Abstract: In a filtering apparatus several elongated filter elements are located parallel to each other in a housing chamber. Free ends of the filter elements are connected by means of a narrow support member fastened to the housing. Arms are pivotingly adjustably connected to the support member. The arms include slots for receiving a threaded spindle projecting from the filter elements. The arms can be swung out of the way to permit insertion of the filter elements and then rotated until the slot becomes aligned with the spindle. Thus, the filter elements can be installed separately and sequentially.

Abstract: A disk filter including a plurality of rotatable, annular filter disks (3) arranged mutually spaced in an axial direction, and disposed for being partially immersed in a liquid or a suspension to be filtered. Each filter disk comprises a plurality of filter sections (4) which are in communication with axially directed filtrate conduits (2) arranged in the peripheries of the disks (3) for discharge of filtrate. The filtrate conduits (2) are provided with backwash barriers which are adapted to prevent liquid flow from the filtrate conduits radially inwards when the filter sections (4) rise above the liquid surface. The backwash barriers have been achieved by each filter section (4) being connected to an axial filtrate conduit in the form of a pipe (2), the main portion of the cross-section of the pipe at the place of attachment being located after each part of the filter section (4) as seen in the direction of rotation (A).

Abstract: Filter element, formed by a supporting body with a filtration part and a connecting part extending therefrom, in which the filtration part has the form of a flat ellipse or a flat rhomb, from which the connecting part gradually extends to a rounder shape, while over the supporting body a filter bag has been applied which at the open end has been fastened onto the connecting part by means of a clamp device.

Abstract: A filter leaf having a drainage member which is fabricated by combining a plurality of preforated and texturized sheets into a sandwich structure. The drainage member is covered in both sides by a pair of surface screens, and the entire assembly is secured together by a suitable frame.

Abstract: The cross flow filter method includes an open tank having a first liquid retaining section, a second filter retaining section and a third solids collecting section in fluid communication with each other. A filter assembly is retained within the second section and includes a filter panel having a generally vertically disposed porous media surface. Filtrate is removed by applying very low vacuum pressure in communication with the filter panel such that filtrate is drawn through the pores of the filter media surface at a flow rate Q.sub.out. Fluid to be filtered is simultaneously cross flowing vertically downward across the filter media surface at a flow rate Q.sub.x, such that the horizontal velocity V.sub.h of fluid drawn through the filter media surface is very slight with respect to the vertical velocity V.sub.v of the cross flowing unfiltered fluid.

Abstract: A cross flow filter apparatus and method uses an open tank having a first liquid retaining section, a second filter retaining section and a third solids collecting section in fluid communication with each other. A filter assembly is retained within the second section and includes a filter panel having a generally vertically disposed filter membrane surface, preferably with submicron pores. Filtrate is removed by applying low vacuum pressure, in the range of about 5 inches vacuum pressure (Mercury), in communication with the filter panel such that filtrate is drawn through the pores of the filter membrane surface at a flow rate Q.sub.out. Fluid to be filtered is cross flowing vertically downward across the filter membrane surface at a flow rate Q.sub.x, such that the horizontal velocity V.sub.h of fluid drawn through the filter membrane surface is less than the vertical velocity V.sub.v of the cross flowing unfiltered fluid.

Abstract: In a sector-shaped screen segment for disk filters or thickeners with a folded screen for thickening fiber suspensions comprising a frame, two screen carriers and a screen resting on the outer sides of the screen carriers, manufacture is rendered simpler and less expensive by the frame and the screen carriers forming an integral molded part in which the screen is embedded in the molding process.

Abstract: A disk filter, including a plurality of rotatable, axially spaced annular filter disks (6:1-6:11) adapted to be partially immersed in a liquid or a suspension which is to be filtered. Each filter disk comprises a plurality of filter elements 6:1a-f . . . 6:11a-f) which are in communication with axial filtrate conduits (2a-2l) arranged at the outer peripheries of the annular disks for discharge of filtrate. For increasing the flow speed of the filtrate in the axial filtrate conduits these slope downwards in the flow direction. This has been achieved in that a filter element (6:1a) of a filter disk (6:1b) is displaced relative to the filter element (6:2a) of the filter disk (6:2) connected to the same filtrate conduit (2a) and being the following filter disk, counted in the flow direction in the axial filtrate conduit, so that the first mentioned filter element is in advance of the later mentioned filter element, as counted in the direction of rotation.

