Abstract: In order to provide a filter press which operates especially reliably and free of wear, a membrane for a membrane plate has a membrane surface enclosed by a membrane margin which is free of perforations. Furthermore, a membrane plate has such a membrane. Moreover, a chamber plate has a number of sludge inflows, each with an inflow orifice spaced apart from the chamber plate margin. Finally, a plate stack has a number of membrane plates and/or a number of chamber plates and also a corresponding filter press.

Abstract: A method is provided for fixedly joining a cloth, a cloth-like fabric or a synthetic mesh to a filter plate using a flanged cloth connector ring. The flanged cloth connector ring is attached to the filter cloth around the feed port of the cloth and inserted into a receiving channel in the filter plate. A locking ring or a distribution ring may be inserted into the channel adjacent to the connector ring to retain the connector ring and attached filter cloth in place. Filter cloths may be individually and independently attached to each side of a filter plate using a cloth connector ring.

Abstract: A filter plate for a filter press assembly is disclosed which is structured with replaceable wear elements to increase the resistance of the filter plate to degradation caused by processing of abrasive filtrates. While the wear elements may eventually degrade due to contact with abrasive filtrates, the wear elements are easily replaceable, thereby prolonging the life of the filter plate and reducing operating costs. The replaceable wear elements may be used to retrofit existing filter plates.

Abstract: A filter press (1) for filtering suspensions is provided with a package of plate-like filter elements (5) which in a filtration position can be pressed sealingly against one another in a parallel arrangement. Thereby the filter elements (5) enclose in pairs a filter chamber which is delimited at least on one side by a planar filter medium. Furthermore, the filter elements (5) are movable to a discharging position in which adjacent filter elements (5) have a distance from one another which allows the removal of the filter cake from the filter chamber. In order to reduce the overall height of such a filter press (1) or to increase the filter surface area with unchanged overall height, it is proposed that the filter elements (5) are alternatingly inclined towards one another in the opposite direction in the discharging position, so that the distance between adjacent filter elements (5) increases in the discharging direction of the filter cake.

Abstract: The present invention relates to a filter device for completely removing residual amounts, after filtration, from the space of the unfiltered product. The filter device comprises a plurality of parallel filtration plates which are separated by filtration layers as well as by membrane plates submitted to the action of pressurized air. The membrane plates are exclusively covered on both sides by a stretched membrane, wherein said membranes have a smooth outer surface and are made of a flexible material so as to cover completely the adjacent space of the unfiltered product.

Abstract: In a filter press, a stack of vertically oriented, horizontally displaceable filter plates enclose filter chambers therebetween. The filter plates are successively moved relative to each other from a closed pressing position, through a pressure relief position, to an open discharge position. At least one connecting element is connected to each filter plate, and is movably coupled to the respective adjacent filter plate by a coupling pin, which slides in a specially configured groove of the connecting element. In the relief position, a respective coupling pin is stopped against an intermediate blocking surface of the groove of the connecting element of the next adjacent filter plate, thereby preventing further horizontal displacement. By unlatching the connecting element, the coupling pin can then slide to a stop surface of the groove, to allow the adjacent filter plates to be displaced farther into the open discharge position.

Abstract: A tower press filtering system (1) is provided. System (1) includes a frame assembly (10) having at least one support engagement portion (14); a collapsible filter tower assembly (20) having a plurality of displaceable filter plate members (20); a press assembly (30) having a support plate member (300), a compression mechanism (320), and a press plate (326); and, a stabilization assembly (40) for automatically maintaining press plate (326) in a fixed planar orientation during displacement thereof. System (1) also includes a port assembly (50) having a substantially rigid conduit segment (52) that maintains coupling with the manifold section (210) of at least one filter plate member (200). System (1) also includes a mechanism by which the coupling of each compression mechanism (320) employed may be adjustably coupled to support plate (300).

Abstract: A filter press frame and method, operable for compressing a stack of filter plates, provides a very light frame as compared to the iron, steel and stainless steel filter press frames that have been used for the last one hundred years. The filter press frame of the present invention is formed of material much more resistant to corrosion for a much wider pH spectrum of acids and bases than iron, steel, and stainless steel frames. In a preferred embodiment, the filter press tail, follower, and head, referred to generally as head members, are comprised of core material inserts encapsulated with fiber reinforced plastic. Laminates have a thickness and fibers are oriented to optimize the construction strength of the components based on stresses that are preferably anticipated through techniques such as finite element analysis.

