IMPROVEMENTS IN. CLAY PRESS TRAYS
Year: 1882

page_text: LETTERS PATENT to John Brindley of Burslem in the County of Stafford
Timber Merchant for an Invention of " IMPROVEMENTS IN. CLAY PRESS
TRAYS
"
PROVISIONAL SPECIFICATION left by the said John Brindley at the
Office of the Commissioners of Patents on the 14th July 1882.
.
JOHN BRINDLEY of Burslem in the County of Stafford, Timber Merchant,
" IMPROVEMENTS IN CLAY PRESS TRAYS
"
This relates to trays for use in presses in which moisture is filtered or separated
from finely divided clay particles through cloths or equivalent appliances resting
against and supported by the said trays. The main objects are to so construct the
said trays that they are stronger, more durable, more easily cleaned, readily repaired
when worn or otherwise damaged, and give more even and better support to the
filter cloths, thereby increasing their durability.
Under the first part. I construct clay press trays of fluted boards or sides fitted
with top and bottom grooved strengthening or binding pieces.
Under the second part I connect the top and bottom binding or strengthening
pieces above mentioned by means of tie rods or equivalent devices.
Under the third part. I construct clay press trays with plates or bearers through
which the feed tubes or pipes are passed and secured in position; by feed tubes or
pipes I mean the ways through which the slip to be filtered is fed to the trays.
These plates or bearers give increased strength, cause the taps to last longer and
augment the lives of the trays.
Under the fourth part. I combine with any or all of the above described
improvements boards or sides of clay press trays with equally curved concave
grooves and convex ribs to give superior supporting surface to the filter cloths and
at the same time allow of the moisture flowing freely away.
Under the fifth part. I construct clay press trays with the several parts
herein before setforth in combination.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Brindley in the Great Seal Patent Office on the 13th January
1883.
JOHN BRINDLEY of Burslem in the County of Stafford, Timber Merchant,
"IMPROVEMENTS IN CLAY PRESS TRAYS
"
This relates to trays for use in presses in which moisture is filtered or separated
from finely divided clay particles through cloths or equivalent appliances resting
against and supported by the said trays. The main objects are to so construct the
said trays that they are stronger more durable, more easily cleaned, readily repaired
when worn or otherwise damaged and give more even and better support to the
filter cloths thereby increasing their durability.
"
Under the first part. I construct clay press trays of fluted boards or sides fitted
with top and bottom grooved strengthening or binding pieces.
Under the second part. I connect the top and bottom binding or strengthening
pieces above mentioned by means of tie rods or equivalent devices.
Under the third part. I construct clay press trays with plates or bearers through
which the feed tubes or pipes are passed and secured in position, by feed tubes or
pipes I mean the ways through which the slip to be filtered is fed to the trays.
These plates or bearers give increased strength, cause the taps to last longer and
augment the lives of the trays.
Under the fourth part. I combine with any or all of the above described
improvements boards or sides of clay press trays with equally curved concave
grooves and convex ribs to give superior supporting surface to the filter cloths and
at the same time allow of the moisture flowing freely away.
Under the fifth part I construct clay press trays with the several parts
herein before setforth in combination.
a
Fig 1 is a perspective view fig 2 a horizontal section, and fig 3 a vertical section
of a clay press tray constructed under my invention and embodying the several
heads thereof.
a fluted boards or sides fitted with grooved top and bottom strengthening
pieces b. o tie roda, d plates or bearers with recesses e through which the feed
tubes or pipes pass. f filter cloth The boards or sides are made with equally
curved concave grooves and convex ribs, see fig 2.
The trays are used in any ordinary tray press in the usual manner
Having now described and illustrated the nature of the said invention in
such manner that others will be enabled to carry my improvements into effect
I claim :-
First. Clay press trays constructed of fluted boards or sides fitted with top and
bottom grooved strengthening or binding pieces.
Second. The combination in clay press trays of fluted boards or sides grooved
top and bottom strengthening or binding pieces and tie rods substantially as set-
forth.
Third. Clay press trays constructed with plates or bearers d having recesses e
for the purpose setforth.
Fourth. In combination with clay press trays constructed substantially as set-
forth under all or any of the first three heads boards or sides with equally curved

page_text: concave grooves and convex ribs or projections substantially as and for the purpose
setforth.
Fifth. The combination in clay press trays of the first four parts substantially
as described and illustrated.
In Witness Whereof I the said John Brindley have hereunto set my hand
and seal this ninth day of January in the year of Our Lord one thousand
eight hundred and eighty three.