Year: 1887

page_text: Date of Application, 9th Nov., 1887
Complete Specification- Left,- 9th Aug,-1888
Complete Specification Accepted; 14th Sept., 1888
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 to be as follows :-
The object of this invention is to produce a simple and compact apparatus for
filtering turbid and muddy liquids, especially beetroot juice, and solutions of sugar,
in the manufacture of sugar, which apparatus will afford a large filtering surface in a
comparatively small space.
The filter consists of a hermetically closed vessel of any convenient form, and provided
with suitable inlet and exit pipes. This vessel is intended to contain a number of
filtering plates formed of corrugated sheet metal plates secured at top in tubes, and
wrapped in a filtering cloth, which at the bottom and both sides is sowed together, so
as to form a bag, but at the top of the filtering body, is wound round the tube, and
held by clamps.
The filtering plates are held in position by inserting one end of each tube into a
hole in the wall of the vessel, a tight joint being made by an india rubber ring, and
supporting the opposite closed end of the tube on centres or otherwise.
When the
requisite number of plates is in position, a cover provided with a counterweight is
closed, and made tight by an india rubber ring and screw nuts. The liquid to be
filtered is admitted through a junction at the bottom of the vessel, passes through the
filtering cloth, and up the channels formed by the corrugations in the plate, into the
tubes, from which it escapes to the exit pipe at the top of the vessel.
.:
In some cases, for example, in filters designed for Sugar Works, for purifying the
thin juice after the third saturation with an occasional slight addition of lime, it is
preferred to make the bottom of the vessel trough shaped, and in the bottom of this
trough is arranged a feed screw by which the mud detached from the filtering plates
may from time to time be removed through a pipe suitably placed for the purpose.
Dated this 9th day of November 1887.

page_text: Improvements in Filter Presses.
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 to produce a simple and compact apparatus for
filtering turbid and muddy liquids, especially beet-root juice and solutions of sugar,
in the manufacture of sugar, which apparatus will afford a large filtering surface in a
comparatively small compass.
The filter consists of a hermetically closed vessel of any convenient form, and
provided with suitable inlet and exit pipes. This vessel is intended to contain a
number of filtering plates formed of corrugated sheet metal plates secured at top in
tubes and wrapped in a filtering cloth, which, at the bottom, and both sides, is sewed
together, so as to form a bag, but at the top of the filtering body, is wound round or
lapped over the tube, and held by clamps.
The filtering plates are held in position by inserting one end of each tube into a
hole in the wall of the vessel, a tight joint being made by an india rubber ring, and
supporting the opposite closed end of the tube on centres or otherwise.
When the
requisite number of plates is in position, a cover provided with a counterweight is
closed, and made tight by an india rubber ring and screw nuts. The liquid to be
filtered is admitted through a junction at the bottom of the vessel, passes through the
filtering cloth, and up the channels formed by the corrugations in the plate, into
the tubes, from which it escapes to the exit pipe at the top of the vessel.
In some cases, for example, in filters designed for sugar works, for purifying the
thin juice after the third saturation with an occasional slight addition of lime, it is
preferred to make the bottom of the vessel trough shaped, and in the bottom of this
trough is arranged a feed screw, by which the mud detached from the filtering plates
may from time to time be removed through a pipe suitably placed for the purpose.
In Figs. 1 to 4 of the accompanying drawings, a filter press embodying the present
improvements is shown, such filter press being more particularly designed for filtering
thick juices in sugar works. It consists of a hermetically closed vessel containing,
according to its size, a larger or smaller number of filtering bodies. These filtering
bodies A A' consist of finely corrugated tinned sheet iron plates, or plates of any other
suitable material.
The corrugations in the plates are arranged vertically, and the size of the plates
preferred is about one hundred square inches more or less.
In order to increase the rigidity of the filter plates, we secure to three edges of each
of the same, a metal band or strip B, of U-shaped or other cross section. The top or
fourth edge of each filter plate is inserted into a longitudinal slot provided in a
tube CD, and is secured in such tube by any suitable means.
This tube is provided with a shoulder E, designed to support a suitable packing
ring e.

