Abstract: A system for moving a filter or a retainer into or out of a fluid pathway without halting the movement of the fluid in the pathway. When acting as a filtering device, the system includes a filter frame and a drive mechanism for slidingly moving the filter frame on stationary rails that remain in the duct through which the fluid is transferred. When a retainer device, the system includes a retainer and a drive mechanism for slidingly moving retainer on stationary rails that remain in the chamber through which a fluid under treatment passes. The system includes isolation means permitting the filter frame or retainer to pass into or out of the duct or chamber without exhausting the fluid within the duct or chamber. The drive mechanism may be a guillotine damper gate drive, a spindled drive, a hydraulic actuator or other drive means. The filter or the retainer may include a plurality of bays that are rigidly, hingedly, or detachably connected together.

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: The invention relates to a device and an assembly for cross-flow filtration comprising filter cassettes. Said filter cassettes are cost-effective to produce as they have few connections and simple clamping plates and are characterized by a long service life and by being highly flexible in adapting their capacity to the desired cross-flow filtration performance. The inventive device (1) comprises a holder and at least one filtration segment (2) consisting of clamping plates with filter cassettes fitted in a sealed manner therebetween. The clamping plates, which are configured as end plates, separation plates, distribution plates and collection plates and the filter cassettes are positioned on the holder so that they can be moved towards one another.

Abstract: The invention relates to a press membrane (9) for a filter plate (1?) of a filter press. Said press membrane consists of a rubber-elastic material and is supported by the filter plate (1?) while supporting a parallel filter cloth (14). An intermediate chamber defined between the press membrane (9) and the filter plate (1?) can be impinged upon with a pressure medium. The aim of the invention is to prevent an overload of the membrane material in the area of the supporting cams (6) and damages of the filter cloth (14) in said areas. To this end, the press membrane (9) is provided with transmission disks (12) in the area of the supporting cams (6), said transmission disks (12) consisting of a substantially harder material than the rubber-elastic material of the remaining press membrane (9) and being vulcanized into the rubber-elastic material.

Abstract: An improved wide passage cross-flow filtration cassette is disclosed that incorporates an open mesh matrix retentate spacer that is dimensioned and oriented so as to improve flux and cause turbulence in the flow of fluids through the cassette.

Abstract: A module filter has a container with an admission for a non-filtrate and a discharge for the filtrate. A filter module is arranged in the container and has several stacked, disc-shaped filter cells of filter material having an inner space. The filter cells have central openings forming a central channel connected with the inner space. The central channel is connected to the admission. The container has a space surrounding the filter cells and connected with the filtrate discharge. Circular disc-shaped drainage support bodies are arranged between the filter cells and extend approximately over the entire surface area of the filter cells. The drainage support bodies have drainage channels that extend toward their outer rim. The drainage support bodies have projections projecting axially away from the drainage support bodies and extending radially. Between the projections intermediate spaces are defined which form the drainage channels and remove the filtrate.

Abstract: A laminated modular water filter includes superposed annular plates. A filter unit is disposed between each adjacent pair of the annular plates. The annular plates include a top plate, a bottom plate, a plurality of intermediate plates, and at least one flow-guiding plate sandwiched between two of the intermediate plates. Each of the top plate, the intermediate plates, and the bottom plate has an annular outer passage unit in fluid communication with a curved outer passage unit in the flow-guiding plate. Dirty water is introduced into two side openings in the top plate, and flows into central holes in the annular plates via the filter units so as to form filtered water. Solid particles in the dirty water are guided into two side openings in the bottom plate via the annular outer passage units and the curved outer passage unit.

Abstract: A filter press for filtering suspensions includes plural parallel filter plates that can be displaced relative to one another. In a filtering position, the filter plates are compressed to a package that forms a filter chamber provided with at least one filter cloth between neighboring filter plates. In a discharge position, neighboring filter plates are moved apart by a discharge distance so that a filter cake adhering to the filter cloth can be discharged. Every filter chamber is provided with at least one filling element for feeding the suspension to the filter chamber. The filling element is disposed on a protruding part that protrudes beyond a plate body face or contour and within a sealing edge on the periphery of the filter plates. In the filtering position, the filling elements are sealingly clamped between neighboring filter plates and form a suspension supply channel that extends through the filter plate package.

