Abstract: An electrodialysis cell includes a housing defining an internal chamber, a core positioned within the internal chamber, a first electrode positioned in the internal chamber adjacent the housing, a second electrode coupled to the core and spaced from the first electrode, and a membrane assembly positioned between the first and second electrodes in a spiral wound configuration. The housing includes an inlet end for receiving a feed fluid and an outlet end in fluid communication with the inlet end. The membrane assembly includes a plurality of ion exchange membranes spaced from each other to define a plurality of fluid channels between the inlet and outlet ends.

Abstract: A hysteroscopic fluid management system includes a saline source with an electrolyte concentration, at least one pressure mechanism for circulating saline to and from a targeted site and through a filter having filter characteristics back to the source, and a controller. The controller provides a saline inflow in a first flow path to the site and a saline outflow in a second flow path from the site through the filter and back to the source at a controlled flow rate. A diagnostic or therapeutic procedure is performed at the site in the presence of the saline. The filter characteristics and the controlled flow rate are selected to (1) cause substantially no change in the electrolyte concentration in the saline, (2) to prevent hemolysis of greater than 5% of filtered red blood cells exposed to the saline, and/or (3) to minimize effect on prothrombin time of plasma exposed to the filter.

Abstract: An apparatus and a method are provided for a heating, ventilation, and air conditioning (HVAC) air filter to remove airborne molecular contaminants and volatile organic compounds (VOCs) from air within building spaces is disclosed. The air filter comprises a support frame having a shape and size suitable to orient the air filter within a HVAC system. A compound filter medium is retained within the support frame to remove the airborne molecular contaminants and VOCs from air flowing through the HVAC system. A method of removing airborne molecular contaminants and volatile organic compounds (VOCs) from air is disclosed that includes an operation of coupling a first media layer, comprising uniformly disposed pleats, with a second media layer, comprising a woven fiber material, so as to form a compound filter medium.

Abstract: The invention relates to a filter with a gasket applied in line shape at an edge of the filter. The invention suggests to apply the gasket with a nozzle which facilitates a gasket that is thinner and/or whose protrusion beyond the filter is lower than this would be feasible for example through injection molding.

Abstract: A cell separation chip for separating cells from a solution containing the cells includes an upper plate, a membrane positioned on a predetermined region of the upper plate, and an absorption device positioned at a lower end of the upper plate so as to absorb a solution which has penetrated the membrane from the solution containing the cells. There is an effect of effectively collecting/separating only cells in a solution by absorbing the solution containing the cells without the need of applying and maintaining additional external voltage.

Abstract: Elastic microfiltration membranes are provided. These membranes may be used in a membrane bioreactor. Due to the elastic nature of the membranes, removal of fouling materials is improved, thereby increasing the efficiency and longevity of the membranes. Methods for forming such membranes and uses of the membranes are also provided, including their use in membrane bioreactors.

Abstract: The invention relates to a system for administering drug to a Parkinson's disease patient comprising (a) a drug; (b) a storing bag for the drug; (c) a pump for administering the drug; (d) a pump controller for controlling the pump activity, the pump controller having access to a correlation of a first parameter tx and a second parameter At, and to the current first parameter tx, wherein the first parameter tx is correlated with a certain activity of the patient and the second parameter At is correlated with a dosage of the drug and the pump controller controls the pump activity in dependence of the first parameter tx and the correlation, and/or wherein the system comprises (e) a storing hag the drug suitable for pre-filling and long-term oxidations-free storage having a multi layer wall with the internal layer made of EVA or cyclic polyolefines and at least one further layer made of EVOH.

Abstract: A hysteroscopic fluid management system includes a saline source with an electrolyte concentration, at least one pressure mechanism for circulating saline to and from a targeted site and through a filter having filter characteristics back to the source, and a controller. The controller provides a saline inflow in a first flow path to the site and a saline outflow in a second flow path from the site through the filter and back to the source at a controlled flow rate. A diagnostic or therapeutic procedure is performed at the site in the presence of the saline. The filter characteristics and the controlled flow rate are selected to (1) cause substantially no change in the electrolyte concentration in the saline, (2) to prevent hemolysis of greater than 5% of filtered red blood cells exposed to the saline, and/or (3) to minimize effect on prothrombin time of plasma exposed to the filter.