Abstract: A filter section for a roatatable filter of the kind including a plurality of sections (5) assembled into an annular filter disk. Each section (5) comprises two mutually spaced plate-shaped elements (6,7) which are at least partially perforated and provided with protrusions (8) keeping a filter cloth (9) spaced from the plate-shaped elements. The space between the plate-shaped elements (6,7) is in communication with a discharge conduit (2) for filtrate. At least one substantially radial drainage channel (12) is arranged between the plate-shaped elements (6,7), this channel communicating with the outlet (13) of the section. The space between the plate-shaped elements (6,7) at the side of the drainage channel (12) is filled with a hardened compound (11), and the plate-shaped elements (6,7) are provided with openings (10) towards the channel (12).

Abstract: A system for continuously or periodically flushing collected particles from filter leaf assemblies without interrupting the filtering operation is disclosed. The filter leaf assemblies are constructed from a pair of like grid-like filter media support panels mounted in spaced parallel relationship within a rigid rectangular peripheral frame. Sheets of filter media overlie the outer surfaces of the support panels and are fixedly sealed to the frame around the entire periphery of the panel. One side of the frame is fixedly mounted to an outlet pipe whose interior communicates with the space between the support panels via mating slots in the pipe wall and frame. Two filter media attachment arrangements and two frame to pipe mounting arrangements are disclosed.

Abstract: A filter unit using a bump-type filter is disclosed. Briefly stated, a chamber has a fluid inlet conduit so that contaminated fluid, upon entering the chamber, is directed upwardly towards filter tubes and downwardly towards the bottom of the chamber. The fluid flow is diverted during startup so as to be directed only downward. A bump handle is disposed between two fluid outlet conduits such that one is opened and the other is closed and the reverse when the bump handle is in a first or second corresponding position. A plurality of microswitches are utilized so that the pump is not enabled during bumping or when a dump valve is open, but is enabled during system operation or startup.

Abstract: A backflushable filter including a housing having an inlet coupled to an upstream fluid inlet and an outlet coupled to a downstream fluid outlet, a filter assembly including a plurality of cylindrical filters, defining an upstream surface communication with the inlet and a downstream surface communication with an axial hollow volume therein, the axial hollow volume communicating with the outlet, a backflushing assembly comprising a backflushing nozzle disposed in each axial hollow volume for backflushing engagement with each of the cylindrical filters at its downstream surface, and a backflush drain communicating with the upstream surface.

Abstract: A precoat filter element for a precoat filter unit comprises a flow distributor and flow straightener. The flow distributor surrounds a filter septum and has openings through which liquid may flow. The proportion between the area of openings and the area of a wall of the flow distributor may vary along the length of the septum to distribute flow over the length of the filter septum in a predetermined manner. A flow straightener is provided at the base of the septum to reduce turbulence during precoat and filtration operations, and to reduce the occurrence of large flocs in precoat slurries during coating operations.

Abstract: The invention relates to an apparatus for separating contaminants comprising a tubular filter body (12) having an inner flow space (18) which is separated by a filter layer (14) from an outer flow space (20). The one end face of the filter body (12) is closed and the other end face comprises an opening. The inner flow space (18) has a substantially uniform cross-section over its entire axial length and is in flow communication on the one hand through the filter layer (14) with the outer flow space (20) and on the other hand through the end-face opening with an outside space. In the inner flow space (18) an element (30) is arranged for conducting the flow through the filter layer (14), which is characterized in that said element (30) for conducting the flow from or to the filter layer (14) is gradually tapered in its cross-section from the sealed end face (16) to the end-side opening (22) of the inner flow space (18).

Abstract: The element is disposed in a vessel receiving a fluid flow. The vessel wall is porous at least for a proportion of the fluid and bounds an inner chamber communicating through the vessel wall with a chamber outside the vessel. The element is in the shape of a plate or tube and is so devised that the porous wall either on its own or in combination with other similarly shaped elements to form a module, forms a turbulence generator particularly in the form of a static mixer for the fluid flow. The resulting turbulence on the wall of the elements ensures that the wall remains porous.

Abstract: A filter segment disc of a segment filter comprises a support and drainage plate with slots radiating from the filter hub toward the filter edge. The slots are preferably of arcuate plan form and configured to provide a substantially uniform fluid flow over the filtering medium of the filter segment, reduce residence time of filtrate in the filter, eliminate dead spots in the flow, and facilitate cleaning of permanent filters. A filter support spacer may be provided adjacent the filtering surface to aid in support and positive spacing of the disc in a filter stack of which the disc may be an element.

