths, each of which latter are provided
with a nozzle through which the superfluous water compressed or squeezed out of
the clay finds an exit. These cloths are very apt, even though they are
strengthened at the nozzle with two or more thicknesses of cloth or canvas, to
wear away around the hard metallic nozzle flange, rendering the cloth useless until
repaired.
Now the present invention is designed to avoid this defect and to provide a press
cloth complete with nozzle which will not so easily wear away at the part indicated.
This we effect by providing a flanged sleeve or washer made of rubber, or of rubber
and canvas or other suitable flexible material, the flanged sleeve being passed
through a nozzle hole in the press cloth, so as to project through the hole and a
washer then placed on the projecting end.
The invention will be understood from the following description, reference
being had to the accompanying drawing, in which,
Figure 1 is a cross sectional view showing how the nozzle is secured to a press
cloth according to our invention;
Figure 2 a plan;
Figure 3 a detail view.
In these figures A is the press cloth, B the auxiliary thicknesses of canvas round
the nozzle hole, C the nozzle having a metallic flange D and screwed neck E which
passes through a hole in the press cloth, F the flanged sleeve made of rubber, or of
rubber and canvas or other suitable flexible material, the flange of which is of
larger diameter than the metallic flange D of the nozzle. The sleeve F is passed
through a nozzle hole in the press cloth so as to project through the hole, and a
rubber washer G then placed on the projecting end. The flange of the sleeve F
therefore abuts against one face of the cloth (or rather against one of the auxiliary
thicknesses B) and the washer G against the other, and these are cemented or
solutioned to the press cloth so that they cannot separate, or they may be rivetted
or otherwise secured thereto. The screwed neck of the nozzle can then be passed
through the hole in the sleeve and secured by a metallic washer H. The nature
of the sleeve together with the flange and washer, (which latter is, same as the
flange of larger diameter than the metallic washer), secures flexibility while
providing a resilient foundation at that part where the press cloth is most vulnerable
to wear, and ensures that the press cloth will not be torn or cut through by the
hard metallic edges of the nozzle.
It is obvious that the canvas and rubber may be made separate if desired, the
canvas washers I being made of somewhat larger diameter than the rubber F and G
as shown, and the two cemented together so that they cannot separate, and also
cemented to the press cloth, the edge of the canvas washers being stitched to the
press cloth by stitches J. Instead of rubber other suitable flexible or resilient
inaterial may be used, which will provide a resilient foundation for the hard
metallic flange and washer of the nozzle. Furthermore the flange of the sleeve,
and the washer might be made all in a piece and sprung into the hole in the press
cloth, instead of being made separate, thus constituting a double flanged
sleeve.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:
1. In potters' press cloths having a nozzle through which the superfluous water
compressed or squeezed out of the clay finds an èxit. providing the nozzle hole in

page_text: the press cloth on one or both sides with a resilient flange or washer of somewhat
larger diameter than the hard metallic flange and washer of the nozzle, whereby a
protection is secured against the press cloth being torn or cut through by the hard
metallic washer and flange.
2. The combination with a potter's press cloth that is provided with a metallic
flanged nozzle through which the superfluous water, compressed or squeezed out of
the clay finds an exit, of a flanged sleeve F and washer G (or a double flanged
sleeve) made of rubber and canvas or other suitable material adapted to abut
against opposite faces of the cloth and constitute a protection against the hard
metallic flange and washer of the nozzle coming into contact with the press cloth,
substantially as described.
3. In potters' pross cloths, the device taken as a whole for preventing the cloth
being torn or cut by the hard metallic flange of the nozzle, substantially as set
forth.
WM. P. THOMPSON & Co.,
Patent Agents, of Liverpool, Manchester, Birmingham, and London.