IMPROVEMENTS IN FILTER PRESSES
Year: 1884

page_text: I, HENRY HARRIS LAKE, of the 'firm of Haseltine Lake & Co, Patent Agents,)
Southampton Buildings, in the County of Middlesex do hereby declare the nature.
of my invention; for IMPROVEMENTS IN FILTER PRESSES" to be as follows:-
.
This invention relates to filter presses or apparatus for extracting paraffine or
solid substances from oil or other liquids.
•
11..
Heretofore filter-presses have been composed of a series of cast iron wooden
plates, constructed with the outer rim of the plates considerably thicker than the
web, so that when arranged in the press, with suitable textile material introduced
between the plates to act as a strainer, the rims press tightly together, forming
within the plates, chambers or recesses for the reception of the paraffine or other
solid materials,
My improvement consists in making the plate of wrought iron or other material
that will bend rather than break under pressure, and attaching to it a flexible rim
or flange, and also a number of pads of the same material, between the flange and
the centre-hole of the plate; the purpose of using these pads being to form a series
of intermediate supports and thus materially strengthen the plates.
The advantages of using textile fabrics or other flexible materials for constructing
the flange and central supporting pads are that the said fabrics permit the
necessary thickness for separating the plates without increasing the rigidity of the
plates or adding materially to their weight.
These flexible flanges also allow of the plates fitting closely together, forming a
tight joint when in the press without the expense or trouble incident to the
finishing of cast iron plates.
The plates, for convenience of construction, are made round and are built up of
three thicknesses of wrought iron rivetted together. The central hole is perforated
through all three thicknesses of the plate.
With the exception of this central hole and those necessary for the rivets holding
on the flanges and other parts, the central plate is solid, and is extended on each
side into ears to attach the complete plate to the machine.
The outer plates are perforated with a large number of small holes, the bottoms
of which abut against the central plate.

page_text: The flexible rim is preferably made up of one or more thicknesses of canvas,
ordinary cotton duck answering for this purpose, though any suitable flexible
material may be used.
When more than one thickness of canvas is used, and it is preferable to use,
several thicknesses, these several layers are stitched together, rivetting being
objectionable because interfering with the compressibility of the rim, It is best to
use three or more thicknesses of canvas, the top and bottom layers being extended
further toward the centre of the plate to form a flange below the level of the rest
of the rim for the rivets which secure the rim to the body of the plate. These
rivets pass through both plates, and should have washers under their heads next
the canvas. While I much prefer to rivet the flexible rim to the plate, it may be
either placed loosely between the plates, being held merely by pressure, or it may
be attached to the cloths which are placed between the plates.
The central pads are of the same thickness as the outer rim, and of the same or
similar flexible material, and it is best that they should be composed of the same
number of layers as the outside, as it is important that their compressibility should
be the same as that of the outer rim, in order that the plate may not be strained.
The several layers, are stitched together, a hole is pierced through the centre pad,
and it is rivetted through the plate to the pad on the opposite side. The hole
through the outer layers of the pads is made larger than the rest in order that the
rivet head may sink below the surface, and the contact of the two opposite rivets
be thus prevented.
These pads are made preferably with tapering sides, are smaller at the top than
at the bottom, and are placed so as to come opposite one another.
To form an even bearing surface, at least three pads should be used, but more
can be used; and in very large plates it might be found desirable to use two or
more rows of them.
These pads may also be used in the old style of plate, and the form of plate may
be varied, but I have found the circular form most convenient.
When these pads are used with the old style of plate, it is best to make them of
metal or wood.
The improved plates are introduced and used in a filter press frame in the usual
well known manner,
Dated this 14th dex of Antahan 1001.