Abstract: A cell-type filter cartridge is disclosed having netting thereon, as well as a method for producing same. Briefly stated, the surface area of filter material exposed to unfiltered fluid has disposed thereon a netting thereby preventing flaking, cracking and the like of filter media during backflow or cleaning operations. The netting is secured to the cell by a molded circumferential retainer and a circumferential centrally disposed ring.

Abstract: A plate-type filter cartridge includes a plurality of stacked filtration units; each filtration unit having inner and outer rims, two filtration membranes bonded to opposite sides of the two rims, and a pair of netty members formed of fibrous material contacting a porous support and membranes. The support supports the membrane and is disposed between the membranes; the support being defined by a plurality of spokes and an outer rim.

Abstract: A filter unit using a bump-type filter is disclosed. Briefly stated, a chamber has a split fluid inlet conduit so that contaminated fluid, upon entering the chamber, is directed upwardly towards filter tubes and downwardly towards the bottom of the chamber. The fluid flow is diverted during startup so as to be directed only downward thereby enabling precoat of the filter element. Two tube sheets are utilized with incoming fluid in the vertically upward inlet conduit forcing incoming contaminated fluid to be deposited between the two tube sheets thereby. During operation contaminated fluid flows upwardly and downwardly towards the filter tubes so as to prevent disturbance of filter tubes as a result of turbulence in the chamber.

Abstract: A filter cartridge for removing particles of the order of submicrons from a solution, comprising at least two filtering films laid in parallel with the inner peripheral portions bonded fixedly to an inner rim of the core and with the outer peripheral portions joined together, thus defining a path of a solution to be filtered, and providing a relatively large effective filtering area.

Abstract: A mesh filter bag fits over a metal support. The bag has opposed edges longitudinally extending along one side of the mesh filtering bag from the bottom of the bag to the top of the bag. A rope extends from the filtering bag bottom along one opposed edge over the top and along the other opposed edge to the bottom. The opposed edges are held in sealing engagement by a tube.

Abstract: A multiple-disk type filter including a stack of filter disks disposed in a housing and an extensible support for external placement relative to the stack of filter disks, the extensible support including first and second base elements located externally of the stack and a multiplicity of externally located rod members joining the first and second base elements in sliding relationship, a first plurality of the rod members being fixedly attached to the first base element and being arranged for slidable supporting engagement with the second base element and a second plurality of the rod members being fixedly attached to the second base element and being arranged for slidable supporting engagement with the first base element, the rod members being disposed externally relative to the stack of filter disks.

Abstract: A filter leaf cleaning system for use in a suction-type filter apparatus having a tank to receive polluted liquids to be filtered or clarified includes a cleaning system header connected to a filtrate discharge conduit for diverting a portion of filtrate flow into the cleaning system, valve means connected to the cleaning system header for controlling filtrate flow into the cleaning system, a dispersing conduit connected to the cleaning system header adjacent a particulate-filtering surface of each filter leaf and having an opening for directing the filtrate flow across the particulate-filtering surface to flush particulates from the surface toward a solids collecting section of the tank housing the filter leaf. In addition, or in the alternative, the cleaning system may employ a membrane wiping member for sweeping movement across the particulate-filtering surface to brush residue or particulates from the surface.

Abstract: A filter apparatus is provided comprising a number of cylindrical candle filters, each of which contains a displacement body forming a space of uniform width between itself and the candle filter. The filter material of the candle filter is supported by a cylindrical supporting body which has passages through which a plastic melt to be filtered can flow. A number of filter apparatuses can be arranged on concentric circles on a cylindrical filter housing so as to minimize the dwelling time of the plastic melt flow through the filters and to minimize the pressure loss over the length of the filters.

Abstract: A reverse osmosis water purification module has an enclosed cylindrical housing in which at least twelve purification elements are mounted in a uniform, spaced parallel fashion. Each element consists of a long flat member having a thermoplastic sheet backing formed into a slightly curved cross section and having a semi-permeable membrane disposed thereon. The backing has three-dimensional porosity for purified water such that water passing through the membrane portion of the element travels along the backing member to an end. The ends of the module are mounted in a collection manifold which is sealed off from the remainder of the housing interior. A method of manufacturing the elements continuously is also provided wherein a continuous length of flexible backing material is fed sequentially through a heater, a forming die to impart a curved cross-section to the backing material, an extruder wherein membrane forming fluid is extruded around the periphery of the backing, a chill bath and a heating bath.

