Improvements in Filter Presses for Use under High Pressures.
Year: 1886

page_text: Date of Application, 17th May, 1886.
Complete Left, 17th Feb., 1887.
Complete Accepted, 18th Mar., 1887.
RESERV
[Communicated from abroad by ALBERT LOUIS GEORG DEHNE, Machine Manu-
facturer, of Halle on the Saal, in the Kingdom of Prussia, German Empire.]
facturer, of Fame on the Satu, in the xingdom of 1 russia; mampire]
Improvements in Filter Presses for Use under High Pressures.
I HENRY EDWARD NEWTON of the Office for Patents & Bream's Buildings Chancery
Lane in the County of Middlesex Civil Engineer do hereby declare the nature of this
invention to be as follows:-
In order to treat substances in a Filter Press under such high pressure, as is usually
exerted in hydraulic presses only, the plates or press boards of a filter press are
arranged in the following manner :-
The filter press frame may be constructed in the usual manner, the press boards,
which may be round or square, are provided near the edges, on their faces, with a slot,
which may extend all around the surface. Into this slot a U shaped packing is
inserted, which may be made of leather, caoutchouc, or any suitable material, and
which packing will take up the internal pressure of the press. If a board is provided
on both sides with such leather packing of U shape, the adjacent boards may be.
without. The packing, if the press boards are not screwed tightly together, may
protrude a little beyond the surface of the board or plate, so that a tightening of the
filter press chamber is effected at once if the plates or boards are screwed fogether,
and before any internal pressure within the press is exerted.
In order to facilitate and insure such tightening, and at the same time to insure
the opening of the packing to receive internal pressure, the outer edge or side of the
packing may be made straight, instead of being rounded off, as the inner edge or side.
The surfaces of the press boards or plates are ribbed as finely as possible to be made
in casting them upon these fine ribs a strong and perforated sheet of iron or other
metal is placed, and this sheet is covered by a fine but strong wire or sieve. This wire
or sieve serves as a support for the filter cloth, which may be secured in position in a
slot surrounding the ribbed surface and into which the rim or edge of the cloth is
inserted, and is kept therein by means of cords or rods, or by tubes or strips of metal.

page_text: COMPLETE SPECIFICATION.
Improvements in Filter Presses for Use under High Pressures.
I, HENRY EDWARD NEWTON of the Office for Patents, 6 Bream's Buildings,
Chancery Lane in the County of Middlesex, Civil Engineer 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 :-
The object of this invention is so to arrange the plates of filter presses that they may
be used under high pressures, such, for instance, as an equivalent to that which can
usually only be exerted by a hydraulic press, and the invention consists in the
application to the filter plates, press boards, or slabs, of a suitable packing and other
means which will permit of the said object being attained.
In the accompanying Drawings, Fig. 1 shows in side elevation, and Fig. 2 in end
view, a filter press of the usual construction. Fig 3 is a front view and Fig. 4 a
vertical section of a filter plate of the improved construction.
In carrying out this invention, the filter press will be of the ordinary construction,
the plates being round, square, or any other suitable or desired shape, and tightened
up by a screw.
The plates, boards or slabs are provided near the edges, and on both sides, with a
groove, which may extend all around the surface. Into this groove a packing a, U-shaped
in cross section, is inserted, which packing may be made of leather, caoutchouc, or
any suitable material, and will take up the internal pressure of the press.
If a plate
is provided on both sides with such packing of U-shaped section, the faces of the
adjacent plates may be without packing. The packing may protrude a little beyond
the surface of the plate, and by reason of its formation, will form a tight joint, even if
the plates be not screwed up tight, as the packing will be expanded by pressure of the
fluid or semifluid under treatment.
In order to facilitate and ensure such tightening, and at the same time to ensure the
opening of the packing, to receive internal pressure, the outer edge or side of the
packing a may be made straight, instead of being rounded off as the inner edge
or side.
The surfaces of the plates are ribbed as finely as possible (such ribs to be made in
casting them), and upon these fine ribs c, a strong perforated sheet of iron or other
metal d is placed. This sheet is covered by a sheet of fine, but strong wire gauze e,
which serves as a support for the filter cloth, which is secured in position in a groove
surrounding the ribbed surface. Into this groove, the rim or edge of the cloth f

page_text: is inserted, and is kept therein by means of cords or rods, or by tubes or strips of
metal.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, as communicated to me by my
foreign correspondent, I declare that what I claim is :-
1. In filter presses for high pressure, the means for making a tight joint betwen two
press plates, boards, or slabs, and consisting of a U-shaped packing, which is inserted in
a groove formed all round the faces of the said plates, boards, or slabs, near the edges
thereof, and which protrudes slightly above the plate surface, substantially as
described.
2. The combination with the finely ribbed filter plates, of sheets of perforated metal
and wire gauze to support the filter cloth, substantially as described.
NEWTON & SON,
Agents for the Applicant.