Abstract: A combination filter assembly having a plurality of filter sieves positioned in parallel one after the other in the direction of flow. The filter sieves are stretched and mounted in housing elements to form filter elements. The housing elements are in contact with each other by means of top and bottom bearing faces, and are maintained in a stack. The filter elements have a cylindrical shape with annular bearing faces, wherein one bearing face includes a centering male coupling and sealing formation, and the other bearing face includes a corresponding centering female coupling and sealing formation.

Abstract: The invention relates to a filter module (4) with a simplified design which allows for the manufacturing of a step filter, Each ply of filter medium is composed of a deep-bed filter material layer (1, 1a-d) and the packing is composed of draining layers (5, 5a, 5b). The draining layers (5, 5a, 5b) and filter layers (5, 5a, 5b) are mutually sealed to the filtrate/non-filtrate chamber (2,3). The filter layers (1, 1a-d) can be arranged according to any pattern.

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 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 invention relates to a filtration device for deep-bed filtration which is easier to handle and enables filter modules(s) to be changed and disposed of easily. The filtration device has a casing with at least one filter module inserted in the casing with filter elements made from deep-bed filter materials stacked on top of each other. The filter elements have at least one internal structure formed by a perforation wherein the boundary surface of the perforation formed by the deep-bed filter materials creates a through-flow surface for filtrates or non-filtrates. At least one end plate has at least one inlet and/or outlet.

Abstract: An apparatus for the separation of fluid mixtures into a permeate and a retentate comprises separation modules each having fluid containment chambers stacked therein. Each fluid containment chamber is defined by a pair of selectively permeable membranes having their active surfaces facing inwardly toward one another, with a gasket sandwiched therebetween in sealing engagement with each membrane. A channelled support plate is positioned adjacent to the outside surface of each membrane. The channels in the support plates fluidly communicate with a housing, thereby allowing negative pressure from the housing to be brought into direct contact with the outside surface of each selectively permeable membrane. The fluid mixture is pumped into each fluid containment chamber at one end and moves across the active surfaces of the membranes toward a retentate receiver positioned at the opposite end. In doing so, permeate is drawn out through both membranes into the channels and the housing.

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: A wrought metal single piece filter outlet plate or inlet frame, which is weld free in the liquid contact areas and sealing surface areas. The frame is used as an inlet frame or as an outlet plate for a horizontal or vertical type filter unit. The support ears on the sides of the plate and frame are an integral part of the wrought plate or frame, welded to the plate or frame or attached to the plate or frame utilizing any number of fasteners. Advantageously, the filter elements may be mounted in a filter press assembly at an angle to increase drainage.

Abstract: A laminated modular water filter includes a top plate, a bottom plate and a plurality of superposed intermediate plates disposed between the top and bottom plates. Each adjacent pair of the top, intermediate and bottom plates are interconnected removably, and define an accommodating space therebetween, within which a filter unit is received fittingly. Each of the top and bottom plates has a central hole which is in fluid communication with central holes in the intermediate plates, and two side openings which are in fluid communication with a plurality of annular outer passages units in the intermediate plates that are in fluid communication with the accommodating spaces. Each of the filter units includes two filter films interconnected fixedly along outer peripheries thereof, and a filter net disposed between the films so as to define an annular filtered-water passage between the films that is fluid communication with the central holes.

Abstract: Blood is purified by removing the whole blood from a patient and feeding the blood into a manifold in a centrifuge. A purifying chamber is formed in the centrifuge from a plurality of co-arcuately arranged modules. The blood is supplied from the manifold to each of the modules. Each module contains a stack of dialysate membranes. Fresh dialysate is fed into the manifold and then to each of the modules. Under centrifugal force the cells are separated from the plasma. The plasma is purified by removing contaminants as a result of the action of the dialysate and membranes. The purified blood is returned to the patient by being fed back to the manifold and then to the patient. The used dialysate/contaminants are fed from the modules back to the manifold and out of the centrifuge.