Abstract: A filter apparatus for removing plankton out of fresh or sea water containing the plankton. The filter apparatus comprises a filter housing provided with a partition plate having a plurality of through-holes thereby to partition the housing into a non-filtrate chamber and a filtrate chamber. A plurality of filter elements, each having open top end, a filter portion and non-filter portion, which are fitted in the through-holes of the partition plate to protrude the open top ends into the filtrate chamber. Plankton in the water are concentrated at the non-filter portion disposed near the partition plate and removed through an opening provided at a portion of the non-filtrate chamber near the partition plate.

Abstract: Filtration module formed by a stack of tubular membranes shaped as flat cases (1) 0.2 to 2 mm thick and intercalated drains (2) formed as a cloth or a lattice which leaves uncovered the end parts of the case, which are covered by tight and rigid tongues (3). The stack, sandwiched between two rigid plates (5) and integrally mounted to two end flanges (6, 7) which sealingly engage a tubular body, while providing input openings (71) and output openings for the product to be filtered and the filtered product, in parallel for all the cases. The plates provide a free space for the filtrate discharge between the stack and the body. The path length of the filtered product is between 10 and 50 cm and the discharge path length of the filtrate is between 3 and 10 cm.

Abstract: A filter element constructed of stainless steel. The element includes a pair of filter media concentrically disposed to receive parallel flow of the filtrant. The element is adapted for disassembly to remove the filter media. The various component parts of the filter element may thereafter be easily cleaned and the filter media replaced. The filter media after being removed may also be cleaned and reused if desired. The component parts include appropriate guard assemblies to protect the filter media during handling and use.

Abstract: The invention relates to a filter means for filtering gases, liquids or similar filtering media, preferably for process engineering plants, e.g. those for the foods and drinks industry, such as for compressed air preparation, particularly in sterile operation, optionally under overpressure conditions and/or at high temperatures, in which there is a segmental construction, formed by essentially circular filter elements, against which a flow can take place from the inside and outside, together with interposed, disk-shaped filter material and in which the entire edge area of the filter material sealingly cooperates with the filter elements.

Abstract: A polymer filtering apparatus (1) is used to filter a molten polymer in a step of extruding a molten polymer to manufacture films and fibers. A plate type filter medium (4), which is incapable of resisting a filtration pressure, is supported at its rear portion on a liquid-permeable support member (5). Two pieces of filter media (4), (4) of the above-mentioned construction are arranged in opposition to each other so as to form a polymer passage (10) therebetween, and a polymer to be filtered is fed from this polymer passage (10) and through the filter medium (4) and support member (5). The plate type filter medium (4) and support member (5), which are detachably piled, can be separated, and the surfaces thereof can be easily washed. Moreover, the results of washing of both the primary and secondary sides can be inspected visually with ease.

Abstract: Improved filter leaf assemblies are constructed from a pair of like grid-like filter media support panels mounted in spaced parallel relationship within a rigid rectangular peripheral frame. Sheets of filter media overlie the outer surfaces of the support panels and are fixedly sealed to the frame around the entire periphery of the panel. One side of the frame is fixedly mounted to an outlet pipe whose interior communicates with the space between the support panels via mating slots in the pipe wall and frame. Two filter media attachment arrangements and two frame to pipe mounting arrangements are disclosed.

Abstract: A filter (51) for liquids comprises a filter vat (52) having an inlet orifice (60) for the liquid to be filtered, an outlet orifice (58) for the filtrate, and an evacuation orifice (66) for solid particles, together with filter elements comprising filter medium cloths disposed vertically around filter leaves (18) inside said vat between said inlet and outlet orifices. Said cloths (12) are in the shape of elongate pockets (16) threaded freely over said leaves (18), said leaves being provided with longitudinal drainage channels (32), said pockets having openings (19) in communication with said outlet orifice (58), and said filter leaves (18) being suspended beneath supports (20) which are fixed inside said vat (52), with said leaves being free to rock sideways from their supports.

Abstract: A diatomaceous earth caking filter element includes a first elongated tubular manifold having a slot therein and a suction coupling formed thereon for drawing a liquid from said first manifold. A second elongated tubular manifold has a slot therein and a plurality of hollow pipes connected between the first and second manifolds with one end of each pipe extending into the first manifold through the slot therein and the other end of each pipe extending into the second manifold through the slot therein. Each pipe is held by the slot edges of each manifold extending into an annular groove on each end of each pipe. A filter cake screen covers both sides of the plurality of hollow pipes for catching a filtering medium, such as diatomaceous earth, thereon for filtering liquid passing therethrough, so the liquid can be drawn through the filter medium and filter screen into the first and second manifolds and out the suction coupling.