Abstract: A pair of filter cloths including a feed passage connector for a plate-type filter press is disclosed herein. The filter cloths include first and second tubular members each having opposed first and second free ends and through bores extending continuously from the first free end to the second free end of each of the first and second members. The first free end of the first member is connected to the first filter cloth with the respective cylindrical bore in coaxial alignment with the first feed opening and the second free end of the second member is connected to the second filter cloth. A third tubular member is provided having opposed third and fourth free ends and a radially outer surface and a central bore defining a feed passage. The radially outer surface of the third member is snugly received coaxially within the through bores of the first and second members to sealingly interconnect the first member to the second member.

Abstract: A self supporting filter plate assembly having two opposed screen sections with inwardly shaped deformations which engage each other to maintain a planar surface of the screen sections at a predetermined spacing. The screen sections releasably engage each other. Inwardly directed retaining pins of an exterior frame removably support the screen sections in place within the frame. Each of the screen sections include edges which are bent at 90.degree. with respect to a central planar portion of each screen. The edge portions of the two screen sections interengage with each other by a projection in an inner surface of an edge portion of one screen section engaging with a recess extending from an outer surface of an edge portion of the other screen section. In addition, spaced openings in the edge portions, on opposed side edges of both screen sections, interengage with the inwardly directed retaining pins extending from an inner surface of opposed sides of the frame.

Abstract: A filter press having a horizontal stack of filter plate assemblies, in which removal of filter cake is automated by means of a vibration/shifter carriage that can be moved in steps along a stack of filter plates after a press closing head has been retracted. At each step, the carriage opens up a group of filter plates. The plates are vibrated vertically by cams carried by the carriage. The vibrating action alternately tensions and relaxes the filter cloth for dislodging accumulated filter cake. An improved cylinder and ram arrangement for actuating the closing head is also disclosed and comprises oppositely acting cylinder and ram units carried by an intermediate travelling cylinder carriage. The arrangement achieves the advantages of a telescopic cylinder and ram unit, but at lower cost.

Abstract: A feed port clamp member is disclosed for placement through and about the feed port of a filter plate to provide an abrasion-resistant surface through the feed port of the filter plate to prevent degradation of the underlying filter media and filter plate during high pressure and/or high temperature flow conditions of solids-containing filtration fluid through the feed port. The feed port clamp member is reinforced to provide stability to the feed port clamp member and to assure a secure seal between the feed port clamp member and the filter media. The feed port clamp member provides an improved means of protecting the filter plate and filter media under challenging flow conditions, particularly when the filtration fluid contains non-mineral solids components.

Abstract: A vibration rod for simultaneously vibrating upper-portion support bars arranged to be upwards brought into contact with two ends of the upper-portion support bar to simultaneously vibrate the upper-portion support bars is disposed below the bar for supporting the upper portion of each of filter clothes each of which is disposed between filter plates; and washing pipes each having nozzles pointed to the filter cloth from a position above a gap between filter plates are disposed above the filter plates disposed in parallel so that cakes allowed to adhere to the filter clothes are separated by vibrating the filter plates simultaneously with opening of all of the filter plates. Then, washing water sprayed from the nozzles enables all of the filter clothes to simultaneously be washed and regenerated.

Abstract: Since a filter unit is formed by causing an upper portion support bar for a filter cloth put on a filtering surface of a filter plate to be engaged to a washing pipe integrally provided for the filter plate, a filtering mechanism portion of a filter press can easily be formed by mounting the filter units by a predetermined number. Moreover, the operation control and maintenance of the filter press can easily be performed.

Abstract: This invention relates to a filter cloth suspending apparatus in which a filter cake is produced by pressing sewage and waste water between filter cloths with filter plates, and the obtained cake is discharged. In the apparatus, an upper edge of the filter cloth (3) is supported on an upper supporting bar (13), on the other hand, a lower edge of the filter cloth is formed in a concave shape, and a suspending member (15) is connected to both corners (18, 20). Thus, the contact of the lower edge of the filter cloth with the upper supporting bar is prevented, and damage of the filter cloth is prevented. Further, sagging of the lower edge of the filter cloth is also prevented.