page_text: The tubes CD, carrying the filter plates, are inserted into holes provided in the
front wall W of the vessel. At the other closed end, each of these tubes is supported
by a screw F, serving also to tighten the joint between the tube and the wall W. Each
filtering plate is wrapped in a bag of filtering cloth as before stated, and closed at its
upper end by being lapped over the tube, and secured by a clamp e¹. The juice or liquid
to be filtered is admitted into the vessel by the junction pipe G, provided with a
suitable device for regulating or entirely cutting off the inflow of the liquid. The
corrugations of the filter plates forming vertical grooves as above stated, which com-
municate with the tubes CD through the longitudinal slots in the same, the liquid
entering at G passes through the filter cloth into the tubes CD, being thereby purified,
and thence flows into the trough or channel H.
The tubes CD are provided with caps or plugs of any suitable construction, to
enable the attendant to put out of action any faulty tubes, which yield turbid liquids,
if it is not preferred to replace the same by others, which may be done with very little
loss of time.
The deposited mud is removed through a junction pipe J provided with a suitable
cut-off, and the whole filter is cleansed by water admitted through a junction pipe K,
the inflow of water being regulated by suitable devices.
In the filtering apparatus shown in Figs. 5 and 6, which is particularly designed
for filtering "thin juices" in sugar works, the construction of the vessel and of the
filtering bodies is the same as in the filter press previously described, except that the
liquid to be filtered is admitted into the vessel by means of two tubes L L', perforated
at the lower half of their circumferences, in order to cause the liquid to enter quietly
& uniformly into the filtering bodies.
The inlet junction G is provided with two lateral junctions M. M' for water and
steam for cleaning the tubes L L', the filtering bodies, and the vessel, after each
charge as quickly as possible. Instead of screws, bolts N are employed, in this case,
for holding in place the filtering bodies, spiral springs strung on the said bolts N
serving to produce the required pressure, and the whole thus being capable of quicker
handling. For cleaning the filter cloth bags, water containing a suitable percentage of
soda is employed.
The admission of the liquid to be filtered, the water, and the steam, is controlled by
suitable cut-offs. In order to more easily remove the mud profusely deposited in
treating thin juices in sugar works, a feed screw T is provided at the bottom of the
vessel, which is actuated by a crank or any other suitable gear, and by which the mud
is moved on to the junction or exit passage J provided with a cut off. To facilitate
the deposition of mud on a central line at the bottom of the vessel, the side walls of
the vessel are inclined towards the feed screw.
The advantages of this filter press for mechanically filtering juices and other turbid
or muddy liquids, are the following:
1. The whole mechanism is very simple, requires very little space, and yields a
considerable filtering surface in a comparatively small volume.
2. It provides for the regulation of the admission to the apparatus of water, steam,
and material to be filtered, and thereby ensures an exact control of the clearness of
the filtered juices or liquids, and anyone of the filtering bodies (if the liquid filtered
through it should not be quite clear) may be at once removed and replaced by a fresh
one, without disturbing the further filtration and without loss of juice.
3. The filter press is constructed so as to prevent any leakage in the filtering bodies
or the vessel.
4. By coating the walls of the vessel with a nonconducting material, the cooling
of the juices or liquids may be reduced to a minimum. By heating the vessel by
steam admitted into a steam jacket, or by directly heating the liquid by steam, the
desired temperature may be maintained in the liquid.
5. A longer filtering period and a greater economy in filter cloth is obtained than
with the filter presses now in use, because, by the use of corrugated filter plates, almost
the whole surface of the filter plates is active, so that even with small pressures, the
highest possible qualitative and quantative effect is obtained. Moreover, the flow of

page_text: the juices or liquids through the filtering medium is very slow in consequence of
the uniform function of the whole filtering surface and of the low pressure.. By
this,―
(a) very pure filtered juices or liquids are obtained, and
(b) the deposition of the coarser particles of higher specific gravity at the bottom
of the vessel is facilitated, from which from time to time the deposit may be removed,
thus ensuring a longer operation of the filter..
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 thick and thin juices in sugar works and for other liquids,
the filtering bodies consisting of finely corrugated sheet metal plates A A¹ inserted
into tubes D, and wrapped in filtering cloth, substantially as described.
2. The means above described for mounting filtering bodies, consisting of the
shoulder E, ring e, and the screws F or bolts N and spiral springs permitting a quick
replacement of the filtering bodies.
3. The combination of the filtering bodies substantially as described with the filtering
vessel, the trough or channel F, and the inlet and exit pipes, substantially as
described.
4. In combination with the filtering bodies substantially as described, the
distributing pipes L L' and the feed screw T, substantially as and for the purpose
described.