Abstract: In a vacuum chamber, which has at least two vacuum regions, substances, especially fluids, are transported in a directed manner from one region into the other region by the application of a suitable vacuum. As a result, it is possibly by the use of filter supports or receiver supports to transport a fluid automatically through corresponding filter supports during a plasmid preparation. The vacuum chamber is charged by means of a gripping robot that operates automatically and is switched by a suitable valve control means. By incorporating the vacuum chamber with its gripping robot and the control means into a pipetting robot system, automatic plasmid preparation, for example in accordance with the Qiagen protocol, is possible.

Abstract: A laminated modular water filter includes superposed annular plates. A filter unit is disposed between each adjacent pair of the annular plates. The annular plates include a top plate, a bottom plate, a plurality of intermediate plates, and at least one flow-guiding plate sandwiched between two of the intermediate plates. Each of the top plate, the intermediate plates, and the bottom plate has an annular outer passage unit in fluid communication with a curved outer passage unit in the flow-guiding plate. Dirty water is introduced into two side openings in the top plate, and flows into central holes in the annular plates via the filter units so as to form filtered water. Solid particles in the dirty water are guided into two side openings in the bottom plate via the annular outer passage units and the curved outer passage unit.

Abstract: The invention relates to a device and an assembly for cross-flow filtration comprising filter cassettes. Said filter cassettes are cost-effective to produce as they have few connections and simple clamping plates and are characterised by a long service life and by being highly flexible in adapting their capacity to the desired cross-flow filtration performance. The inventive device (1) comprises a holder and at least one filtration segment (2) consisting of clamping plates with filter cassettes fitted in a sealed manner therebetween. The clamping plates, which are configured as end plates, separation plates, distribution plates and collection plates and the filter cassettes are positioned on the holder so that they can be moved towards one another.

Abstract: Disclosed is a disposable dialysis cassette which is flat, flexible, self-closing and applicable to solutions containing proteins, DNA, RNA, or other molecules. The dialysis cassette embodies a first and second semi-permeable dialysis membrane, or tubular dialysis membrane, sealed by a flexible frame to form a dialysis chamber having a self-closing channel for the introduction of a dialysis sample by either a pipette or other dispensing mechanism.

Abstract: A pressure filter includes two continuous mating surfaces movable relative each other and a filter medium capable of being disposed therebetween. A surface, provided for supporting the filter medium, is bounded by and is substantially coplanar with one of the continuous mating surfaces. The filter further includes a shallow inlet cavity, bounded by the other of the continuous mating surfaces, and an inlet distributor in communication with the inlet cavity. The inlet distributor includes at least one opening and may be of internal or external type. When the mating surfaces are pressed together, a shallow filtration chamber is defined by the inlet cavity and the filter medium. The filter apparatus may include a plurality of shallow filtration chambers, stacked one above the other, and constructed as described above.

Abstract: In one embodiment, a membrane stack is described for separating dialysate and diffusate. The membrane stack comprises a plurality of membrane sheets and a plurality of spacers interspersed between the plurality of membrane sheets. Each spacer includes a gasket bordering a screen diagonally woven. These membrane sheets and spacers are affixed together by form a collective unit.

Abstract: An integral gasketed filtration cassette structure of a type comprising a filtration cassette fully or partially overcoated by a gasket layer, forming a fluid-tight seal between the filtration cassette and the filtration cassette holder to which the filtration cassette is to be affixed. The filtration cassette comprises filter sheets arranged in a multilaminate, peripherally bonded array, wherein the filter sheets alternate with permeate and retentate sheets. The gasket layer comprises an elastomeric material with suitable hardness and temperature resistance for sealing, such as silicone, ethylenepropylenedienemonomer (EPDM), viton, polyurethane, polypropylene, polyethylene, polyvinylchloride, polyester, epoxy, ethylvinylacetate, bunnas, and styrene butadiene. The filtration cassettes and filter of the invention may be advantageously employed for dewatering of aqueous biomass suspensions, desalting of proteins, removal of secreted metabolites from cellular suspensions, and the like.