Abstract: An apparatus for filtering a liquid slurry is described. The apparatus uses a pair of filter chambers formed by a pair of fixed plates, and a pair of opposed moveable plates. The moveable plates are moved into engagement with the fixed plates by the downward movement of a wedge member disposed between the plates and, the plates are bias so that when the wedge member is withdrawn, the plates will be drawn together opening the filter chambers. The chambers are sealed by opposed arcuate gaskets so that the sealing action is achieved by internal pressure rather than the pressure driving the plates together. A filter media is provided on a continuous roll which extends between the gaskets and is intended to carry the filter cake out of the chamber when the plates are separated whereupon the cake will be dropped from the filter media into a collection area so that the filter media can be reused.

Abstract: A filter press having an activating mechanism for holding the drip trays in a closed position before the stack of filter plates. The activating mechanism includes a fluid pressure cylinder which moves the drip trays between open and closed positions. The activating mechanism includes a linkage which moves into a locking position when the pressurized cylinder moves the trays into the closed position to automatically maintain the drip trays in the closed position even though pressure to the activating cylinder is relieved.

Abstract: A shifter mechanism for a filter press, which shifter mechanism incorporates a vibrating mechanism for effecting bumping of individual filter plates during the separation thereof from the closed stack to assist in dislodgement of filter cake from the individual filter plates. The vibrating device can selectively vibrate or bump the individual filter plates responsive to the weight of the filter plate being bumped, whereby the vibrating device will be activated only upon sensing a filter plate having a weight greater than a predetermined value so as to be indicative of an undesired quantity of filter cake being adhered thereto.

Abstract: The unloading device for filter press has upper means for supporting a series of filtering cloths which are associated with the opposite front surfaces of a corresponding series of plates arranged in a pack, the plates being compressible between a fixed head and a movable head, whereby to form a succession of filtration chambers into which the liquid to be filtered is fed. The supporting means are vertically movable between a raised filtration position, in which the filtering cloths are stretched, and a lowered unloading position, wherein an upper portion of the cloths forms a fold which is able to facilitate the separation of the bricks formed by the solid filtration residues. The unloading position corresponds to a limited opening of the filtration chambers.

Abstract: A filter element, for use in a plate filter press for example, includes a membrane supported from a plate and captured, about the periphery of an opening in the plate, by a clamping ring which locates a shaped edge bead on the membrane in a complementary shaped groove in the plate. The clamping ring has a bearing surface, which contacts a surface of the membrane edge bead which is oppositely disposed with respect to the portion thereof which cooperates with the groove in the plate, having an angle of inclination with respect to the plane of the plate which directs forces produced by pressure induced expansion of the membrane to the clamping ring in a generally radial direction with respect to the axis of the opening in the plate.

Abstract: A filter-plate assembly has a backing wall having an outwardly directed face and formed with an annular groove opening outward at the face and of a predetermined transverse width and a filter plate adjacent the wall and having an outer peripheral frame set in the groove and of a width substantially less than the width of the groove so as to define therewith an outwardly open annular gap. A generally planar central panel within the frame has a back face turned toward and forming a compartment with the wall and a front face turned away from the wall and adapted to be overlain by a filter cloth. A retaining bar is set in the space and braced transversely between the frame of the element and the backing wall.

Abstract: A filter element has a carrier plate with a mounting groove which extends around a filter chamber recess. A filter cloth blank, which covers this recess, has a mounting frame which is formed on and sits in the mounting groove. The filter cloth is thus positioned easily, quickly and in a crease-free manner on the carrier plate and a liquid barrier is thus obtained at the edge of the filter cloth blank.

Abstract: A filter press plate shifter assembly (21) provided with a shifter housing (22) having a tunnel-like center part which passes over the filter plates and housing parts positioned adjacent opposite side rails (14). Each side housing part mounts a pneumatic plate shifter (41) for permitting the endmost plate in the closed stack to be individually and sequentially shifted away from the stack into an open position when discharge of filtrate is desired. The shifter housing mounts a bumping device (61) which cooperates with the endmost plate in the stack to effect vertical bumping thereof relative to the support rails to assist in loosening sticky cake which adheres to the plate. The shifter housing also mounts an air-assist discharge mechanism (62) which includes a nozzle-bearing head assembly (80, 80') which moves vertically downwardly between the opposed faces of an open pair of adjacent plates for discharging airstreams downwardly against the plates to assist in removing the sticky cake from the plates.