Abstract: According to the present disclosure, arrangements, systems, components, features and methods for separating hydrophobic fluid such as oil entrained as aerosols from gas streams, such as crankcase ventilation gas streams are described. The components specifically described include a filter cartridge with preferred features for interaction with a filter housing, and a filter housing with preferred features for convenient installation. Methods of assembly and use are also characterized.

Abstract: A method for forming a nanopore membrane includes forming an array of carbon nanotubes on a substrate that are disposed side by side in a direction perpendicular to a length of the carbon nanotubes. The array of carbon nanotubes are embedded in a patternable polymer material. The patternable polymer material is crosslinked over the array of carbon nanotubes. An adhesive layer is deposited on the polymer material having the array of carbon nanotubes to form a pad. The pad is rolled using a transfer rod to form a membrane with carbon nanotubes of the array, forming nanopores through the membrane such that as the pad is rolled the membrane increases in diameter.

Abstract: A support structure (16) for a filter element, comprising at least one surface part (10), in which one or more fluid passage openings (12a-12e) with predetermined opening cross-sections are formed, is characterized in that the opening cross-section of at least one fluid passage opening (12a-12e) is at least partially elliptical-shaped.

Abstract: An end member (3A) for a spiral separation membrane element includes: an inner annular portion (31); an outer annular portion (32) surrounding the inner annular portion (31) at a distance from the inner annular portion (31); a plurality of connecting portions (33) connecting the inner annular portion (31) and the outer annular portion (32); and a shield plate (34) disposed between at least one pair of the connecting portions (33) and forming an opening (41) between the shield plate (34) and the outer annular portion (32). According to this configuration, a radially outwardly spreading flow is formed by the shield plate (34), and therefore suspended solids in a feed liquid can be effectively directed to the peripheral region.

Abstract: Disclosed are an edge member for membrane elements that can effectively improve adhesion with exterior finishing materials, and a membrane element that is equipped with the same. A plurality of types of undulations (134, 135) of different shapes are formed on the circumference of an extension (132) that extends from the main body (131) of an anti-telescoping member (edge member for membrane element) (13) toward a membrane roll body (11), and an exterior finishing material is attached to extend across the circumference of the extension (132) and the circumference of the membrane roll body. The adhesion between the anti-telescoping member (13) and the exterior finishing material can thus be effectively improved, since the exterior finishing material can be attached to the circumference of the extension (132) with the plurality of types of undulations (134, 135) in contact with the exterior finishing material.

Abstract: A filter module is formed of wound filter material having openings wherein the boundary surfaces of the openings constitute flow-through surfaces. The openings of the wound layers of the filter material form channels angled relative to the winding axis, wherein one group thereof opens at the outer peripheral surface of the roll and the other group opens at the inner peripheral surface of the roll and wherein the channels on the other end, respectively, are closed and wherein the channels, angled relative to the winding axis, are separated from one another by filter material, and wherein the inner area of the roll has a central channel arranged around a winding axis.

Abstract: Molecular filters are disclosed herein. An example of the molecular filter includes a rolled substrate having an interior surface and opposed ends that are substantially orthogonal to the interior surface. The rolled substrate defines a layer and a fluid flow path extending from one of the opposed ends to another of the opposed ends. A template is positioned on the interior surface of the rolled substrate. The template includes a matrix, and molecule template locations formed in the matrix.

Abstract: Filters are disclosed in the form of a helical or spiral element operable to be contained in a pipe fitting, or device to be protected, such as a valve, sprinkler or the like. Filters including devices for adjusting the pitch of the filter and devices for clearing clogs in the filter are disclosed. Plumbing fixtures including a filter element are disclosed as well as devices for adjusting the pitch of the filter and devices for clearing clogs in the filter.

Abstract: The filter is made of a flat wire with a generally rectangular cross section that has two long sides and two short sides. The flat wire is formed into a generally cylindrical helix defined by successive loops of wire stacked adjacent to one another. For any two successive wire loops, the long sides of the wire loop are set at a predetermined distance from the long side of an adjacent wire loop. Additionally, the short sides of successive wire loops are substantially aligned.