Abstract: The invention relates to improved cross-flow filter cassettes for the filtration of liquid media, which are used in cross-flow filtration devices of varying pump outputs and can be fitted with non-reinforced membranes. The cassettes comprise at least one retentate separator in which the inlets to the open perforations designed to form one type of channel, for example for retentate discharge, are larger than the inlets to the open perforations designed to form another type of channel, for example for fluid feed. In comparison with known cross-flow filter cassettes, the cross-flow filter cassettes of the invention allow retentate flows required to achieve equal filtration output at equal pressure differential on the retentate side at least 1.8 times lower. This significantly reduces the energy input required for pumping to conduct cross-flow filtration.

Abstract: The present invention is directed to a plate-and-frame type membrane module inserted durable balls using vortex flow, and the membrane module can reduce concentration polarization, cake or gel layer and membrane fouling which generally occur in processes using plate-and-frame type membrane. Thus, the use of a membrane module according to the present invention can prolong the period for cleaning of a membrane module and the exchange period of a membrane module, as well as maximize a passing amount without decreasing a quality of permeate.

Abstract: The invention relates to a filter press having a plurality of filter plates forming filter chambers between each other. A pressing diaphragm is supported on the filter plates. The pressing diaphragm is provided with an edge strip that extends all around. The edge strip is welded to a support wall of the filter plate, whereby the edge strip, on its side facing away from the support wall, is provided with transversely extending cutouts. Provision is made between the edge strip and the plate frame for a filtrate channel into which filtrate drain ducts feed, these ducts lead to a filtrate outlet.

Abstract: A filter device, particularly for filtering melt-type fluids, such as polymer melts, includes at least one filter disk having two filter disk halves connected to each other by their edges and provided with filter material on their exterior surfaces. The filter disk halves are held apart by a supporting device delimiting a substantially free hollow area between them, through which a fluid can flow freely. Inwardly, they delimit an outflow opening for the melt-type filtered fluid. The supporting device has individual supporting cams of substantially equal outer dimensions and arranged in several groups. Separated from each other, the supporting cams extend radially outwardly form the outflow opening, are rigidly connected to at least one of the two halves, and traverse the hollow area in such a way as to rest against the other filter disk half. This results in a filter device which is economical to produce and which has enhanced filter performance when in operation.

Abstract: A vibratory separation system having a drive mechanism for imparting a vibratory motion to a membrane module to enhance filtration. The membrane module comprises one or more filter elements secured to one another, each having a permeable membrane. The vibratory motion imparted to the membrane module generates a dynamic flow boundary layer at the permeable membranes. This fluid shear boundary layer, in turn, generates lift, thereby inhibiting fouling of the membranes.

Abstract: The invention discloses an improved apparatus for continuous purification of liquids, dewatering and drying of the separated non-filtering solids. The apparatus is intended to be applied for the purification of industrial or household waste liquids, as well water form natural sources, by separating and drying of non-filtering solids. The apparatus can be applied successfully for dewatering and drying of various slurries without the emitting of vapours, dust and other detrimental substances in the atmosphere. The apparatus includes a belt filter (1) with an incorporated filter sector and an elastic thermos-filter press (35). The belt filter ensures a continuous purification of water from different sources by separating the non-filtering solids and detrimental ion components comprised in the water, and ensures their bacterial sterility. The separated non-filtering solids are permanently accumulated in the belt filter, and are mixed with the water fed to be purified forming together a slurry.

Abstract: In a membrane treatment method, raw liquid is supplied to a circulation tank, and circulation liquid is supplied into an inter-membrane passage between filtration membranes disposed within a membrane apparatus, which is disposed separately from the circulation tank. Filtrate is obtained from the circulation liquid within the inter-membrane passages via the filtration membranes, and the circulation liquid is circulated by a circulation pump disposed between the circulation tank and the membrane apparatus, while returning the remaining circulation liquid to the circulation tank. A portion of the circulation liquid overflows from the circulation tank. A membrane treatment apparatus comprises a membrane apparatus, a circulation tank, and a circulation pump. The membrane apparatus includes filtration membranes disposed to form an inter-membrane passage between the filtration membranes. The membrane apparatus takes out filtrate from circulation liquid in the inter-membrane passage.