Abstract: A precision filter for accomplishing filtering of precision of submicron order. A filter element of the filter consists of a plurality of superposed disc-shaped annular support members for filter membranes. Each support member has a radially outwardly extending intermediate section located between an annular boss section and an outer frame section. The intermediate section is formed on its upper and lower sides with a plurality of gently winding elongate ridges and largely winding elongate ridges. Each largely winding elongate ridge extends from the boss section to the outer frame section, but each gently winding elongate ridge located between the two largely winding elongate ridges is separate from the boss section thereby to form two elongate winding grooves which are joined and continuous to a central opening of the boss section.

Abstract: A module comprising a plurality of members for obtaining a gas having a specified gas concentrated therein from a mixture of at least two gases, each of said members comprising (a) a solid support plate and (b) a composite film comprised of a porous sheet-like material and one or a plurality of ultrathin solid membranes supported on the porous sheet-like material with a thickness of about 50 to about 5000 .ANG..

Abstract: A membrane separation arrangement includes a plurality of plate modules adjacently arranged in a housing, the plate modules being formed by two separation membranes each, which are interconnected at their rim regions so as to be tight all around, inner spacers formed by a layer of fibrous material being provided between said separation membranes.To reliably obtain tightness of the individual plate modules, with no high forces required for tightness acting on the separation membranes, while allowing the separation membranes to move without becoming damaged, outer spacers contacting the separation membranes and formed by a layer of fibrous material, such as a woven fabric, a knitted fabric or a nonwoven fabric, of organic or inorganic fibres, are provided between the individual plate modules, and the individual plate modules are interconnected via connection pieces sealingly inserted in openings of the separation membranes.

Abstract: An improved triangular filter cartridge and apparatus is provided comprising a generally cylindrical vessel having a plurality of generally triangularly shaped filter cartridges disposed therein. Each triangular filter cartridge has one of its substantially flat sides slightly spaced apart from and in direct facing relationship with the inner surface of the vessel, whereby a greater number of triangular filter cartridges can be compactly disposed within said vessel to increase the filtration capacity thereof. Each filter cartridge includes a passage that is triangularly shaped in a plane perpendicular to the axial direction.

Abstract: A filter element for use in a filter apparatus comprises a plurality of cylindrical filter units coaxially aligned end-to-end to form an integral tubular structure, a top end cap and a bottom end cap on the upper opening and the lower opening, respectively, of said tubular structure, and a cylindrical displacement member disposed coaxially within the tubular structure with a small clearance therebetween.

Abstract: A filter apparatus for clarifying liquids or gases includes a tank having a rigid horizontally disposed tube sheet contained therein for supporting a plurality of elongate tube filter elements. Each tube filter has an enlarged hub at one end configured with an exterior annular beveled surface. The tube sheet has apertures through which the tube filters extend and each aperture is configured with an interior annular beveled surface serving to cooperate with the beveled surface of a tube filter and prevent its downward movement within the tank. A gasket is interposed between the beveled surfaces of the tube sheet aperture and tube filter, and pins extend at an angle through the tube sheet into the hub of each filter for securing the filters in compressed engagement with the gaskets. The arrangement of the beveled surfaces and pins is such that the filter tubes remain sealed to the tube sheet regardless of the effects of differing coefficients of thermal expansion as between the filter tubes and tube sheet.

Abstract: A filtration apparatus including a filtration module having an axially stacked plurality of filter membrane sheets with the module defining a stack of fluid flow chambers having multi-edged perimeters and disposed on opposite sides of and substantially coextensive with each membrane sheet. Also defined by the module are a plurality of feed passages communicating with alternating ones of the chambers adjacent first axially aligned edges thereof, a plurality of retentate passages communicating with the alternating chambers adjacent to second axially aligned edges thereof opposite to the first edges, and a plurality of filtrate passage means communicating with other ones of the chambers between the alternating ones thereof and with the filtrate passage means entering the other chambers adjacent to either the first or second aligned edges. Also included in the apparatus are a base frame and a pair of parallel plates supported by the frame and movable thereon relative to each other in directions normal thereto.

Abstract: An improved triangular filter cartridge and apparatus is provided comprising a generally cylindrical vessel having a plurality of generally triangularly shaped filter cartridges disposed therein. Each triangular filter cartridge has one of its substantially flat sides slightly spaced apart from and in direct facing relationship with the inner surface of the vessel, whereby a greater number of triangular filter cartridges can be compactly disposed within said vessel to increase the filtration capacity thereof.