Abstract: A filter press plate shifter assembly provided with a shifter housing having a center part which passes over the filter plates and housing parts positioned adjacent opposite side rails. The housing parts are rollingly supported on rods which extend along the side rails. One housing part mounts a rotary pneumatic motor and a drive roller which drivingly engages the rod. Each housing part mounts a plate shifter unit having a pneumatic shift cylinder which is provided with relatively fixed and movable plate shifting blades. A pneumatic lift cylinder pivots the shift cylinder upwardly so that the blades project between handles of adjacent filter plates, following which the shift cylinder is energized so that the movable blade engages and shifts the endmost plate toward the open press head.

Abstract: A membrane plate for a filter press includes a plate member composed of a plate wall having a peripheral region provided with a plate wall groove and a plate frame surrounding the plate wall. A flexible press membrane is disposed adjacent at least one side of the plate wall and a holding frame covers a membrane edge bead received in the plate wall groove. A connecting arrangement secures the holding frame to the plate frame and permits transverse movement of the holding frame with respect to the plate wall. The connecting arrangement includes a continuous peripheral groove in the plate frame and a continuous, elastic member supported on the holding frame. The elastic member projects from the holding frame and is received by the continuous peripheral groove.

Abstract: A filter plate transport device for filter presses has a slide block which can selectively move first and second directions opposite to each other along guide rails by a cable line. The slide block supports a driving pawl which engages behind a pillow block of a from filter plate in a filter plate stack each time the slide block moves in the second direction, and a drop lever is pointed towards the from filter plate each time the slide block moves in the second direction. To increase functional reliability, on the slide block, a control lever is supported which grips under the drop lever and which can be pivoted by the cable line around a horizontal axle between two stops on the slide block. The control lever, reverses the drop lever and driving pawl, which rests on it between a first position during plate transport and an second position during movement in the second direction of the slide block. The driving pawl and the drop lever mesh with a dynamic path of the filter plates when in the second position.

Abstract: In a suspension and guidance mechanism for the filter plates of a filter press, where the dollies (1) that carry filter plates (3), each dolly with two rollers (4, 5) that are staggered with respect to each other in the direction of movement and are positioned on two rails (8, 9), and that move along the rails by a transport device located between the running rollers, the derailment of the dollies is prevented in that, laterally, next to the rollers (5) that move in the direction of transport, there is a guide bar (15) or that these rollers (5) have an enlarged wheel flange (16), whereby the height of the guide bar (15) or of the wheel flange (16) is greater than the lifting movements of the roller (5) away from rail (9), caused by plate adhesion during the acceleration of the dollies.

Abstract: The present invention relates to a filter carrier 1 for the construction of a filter tower 9. To simplify the construction on the whole, the invention provides for a seal which is arranged on the pressure-exerting plate of the filter carrier and comprises a sealing edge for sealing between the pressure-exerting plate and. the side wall of a filter carrier positioned thereunder, as well as a sealing collar for sealing and retaining the distributor element on the pressure-exerting plate.

Abstract: A plate filter press includes a plurality of face-to-face arranged filter plates movable into open and closed positions. Any two adjoining filter plates together define a filter chamber bounded by a continuous, raised sealing edge carried on at least one of the two adjoining filter plates. Separate heavy liquid intake members constituted by tubular bars are in fluid communication with each filter chamber. The sealing edges are provided with a respective recess extending in a longitudinal direction of the sealing edges. The tubular bars extend in the longitudinal direction and are sealingly received in the respective recesses in the closed position. Each tubular bar has a liquid outlet opening, and each sealing edge is provided with a transverse liquid passage situated between the recess and the filter chamber.

Abstract: The present invention refers to filtering method and a filter device for filtering liquids, especially beverages. The filtering method and the filter device are to be reliable and simple without any negative influence on the quality of the filtrate. A filter is produced in a precoating station by precoating with a filter aid, the filters being then removed from the precoating station together with the filter carriers and introduced into a filtering station, where they are stacked up like a tower and pressed together.