Abstract: A filter press and method for separating solids from a slurry. The filter press includes a plurality of plates which are held in a sealed and contacting relationship with one another to form a plate stack. The plate stack includes alternating diaphragm-type squeeze plates and cloth-type chamber plates whereby two adjacent plates form a filter chamber therebetween for filtering the slurry. The diaphragm-type squeeze plates include a thin liquid impermeable diaphragm or membrane having a uniform thickness for greater flexibility and heat transfer.

Abstract: The present invention is a two piece frame embodiment in which a novel diaphragm inflation assembly and method are provided. Primary pieces include a two piece frame, two diaphragm pieces and two filter cloths integral with rubber gasketing. The two piece frame defines substantial voids to reduce weight, the two pieces comprising mirror image pieces. The intent of this embodiment is to reduce the weight, and therefore material and handling effort, of the prior art filter plates.

Abstract: The invention concerns a method and a device for separation of separable constituents from a liquid medium. The separation device comprises only one cell or a stack of a plurality of adjacent cell, whereby each cell consists of a plate unit containing a filter, an inlet for supplying the liquid medium into a chamber, and outlet for discharging the reject and an outlet for discharging the permeate. The liquid medium is subjected to a strong turbulence created by a convenient designed rotor, possible combined with sound waves, whereby the deposition of separable constituents on the filter is prevented or essentially reduced.

Abstract: Apparatus for removing water from water containing liquids in which a chamber with walls formed from a zeolite membrane can be immersed in the liquid mixture so that water passes into the interior of the chamber where it can be removed.

Abstract: This invention relates to a microporous or macroporous affinity filtration membrane wherein the matrix is composed of chitosan or chitin and the pores are made by dissolution of porogen during the preparation of the membrane. The invention also relates to a method of preparation of the membrane comprising preparing an acidic chitosan solution containing porogen, shaping the suspension into a membrane, and dissolving the porogen by immersing the membrane in an alkaline solution. To prepare chitin membranes, the chitosan membranes are acetylated. The special feature of the membrane is that the pore size can be controlled by varying the size of the porogen. The membranes are suitable for affinity purification of macromolecules.

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: Membrane element consisting of carrier disk and membrane cushion for filtering and separating flowing media, especially in devices for filtering and separating fluids by membrane techniques. Aim of the membrane element according to the invention is the essential reduction of the losses of pressure inherent to the modules by eliminating the sharp redirections of the flow by the usual carrier disks and membrane cushions in plate modules. This is achieved by a circular guidance of the flow of the fluid to be separated between carrier disk and membrane cushion. The carrier disk according to the invention is provided with a slit-like passage so that, after a concentric, circular flow over the carrier disk and the corresponding membrane cushion, a guidance of the flow to the next carrier plate level with the correspondingly formed membrane cushion is made possible with minimal loss of pressure and almost without redirections.

Abstract: An integral, monolithic frame-membrane is disclosed, such frame-membrane having a semi-permeable membrane portion and integral therewith a frame portion, the frame portion having one or more cavities, each cavity juxtaposed to the membrane portion, each cavity having at least one fluid entrance conduit communicating with an entrance manifold aperture and at least one fluid exit conduit communicating with an exit manifold aperture. The integral, monolithic frame-membrane may be used in apparatus for carrying out gas-separation; microfiltration; ultrafiltration; nanofiltration; reverse osmosis (i.e. hyperfiltration); diffusion dialysis; Donnan dialysis; electrodialysis (including filled-cell electrodialysis; i.e. electrodeionization); pervaporation; piezodialysis; membrane distillation; osmosis; thermo osmosis; and electrolysis with membranes.

Abstract: A filtration cassette of a type comprising filter sheets arranged in a multilaminate, peripherally bonded array, wherein the filter sheets alternate with permeate and retentate sheets. A stacked assembly of such filtration cassettes may be employed to form a stacked cassette filter. The filtration cassettes and filter of the invention may be advantageously employed for dewatering of aqueous biomass suspensions, desalting of proteins, removal of secreted metabolites from cellular suspensions, and the like.

