Year: 1885

page_text: We JAMES ARTHUR DRAKE and RICHARD MUIRHEAD both of Maidstone in the
County of Kent, Mechanical Engineers, do hereby declare the nature of this
invention to be as follows:-
:-
This invention relates mainly to the employment as a filtering medium in a
Filter Press of sand or an equivalent material having an adhesive property
amongst its own. particles such as Founders, Coring, or Moulders sand either alone
or in combination with other ingredients or sone chemical agent as a coating or
surfacing to rope, coir, bass, or other fibrous body woven, twisted, laid, or otherwise
prepared either in strand, mat, or other form, which coating or surfacing of sand
may be covered by a fibrous material or left exposed. Several of such combi-
nations of sand, or its equivalent and fibrous material may be arranged to each of
the plates or partitions of a Filter Press.
The sand or its equivalent material as a coating or surfacing, acts in conjunction
with the fibrous or backing material as a filtering medium; said sand not only
being on the surface but within the pores, flutings, corrugations, meshes, or
insterstices as well as within the fibrous body and may be wetted or otherwise
prepared for the reception of the sand, or the sand may be wetted before or during
application.
H. GARDNER,
Agent for the said J. A. Drake
and R. Muirhead.

page_text: We JAMES ARTHUR DRAKE and RICHARD MUIRHEAD both of Maidstone in the
County of Kent, Mechanical Engineers, do hereby declare the nature of our 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 mainly to the employment, as a filtering medium in a
Filter Press, of sand, burnt and ground clay, pulverized brick, powdered charcoal
or an equivalent material having an adhesive property amongst its own particles
when wetted or damped, such as Founders, Coring or Moulders sand either alone
or in combination with any of the above or with other ingredient or ingredients or
some chemical agent as a coating or surfacing to coir, bass or other like fibrous
body woven, twisted, laid or otherwise prepared either in rope, strand, mat or
other form such as is described in our previous Patent dated 27th August 1885,
N° 10,143 which coating or surfacing may be covered by a fibrous material or left
exposed.
Several of such combinations of sand or its equivalent and fibrous material may
be arranged in layers to each side of the plates, diaphragms or partitions of a
Filter Press.
The sand or its equivalent material as a coating or surfacing acts in conjunction
with the fibrous material as a filtering medium, said sand or other material in
fine division or particles not being on the surface only but within the pores,
flutings corrugations, meshes or interstices as well as within the fibrous body
itself, which fibrous body may be wetted or otherwise prepared for the reception
of the sand.
The sand or other like material which may be porous or rendered porous may be
smeared, on and rubbed into, the fibre by the hand, or beaten into it, so as to be
thoroughly incorporated therewith and if necessary further coated aud should the
plates, diaphragms or the fibrous body not have sufficient holding power to retain
the sand or other material, the plates inay be coated with tar, pitch or other sticky
substance such as Dr Angus Smiths solution on which the sand or its equivalent
may be sprinkled or the plates may be perforated or scored or provided with
projections or otherwise prepared for supporting the sand or other material.

page_text: 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
The employment or application of sand or other like material, alone or in
combination with a chemical agent, on, to, and in a fibrous body as a filtering
medium for filter presses also the treatment or preparation of the plates or
diaphragms of filter presses for the reception of said sand or its equivalent, all as
herein described for the purpose set forth.