Abstract: A cake removing apparatus for use in a filter press has mounted on a movable frame of the press a pair of front and rear arms having main and auxiliary fabric beating members, means for pivotally moving the arms, and a a lift mechanism for the arms and the arm moving means. When the filter plates are retracted one by one for opening to remove a cake after filtration, the main and auxiliary fabric beating members are positioned above and at the respective front and rear outer sides of opposed filter fabrics as pulled out approximately to an inverted V shape between two opened adjacent filter plates. The arms are opened and closed at a lowered position, causing the main and auxiliary beating members to directly beat the opposed fabrics on the rear surfaces thereof opposite to their cake adhering surfaces to shake the fabrics.

Abstract: A filter press plate shifter assembly provided with a shifter housing having a center part which passes over the filter plates and housing parts positioned adjacent opposite side rails. The housing parts are rollingly supported on rods which extend along the side rails. One housing part mounts a rotary pneumatic motor and a drive roller which drivingly engages the rod. Each housing part mounts a plate shifter unit having a pneumatic shift cylinder which is provided with relatively fixed and movable plate shifting blades. A pneumatic lift cylinder pivots the shift cylinder upwardly so that the blades project between handles of adjacent filter plates, following which the shift cylinder is energized so that the movable blade engages and shifts the endmost plate toward the open press head.

Abstract: The present invention pertains to a filter press which includes a plurality of filter units arranged in tandem. Each unit has a filter plate and filter elements in the form of sheets at either side. Adjacent filter elements of adjacent units form pairs of elements. A working fluid containing liquid and solid components to be separated is charged at positions in between pairs of elements. The liquid filters through the elements into the plates to be exhausted. The solids build up in cakes intermediate the elements of the respective pairs. Each pair of elements is resiliently suspended from an eccentric rotor or shaft. When the cakes are to be dislodged, the press is opened, the units being parted. Rotation of the shaft cyclically slackens the filter elements and snaps them taut, thereby dislodging the cakes.

Abstract: The invention relates to a filter plate for a plate filter press with at least one press diaphragm (6) covered with filter fabric, in which the filter plate (2) and the press diaphragm (6) have at least one shared passage aperture (4), whereby the edge of the aperture (4) of the press diaphragm (6) has a circumferential edge bead (9) which is held in a groove (10) at the edge of the aperture (4) of the filter plate (2) by means of an annular securing component so as to create a seal.

Abstract: A filter press plate shifter assembly provided with a shifting housing having a tunnel-like center part which passes over the filter plates and housing parts positioned adjacent opposite side rails. The housing parts are rollingly supported on rods which extend along the side rails. One housing part mounts a rotary pneumatic motor and a drive roller which drivingly engages the rod to control movement of the shifter assembly along the press. Each side housing part mounts a pneumatic plate shifter for permitting the endmost plate in the closed stack to be individually and sequentially shifted away from the stack into an open position when discharge of filtrate is desired. The shifter housing mounts a bumping device which cooperates with the endmost plate in the stack to effect vertical bumping thereof relative to the support rails to assist in loosening sticky cake which adheres to the plate.

Abstract: A depth filtration method employing a depth filter media sheet, a method of forming the depth filter media sheet and the structure of the depth filter media sheet are described wherein the depth filter media sheet is formed from a wet strength layer and a filter septum layer, the filter septum layer being substantially thicker than the wet strength layer and being formed as a matrix from at least one fiber selected to provide substantial loft and pore structure throughout the filter depth of the filter septum layer, the wet strength layer and the filter septum layer being arranged adjacent each other and preferably bonded together with a lateral surface of the filter septum layer being substantially totally exposed for receiving fluid to be filtered with the porous matrix of the filter septum layer being available to receive and capture particulate solids from the fluid, the filter septum layer also preferably including a second fiber or additional fibers selected in combination with the first fiber for defin

Abstract: A chamber filter press for dewatering waste water or product sludges, comprises a press frame with a number of filter plates movably attached at the head bracket and a crosshead that is hydraulically movable for closing the filter plate bundle. The hydraulic cylinder is supported by a replaceable receptacle device in the form of a flange pipe on the end stand of the press frame. Both flanges of the tubular receptacle device are annular flanges, with dimensions matching the flange of the hydraulic cylinder and they have identical through-bores. The flanges are permitted to pass through the hydraulic cylinder and the end stand has on the attachment side a through-hole for the hydraulic cylinder. The receptacle opening has on the opposite side an installation opening through which the back end of the hydraulic cylinder passes.