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 blood processing system and associated method include a first variable volume chamber to hold blood and a second variable volume chamber to hold additive solution for blood. The system and method further employ a separation device to remove undesired material from blood. An actuated element exerts external force simultaneously upon both first and second variable volume chambers to expel a first flow of blood from the first variable volume chamber and a second flow of additive solution from the second variable volume chamber. The system and method mix outside the first and second variable volume chambers the blood flow with the flow of additive solution to create a mixed flow comprising blood and additive solution. The system and method direct the mixed flow of blood and additive solution through a filter to remove undesired matter from the blood.

Abstract: Steel reinforced filter plates consist of an inner steel sheet and front and back panels composed of thermoplastic resin. The front and back panels of the filter plate are composed of thermoplastic synthetic resin and are bond to each other through a series of prefabricated openings in the steel sheet. The inner steel sheet of the filter plate of the invention further contains at least one exit port hole and a drainage channel leading from the port hole. The filter plate further contains a feed port (passageway) extending from the exterior of the front panel to the back panel. The thermoplastic synthetic resin encompasses all of the exposed surfaces of the filter plate--all of the steel lining the prefabricated openings, port holes and drainage channel being encased by thermoplastic synthetic resin. The filter plate of the invention is produced via an injection molding process wherein a prefabricated steel sheet is first inserted between the upper and lower regions of a mold.

Abstract: A filter membrane element for a membrane separation unit for use in a water treatment apparatus or the like, and a method of manufacturing the same. An organic filter membrane including a plate-like support member made of nonwoven fabric and a film coating formed on both sides of the support member is joined with a surface of a filter plate, whereby the filter membrane element is formed. A portion of the film coating is dissolved to cause the support member to be exposed at that portion. Subsequently, the exposed portion of the support member is joined by adhesion or otherwise with a corresponding portion of the filter plate.

Abstract: A filter-plate assembly has a support plate having an outwardly directed face and formed with an annular groove opening outward at the face and a chamber plate confronting the face of the support plate, forming therewith an inlet compartment, and formed with an inlet-port cutout opening into the compartment. A flexible filter plate adjacent the support plate has an outer peripheral frame set in the groove and a generally planar central panel within the frame and having a back face turned toward and forming a compartment with the face of the support plate and a front face turned away from the support plate and adapted to be overlain by a filter cloth. A rigid retaining bar overlying the frame extends parallel to it at the cutout. Bolts or the like secure the retaining bar relative to the support plate against the frame to hold the frame tightly in place in the groove of the support plate at the cutout.

Abstract: A plate filter press with chamber plates and diaphragm carrier plates and diaphragms secured thereto is provided that makes it possible to provide an adequately large, radial slurry admission cross-section that remains free of blockage. An annular supporting collar that respectively embraces the aperture edge of the chamber plate and has a U-shaped cross-section in its edge region is arranged in the central flow-through opening of every chamber plate, whereby the end of each U-leg comprises an annular seating wedge for supporting the arched diaphragm. The seating wedge extends in the direction of the respectively neighboring diaphragm and does not constrict the radial flow channel to the respective filter space.

Abstract: A filter cartridge for separation of aqueous colloidal suspensions utilizing a shell which forms a chamber having a colloidal suspension inlet and outlets for permeate and concentrate streams. A core is placed within the shell and includes a plurality of filter elements which are located in overlying relationship with one another. Each filter element possesses a relative rigid backing member and a filter membrane. The core is fastened to the shell by connecting a plurality of the backing members to the body of the core.

Abstract: A filter for cross-flow filtration of a fluid containing suspended or emulsified substance is constructed of equally dimensioned plates. Between the plates there are passages for retentate and permeate flow. The plates have in- and outlet openings to form collection channels, through which unfiltered fluid is led to and retentate and permeate is led away from the passages. There are plates (1) (membrane plates) comprising a membrane of material which is chemically and physically inert to the fluid, which membrane has a pore size of 0.1-50 .mu.m through which membrane the permeate passes. There are also plates (2) which are impervious to the fluid. Retentate (6) and permeate (8) passages are formed between the plates (1, 2), which all have three openings (3, 4, 5). The retentate passages (6) are connected to the channel for unfiltered fluid and to the channel for retentate and sealed against the channel for permeate.