page_text: I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake, and Co, Patent Agents,
Southampton Buildings, in the County of Middlesex do hereby declare the nature
of my invention for "IMPROVEMENTS IN FILTER PRESSES 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 to filter presses or apparatus for extracting paraffine or
solid substances from oil or other liquids.
Heretofore filter presses have been composed of a series of cast iron or wooden
plates, constructed with the outer rim of the plates considerably thicker than the
web, so that when arranged in the press with suitable textile material introduced
between the plates to act as a strainer, the rims press tightly together, forming
between the plates, chambers or recesses for the reception of the paraffine or other
solid materials.
My improvement consists in making a plate of wrought iron or other material
that will bend rather than break under pressure, and attaching to it a flexible rim
or flange, and also a number of pads of the same material, between the flange and
the central hole of the plate; the purpose of using these pads being to form a series
of intermediate supports and thus materially strengthen the plate.
The advantages of using textile fabrics or other flexible materials for constructing
the flange and central supporting pads are that the said fabrics permit the necessary
thickness for separating the plates without increasing the rigidity of the plates or
adding materially to their weight.
These flexible flanges also allow of the plates fitting closely together, forming a
tight joint when in the press, without the expense or trouble incident to the
finishing of cast iron plates.
In the accompanying drawing
Figure 1 is a side view of an improved filter plate, and
Figure 2 is a central cross section of the plate.
A. A. are the outer plates of wrought iron forming with the central plate A¹
the web.
B is the centre hole, passing entirely through the plate, and b, b, are the small
holes in the plates-A. A.
C. C, are the pads of flexible material having rivets c for securing them to the
plate, and D, D, are the ears for securing the plate in the press.
E is the flexible rim secured to the web of the plate by the rivets f, f.
The plates for convenience of construction are made round and are built up of
three thicknesses of wrought iron rivetted together. The central hole B is perforated
through all three thicknesses of the plate.
With the exception of this central hole, and those necessary for the rivets holding
on the flanges and other parts, the central plate is solid, and is extended on each
side into ears to attach the complete plate to the machine.

page_text: The outer plates are perforated with a large number of small holes b, the bottoms
of which abut against the central plate.
The flexible rim is preferably made up of one or more thicknesses of canvas,
ordinary cotton duck, answering for this purpose, though any suitable flexible
material may be used.
When more than one thickness of canvas is used, and it is preferable to use
several thicknesses, these several layers are stitched together, rivetting being
objectionable because interfering with the compressibility of the rim. It is best to
use three or more thicknesses of canvas, the top and bottom layers being extended
further toward the centre of the plate to form a flange below the level of the rest
of the rim for the rivets which secure the rim to the body of the plate. These
rivets pass through both plates and should have washers under their heads next the
canvas. While I much prefer to rivet the flexible rin to the plate it may be either
placed loosely between the plates, being held merely by pressure, or it may he
attached to the cloths which are placed between the plates.
The central pads are of the same thickness as the outer rim, and of the same or
similar flexible material, and it is best that they should be composed of the same.
number of layers as the outside, as it is important that their compressibility should
be the same as that of the outer rim, in order that the plate may not be strained.
The several layers are stitched together, a hole is pierced through the centre pad,
and it is rivetted through the plate to the pad on the opposite side. The hole
through the outer layers of the pads is made larger than the rest, in order that the
rivet head may sink below the surface and the contact of the two opposite rivets be.
thus prevented.
These pads are made preferably with tapering sides, are smaller at the top than
at the bottom, and are placed so as to come opposite one another.
To form an even bearing surface at least three pads should be used, but more
can be used, and in very large plates it might be found desirable to use two or
more rows of them. In the drawing six pads are shown.
These pads may also be used in the old style of plate, and the form of the plate
may be varied, but I have found the circular form most convenient.
When these pads are used, as they may be, with the old style of plate, it is best
to make them of metal or wood.
My improved plates are introduced and used in a filter press frame in the usual
well known manner.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
First. A series of filter plates so arranged in a frame that the flexible rings of
such plates coming together, form a tight joint and an inner receptacle between the
webs of the plates for the deposit of the solid substances.
Second. A filter press plate constructed of three or more plates of wrought iron
joined together, the centre plate being solid, and the outer plate pierced by numerous
small holes or openings, substantially as described.
Third. A filter press plate composed of three or more wrought iron plates and an
outer flexible rim, substantially as, and for the purpose, described.
Fourth. The combination of a filter press plate with a flexible outer rim,
substantially as described.
Fifth. A filter press plate, composed of a wrought iron plate, a flexible outer rim,
and a flexible supporting pad arranged within the rim, substantially as described.
Sixth. The combination of a filter press plate with a flexible outer rim and
flexible inner supporting pads or blocks, substantially as, and for the purpose,
described.
•

page_text: Seventh. A filter press composed of a series of filter plates constructed of wrought
iron plates, an outer flexible rim, and inner flexible pads arranged in the press 80
that the flexible rims come together forming a tight joint and an inner receptacle
for the deposit of the solid substances, substantially as, and for the purpose,
described.
T
1000
HASELTINE, LAKE & Co.,
For the Applicant.