Abstract: In order that higher demands on the purity of the separated liquid can be satisfied, a cleaning plant (12) having wash chambers (13a,b) for the cleaning of the filter plates (8) is arranged in longitudinal direction alongside of a filter press (1). By means of a transport device (30) having a displacement device (32) which is moveable along rails (31a) and is equipped with a raisable and lowerable gripper (37) which can be engaged via pawls with filter plates (8), the filter plates, after the opening of the filter press (1), are transported one after the other into the cleaning plant (12), sprayed in one of the wash chambers (13a, b) with simultaneous drawing off of the air or subjected to an immersion bath, possibly disinfected or impregnated, dried and transported back. By the development of the cleaning plant (12) with two wash chambers (13a, b), idle paths of the displacement device (32) are substantially avoided.

Abstract: A spiral filtering device disposed within a frame consisting of two draw bars and two end pieces. The spiral filter consists of at least one spiral plate and at least two support plates with attached filter plates inserted between two end plates. On each of their plane machined surfaces, the spiral plates have a spiral groove of approximately semicircular cross-section. In addition, each surface of the spiral plate has a round depression with a boss in the shape of the bottom of a bottle. The groove is surrounded by a circular channel which is also recessed. The helicity of both grooves on the surfaces of the spiral plates is the same. The outer ends of the grooves are interconnected by a drilled channel at a shallow angle to the surface of the spiral plate. The inner ends of the grooves are connected to their respective recesses by a drilled channel running substantially parallel to the surface of the spiral plate.

Abstract: A device for extending the operable range of a hydraulic cylinder in a filter press is disclosed herein. The filter press includes an overhead beam, first and second end stands connected to respective ends of said beam, a plurality of filter plates movably suspended from said overhead beam between the end stands, and a follower movably mounted and suspended from said overhead beam. The second end stand includes a guide bush and a flange for removably attaching a hydraulic cylinder therein. The device for extending the range of the hydraulic cylinder includes a tube dimensioned to receive the hydraulic cylinder therein, the tube including a shaft at one end thereof receivable in the guide bush, the shaft including a flange extending thereabout to bear against the flange of the guide bush, and a flange extending about the other end of the tube to bear against the flange of the hydraulic cylinder.

Abstract: A new apparatus for extracting water from product or sewage sludge on the spot is provided. It is characterized by a frame matched to the dimensions of a low loader and having lifting supports which can be pivoted in and out and which have multi-step vertical adjustability. Filter presses of substantially higher capacity than those on known apparatuses employing a semitrailer can be used.

Abstract: A filter plate press or an electrolyzer cell has a series of filter plates or cell frames, respectively, which are moved as a stack against a press or cell headpiece by a follower moved by one or more rodded cylinders mounted on a fixed bracket. Scissors mechanisms extending on each side of the press/cell holder and between the bracket and follower assure precise parallel movement of the follower with respect to the headpiece. To accommodate any cumulative errors in the stack dimensions the scissor mechanisms are disengageable upon closure of the press/cell holder so that the follower has freedom to match the abutting surface of the plate/cell frame stack and thus evenly seal the abutting peripheral edges of the plates/cell frames.

Abstract: A filter press including a filter plate set suspended on top guide rails wherein the filter plates are covered on both sides with filter cloths, and with a plate-conveying slide movable along the guide rails. A vibrating device for shaking the filter cloths in order to eject the filter cakes is arranged on the plate-conveying slide, with shaking motion of the vibrating device being oriented predominantly perpendicularly to the filter cloth plane.

Abstract: An apparatus for effecting the separation of filter plates within a filter press is disclosed. The apparatus includes a guide track having mounted thereon a slidably reciprocal carriage. The carriage includes at least one pivoted pawl having an abutment space defined thereon for contacting a filter plate to be transported. The pawl is held in a raised orientation by a resilient spring means. The carriage is driven along the guide track by means of a pressure displaced piston mechanically associated therewith. The piston is housed within a tubular member. Positioned within the tubular member are two pressure chambers, one on each end of the piston. Pressurized fluid is controlledly introduced into one or the other of those chambers to effect a displacement of the piston. The pressure cylinder is of the type generally designated a rodless cylinder.