Abstract: A rotatable filter assembly, primarily intended for separation of fibers from a fiber suspension, comprises a number of annular filter discs (3) formed by a plurality of filter elements (5). The filter discs are mounted on a horizontal drum rotatable in a container (1) and formed by axial discharge tubes (6) and transverse tubes (7) which communicate with the individual filter elements (5). A collecting hopper (8) extends into the drum through an open end of it. During at least part of the rotation of the drum, the interior of each filter element (5) is kept at a pressure lower than that prevailing at the outside of it. The filter assembly is characterized in that the axial discharge tubes (6), as seen in a cross-sectional view, are arranged in groups each comprising at least two tubes.

Abstract: The filtering column is of the type comprising a perforated hollow metal tubular body (11) around which is disposed a stack (20) of metal rings (27) having deformations forming spacing elements and defining therebetween filtering interstices. The rings (27) have an inside diameter exceeding the outside diameter of the tubular body (11) so as to define between the inner periphery of each ring and the outer periphery of the tubular body a limited radial clearance (26) which does not exceed the elastic limit of each individual ring. The rings (27) constitute a stack (20) retained axially on the hollow body (11) in an undetachable manner with an axial clearance exceeding the aforementioned radial clearance.

Abstract: A filter candle element which is mounted in depending manner in a pressure container has a support body and a filter tissue which covers the support body and has at least one impermeable portion so as to prevent the depositing of a continuous filter cake. Through provision of a plurality of impermeable portions, the filter cake is divided into several pieces which do not obstruct their removal. The impermeable portions are obtained by spraying of synthetic material onto the filter tissue. These filter candle elements are especially suitable for alluvial filters of large dimensions.

Abstract: A filter apparatus has a filter housing having suspended therein a filter element. The filter element includes a plurality of hollow threads made from a high molecular weight polymeric material. The threads are characterized by being porous and flexible as well as being closed at the bottom. The filter apparatus further has at least one baffle within the housing to cause turbulence in the liquid to filtered. The inside of each hollow thread is at a lower pressure than the liquid on the outside, so that the filtrate can enter through the porous membrane of the threads while leaving solid matter behind. The open tops of the threads are in communication with an opening in the filter housing through which filtrate, free of solid material, may be removed.

Abstract: The filter apparatus has a plurality of filter cylinders each formed of a plurality of filter elements and a blind cylinder is provided between a support plate for supporting the filter cylinders and the uppermost filter element of each filter cylinder, in order to prevent a liquid to be filtered from passing a region of each filter cylinder where the surface of the liquid is moved vertically.

Abstract: Disc-shaped filter element with a hollow boss member through which the filtrate is to be discharged, and which filter element is divided into sectors by means of radially extending flexible sealing members, along with sealing members and along the periphery of the element U shaped channels are formed, while each sector communicates with the boss member by means of filtrate outflow pipes extending along the radial sealing members and protuding into the boss member.

Abstract: A disc filter includes a plurality of rotatable, axially spaced, annular discs (9), which are adapted to be partially submerged in a liquid or suspension to be filtered. Each disc comprises a plurality of hollow filter elements (10), the interiors of which communicate with axial suction channels (13) arranged at or near the circumference of the annular discs for withdrawal of filtrate. A collecting funnel (14) is introduced through all discs (10) to receive particles or parts of filter cake falling therefrom. The axial suction channels (13) are provided with backflow barriers (15') adapted to prevent liquid flow from the suction channels (13) radially back into the filter elements when raised above the liquid surface.

Abstract: A filter membrane housed in a casing is a microporous membrane manufactured by the phase separation method and having a pore size of 0.1 to 0.8.mu., preferably 0.2 to 0.6.mu., and a thickness of 100 to 300.mu.. At least one membrane unit comprising of such a membrane covering a core material is arranged inside the casing to define a blood channel of 50 to 150.mu. channel thickness.

Abstract: An improved triangular filter cartridge and apparatus is provided comprising a generally cylindrical vessel having a plurality of generally triangularly shaped filter cartridges disposed therein. Each triangular filter cartridge has one of its substantially flat sides slightly spaced apart from and in direct facing relationship with the inner surface of the vessel, whereby a greater number of triangular filter cartridges can be compactly disposed within said vessel to increase the filtration capacity thereof.