An Improved Filter Case.
Year: 1899

page_text: LORE RE
An Improved Filter Case.
I, WILHELM SOMMER, of Furth, near Nuremberg, in the Kingdom of Bavaria
nd Empire of Germany, Master Brewer, do hereby declare the nature of this
nvention and in what manner the same is to be performed, to be particularly
lescribed and ascertained in and by the following statement:-
This invention relates to an improved filter-press that is to say an apparatus
or eliminating solid substances from liquids, this filter-press is composed of a
number of flat chambers carried upon a frame and lined with filtering cloth;
the liquid to be filtered being caused to traverse the said chambers so that
the solid substances contained in the liquid are deposited on the filtering cloth.
In all filter-presses known at the present time the conduit through which the
liquid is conveyed to the chambers is formed by uniform openings provided in
the centre or in one of the upper corners of the plates constituting the chambers
and forced together by a screw spindle, the said conduit being thus located in
the interior of the press. Owing to such arrangement a thorough cleansing of
the feed conduit is very tedious and lengthy or sometimes even impossible, and
presents the further disadvantage that the filtering cloth must be provided with
corresponding openings at the respective places and, in the case of certain con-
structional forms must be properly secured to and tightened against the plates
by means of special screwing devices. For discharging the filtered liquid dis-
charge taps are mostly employed which are connected externally to horizontal
channels provided at the lower part of the plates, and through which the liquid
is discharged into an open tank; these taps likewise do not admit of a thorough
cleansing, while moreover the liquid in the tank is exposed to subsequent con-
tamination.
On the contrary in my improved filter-press, the feed and discharge conduits
are formed by pipes arranged parallel to the longitudinal axis of the press
above and below the latter, respectively, thus permitting of an easy and ready
mounting and dismounting of the same and a thorough cleansing thereof, and
also permitting of a proper cleansing of those parts which connect the interior
of the pipes with the filter chambers. To the said pipes the main feed conduit
and the main discharge conduit are directly connected so that the liquid during
the whole time it is passing to and through the press and from the same to the
place of disposal remains enclosed and thus reaches the latter in as pure a con-
dition as it leaves the press. The filtering cloths are simply hung over the
plates as in the case of the so-called filter frame-presses.
A filter-press of this kind provided with such feed and discharge pipes is
shown in the accompanying drawings in which
Figure 1 represents the press in side elevation,
Figure 2 one of the plates in front elevation with the pipes in cross section,
Figure 3 several plates in plan,
Figure 4 the feed pipe in inverted plan,
Figure 5 the discharge pipe in plan.
As to be seen from Figures 2 and 4 the greater part of the feed pipe b corre
sponding to the whole length of the compressed filter plates a is open at the
bottom and provided with flanges b¹ and has both ends as well as its central part
furnished with a strengthening rib 62 flattened at its top. The two outermost
plates and the intermediate plate are provided at their upper surfaces with two

page_text: is at
pairs of eyes a on which, by the aid of bolts, e a curved piece d
one side permanently but pivotally secured and, at the other side
detachably secured. Each of these curved pieces d is provided with at
handle actúated screw e; these screws serve to exert pressure upon the
ribs of the pipe b thus firmly forcing the latter with its flanges against
corresponding projections a², of the plates a (or against filtering cloth hung over
the latter). Between the flanges and the projections of the filtering cloths
suitable tightening media such for instance as strips of linen covered with india
rubber may of course be arranged. Each plate a moreover has a semicircular
recess a arranged upon both sides of their upper part (Figures 2 and 3) these
recesses forming together with those of the adjacent plates cylindrical conduits,
as seen in Figure 3, by which the interior of the pipe b communicates with
the filter chambers.
The discharge pipe f is likewise held by means of curved pieces g and
screws against short tubular connections or sockets which are arranged
centrally upon the bottom surface of the plates . The interior of the pipe f
which is provided with corresponding bores (Figures 2 and 5) communicates
by these tubular connections and the vertical bores with the horizontal dis-
charge channels m of the plates a.
The parts of the feed pipe band of the discharge pipe f which project beyond
the plates and which are closed all round have-their ends provided with screw
threads for connecting the main feed and discharge conduits respecively as
shown in Figures 1, 4 and 5. If all the filter chambers are not to be used the
conduits formed by the recesses a³ of the corresponding plates can be closed
either by means of india rubber plugs placed into said conduits or by an india
rubber plate placed upon the projections a² instead of the linen strips above
referred to, so that the interior of the feed pipe b will not communicate with
the corresponding chambers.
The feed pipe may of course, be constructed similar to the discharge pipe f
and be made to communicate by tubular connections with the filter chambers,
or vice versa, the discharge pipe f may, be constructed similarly to the feed
pipe band be made to directly communicate by the bores of the plates with
the discharge channels m.
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-
1. A filter-press in which the feed conduit is formed by a pipe (b) so secured
to the top of the press as to be readily dismountable; this pipe communicating
with the filter chambers by recesses (3) arranged on the contact surfaces of
the filter plates (a).
2. A filter-press in which the discharge conduit is formed by a pipe f so
secured to the bottom of the press as to be readily dismountable; this pipe
communicating by bores (k & 7) with the discharge channels (m) of the filter
plates (a) tubular connections or sockets i being inserted between the pipe and
the plates.
3. The improved filter-press constructed and arranged substantially as here-
inbefore described and as illustrated in the accompanying drawings.
Doted this 44k day
D...
1000
A
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.
WAYATA
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.