Abstract: A membrane plate for filter presses including a supporting plate with a clamping rim elevated on both sides, a frame, and a membrane clamped in place between the supporting plate and the frame. The membrane is enclosed inwardly of the clamping rim between two approximately V-shaped diverging contact surfaces of the supporting plate and the frame and is capable of elastic deflection toward both sides of the membrane. To attain a high resistance to continuous stress, the membrane is provided inwardly of the clamping rim with a wavy or undulation zone wherein the undulation or wave crests extend in parallel to the clamping ring. At least one outer undulation or wave crest is enclosed between two contact surfaces, with this wave crest projecting with a back surface thereof into a flaring space defined by the contact surfaces lying in opposition to a pressure medium chamber of the filter press.

Abstract: An apparatus for effecting the separation of filter plates within a filter press is disclosed. The apparatus includes a guide track having mounted thereon a slidably reciprocal carriage. The carriage includes at least one pivoted pawl having an abutment space defined thereon for contacting a filter plate to be transported. The pawl is held in a raised orientation by a resilient spring means. The carriage is driven along the guide track by means of a pressure displaced piston mechanically associated therewith. The piston is housed within a tubular member. Positioned within the tubular member are two pressure chambers, one on each end of the piston. Pressurized fluid is controlledly introduced into one or the other of those chambers to effect a displacement of the piston. The pressure cylinder is of the type generally designated a rodless cylinder.

Abstract: A filtration method includes steps of feeding liquid to be filtered into a filter medium between a fixed plate and a movable plate; and reducing capacity of a filter chamber formed by the medium by moving the movable plate in a direction in which the movable plate presses the fixed plate through the medium so as to perform expressing filtration of the liquid and to produce cake. The reducing step comprises alternately repeating at least one time an expressing pressure-increasing process for increasing pressure in the liquid in the medium by a specified increment in the filtration of the liquid, and an expressing pressure-maintaining process for maintaining the pressure constant during a specified period, so that the filtration is performed under a specified pressure corresponding to a desired water content of the cake to produce the cake. A filter press for employing the method has the filter medium arranged between the fixed plate and the movable plate capable of moving toward and away from the fixed plate.

Abstract: A filter plate press or an electrolyzer cell has a series of filter plates or cell frames, respectively, which are moved as a stack against a press or cell headpiece by a follower moved by one or more rodded cylinders mounted on a fixed bracket. Scissors mechanisms extending on each side of the press/cell holder and between the bracket and follower assure precise parallel movement of the follower with respect to the headpiece. To accommodate any cumulative errors in the stack dimensions the scissor mechanisms are disengageable upon closure of the press/cell holder so that the follower has freedom to match the abutting surface of the plate/cell frame stack and thus evenly seal the abutting peripheral edges of the plates/cell frames.

Abstract: A device for separation of constituents, separable in a filter, from a liquid medium, comprising a stack of a plurality of plate units (10), arranged one after the other, with filters (11) arranged therein. Along the filters there are arranged rotors (24) for scraping off coatings deposited on the filters. Each rotor is mounted on a separate shaft piece (22) arranged in each plate. The shaft pieces are connected to each other by means of connections which can be drawn apart in the stacking direction of the plate units. Defects in the device can be detected in a channel (20) which extends in the stacking direction of the plate units and which is common to liquid having passed through the filter. A defective plate unit can be shut off, while maintaining the separation device in operation, and be replaced without dismantling the entire device (FIG. 7).

Abstract: An apparatus for effecting the separation of filter plates within a filter press is disclosed. The apparatus includes a guide track having mounted thereon a slidably reciprocal carriage. The carriage includes at least one pivoted pawl having an abutment space defined thereon for contacting a filter plate to be transported. The pawl is held in a raised orientation by a resilient spring means. The carriage is driven along the guide track by means of a pressure displaced piston mechanically associated therewith. The piston is housed within a tubular member. Positioned within the tubular member are two pressure chambers, one on each end of the piston. Pressurized fluid is controlledly introduced into one or the other of those chambers to effect a displacement of the piston. The pressure cylinder is of the type generally designated a rodless cylinder.