Abstract: Described are wrapped fluid treatment elements, comprising: a composite material; an interleaf; and an inner core; wherein the composite material and the interleaf form layers wrapped around the inner core. The composite material and interleaf may be wrapped in a spiral configuration around the inner core. The invention also relates to a method of separating a substance from a fluid, comprising the step of placing the fluid in contact with an inventive device or element, thereby adsorbing or absorbing the substance to the composite material contained therein.

Abstract: The invention relates to a module for processing a fluid having a body of wound layers of a sheet material, the body having inner and outer surfaces, first and second end faces and a passage extending along the winding axis of said body in fluid communication with the inner surface, the sheet material having openings forming at least three types of channels, the channels extending from the inner surface to the outer surface, a first type of channel being open at the outer surface of the body and closed at the other end, a second type of channel being open at the inner surface of the body, in fluid communication with said passage and closed at the other end, a third type of channel being closed at both ends thereof and positioned such as to receive fluid from one or more channels of the first or second type.

Abstract: The present invention relates to a filter module comprising a body of wound layers of sheet material, with an inner and outer peripheral surface, a winding axis and a passage within the body, the sheet material having a plurality of openings forming at least two types of channels within the wound layers, the channels extending in a direction from the inner peripheral surface to the outer peripheral surface, a first type of channels in fluid communication with the outer periphery and closed at the end toward the inner periphery, a second type of channels in fluid communication with the inner periphery and closed at the end toward the outer periphery, the two types of channels separated by portions of sheet material, one of the types of channels being outlet channels and being covered by a filter material.

Abstract: A filter module comprises a body of wound layers of sheet material, said body having inner and outer peripheral surfaces and a winding axis and a passage extending along the winding axis and in fluid communication with the inner peripheral surface, the sheet material having openings forming two channel types extending from the inner to the outer peripheral surfaces, a first channel type open at the outer peripheral surface and closed adjacent to the inner peripheral surface, a second channel type open at the inner peripheral surface, in fluid communication with the passage and closed adjacent to the outer peripheral surface, the two channel types separated from each other by sheet material, one channel type communicating with a module port, the other channel type communicating with another module port, wherein a majority of openings forming the inlet channels incompletely register with corresponding openings of an adjacent layer.

Abstract: A filter module comprises a body of wound layers of a sheet material, said body having inner and outer peripheral surfaces, a winding axis and a passage along the winding axis and in fluid communication with the inner peripheral surface, the sheet material having openings forming two channel types from the inner to the outer peripheral surfaces, a first channel type open at the outer peripheral surface and closed adjacent to the inner peripheral surface, a second channel type open at the inner peripheral surface, in fluid communication with the passage and closed adjacent to the outer peripheral surface, the two channel types separated from each other by sheet material, one channel type being inlet channels communicating with an inlet, the other channel type being outlet channels communicating with an outlet, the edge of the inlet channel openings having a thickness less than the thickness remote from those openings.

Abstract: A filter module is formed of wound filter material having openings wherein the boundary surfaces of the openings constitute flow-through surfaces. The openings of the wound layers of the filter material form channels angled relative to the winding axis, wherein one group thereof opens at the outer peripheral surface of the roll and the other group opens at the inner peripheral surface of the roll and wherein the channels on the other end, respectively, are closed and wherein the channels, angled relative to the winding axis, are separated from one another by filter material, and wherein the inner area of the roll has a central channel arranged around a winding axis.

Abstract: Vacuum cleaner filters, in particular replaceable vacuum cleaner filters suitable for both dry and wet/dry type vacuum cleaners are disclosed, as well as systems incorporating the use of such filters and methods for their use. The filters include a plurality of adjacently positioned pleats arranged in a closed circumferential, cylindrically-shaped path, a top end cap having a central orifice capable of constricting a post on a vacuum filter cage, and optionally a molded end ring oppositely-spaced from the top end cap for engagement with the motor housing of a vacuum cleaner.

Abstract: An improved method of fabricating a spiral wound module seals a juncture between each scroll face, preferably a smooth, trimmed scroll face, and a central permeate tube. The tube is generally perpendicular to the scroll face. Modules produced using the improved method have fewer insertion point leaks than those produced without using the improved method.

Abstract: A filter module comprises a body of wound layers of sheet material, the body having inner and outer peripheral surfaces, a winding axis and a passage extending along the axis and in fluid communication with the inner peripheral surface, the sheet material having openings forming two channel types extending from the inner to the outer peripheral surfaces, a first channel type open at the outer peripheral surface and closed adjacent to the inner peripheral surface, a second channel type open at the inner peripheral surface, in fluid communication with the passage and closed adjacent to the outer peripheral surface, the two channel types separated from each other by sheet material, one channel types being inlet channels communicating with a fluid inlet, the other channel types being outlet channels communicating with a fluid outlet, wherein the surface of at least one channel type supports a precoat.

Abstract: Disclosed are an edge member for membrane elements that can effectively improve adhesion with exterior finishing materials, and a membrane element that is equipped with the same. A plurality of types of undulations (134, 135) of different shapes are formed on the circumference of an extension (132) that extends from the main body (131) of an anti-telescoping member (edge member for membrane element) (13) toward a membrane roll body (11), and an exterior finishing material is attached to extend across the circumference of the extension (132) and the circumference of the membrane roll body. The adhesion between the anti-telescoping member (13) and the exterior finishing material can thus be effectively improved, since the exterior finishing material can be attached to the circumference of the extension (132) with the plurality of types of undulations (134, 135) in contact with the exterior finishing material.

Abstract: A fluid separation element is provided including: a membrane winding having two ends and obtained by layering a separation membrane, a feed water channel material, and a permeate channel material and spirally winding them; and one or more anti-telescoping devices attached to one or both of the ends of the membrane winding, wherein a brine seal fitting groove is provided in an outer circumferential surface of the anti-telescoping device and a hole that communicates with a feed water channel side is provided inside the groove. When the anti-telescoping devices are attached to the both ends of the membrane winding, a brine seal is fitted into the groove of the upstream-side anti-telescoping device and no brine seal is fitted into the groove of the downstream-side anti-telescoping device.

Abstract: A filter assembly includes a filtering screen having a top surface and a bottom surface. A skeletal structure is attached to the filtering screen and has a top surface and a bottom surface. The bottom surface of the filtering screen contacts the top surface of the skeletal structure. The skeletal structure forms a plurality of downward extending channels.

Abstract: A support structure of a filter element for supporting a filter material that is adapted to filter a fluid includes a first frame portion and a second frame portion. The first frame portion has a plurality of radially-extending fingers that are longitudinally spaced from one another. The first frame portion is disposed entirely on an unfiltered side of the filter material. A second frame portion has a pair of longitudinally-extending support surfaces that are disposed in a spaced, facing relationship with respect to one another. The second frame portion is disposed entirely on a filtered side of the filter material. The radially-extending fingers of the first frame portion and each of the longitudinally-extending support surfaces of the second frame portion support the filter material to define a first radial channel. The radially-extending fingers of the first frame portion space the longitudinally-extending support surfaces of the second frame portion apart from one another.

Abstract: The present invention provides a filter module comprising a body of wound layers of a sheet material, said body having an inner and an outer peripheral surface, a winding axis and a passage extending along the winding axis of said body and in fluid communication with said inner peripheral surface, said sheet material having a plurality of openings formed therein, said openings forming two types of channels within the wound layers of sheet material of said body, said channels extending in a direction from the inner peripheral surface to the outer peripheral surface, a first type of channels being open at one end at said outer peripheral surface of the body and closed at the other end located adjacent to said inner peripheral surface, a second type of channels being open at one end at said inner peripheral surface of the body, in fluid communication with said passage and closed at the other end located adjacent to said outer peripheral surface, said channels of the one type being separated from the channels of

Abstract: Disclosed herein are modular filter assemblies having a plurality of stacked filter plates formed from a porous material. The filter plate can comprise a planar base portion from which a convoluted ridge wall, having a ridge outer side surface, a ridge inner surface, and a top ridge surface extends. A plurality of fluid inlet troughs and a plurality if fluid outlet troughs are defined by the ridge wall. Adjoining filter plates form a plurality of fluid inlet cavities defined by the fluid inlet trough of one filter plate and a portion of the bottom surface of the adjoining filter plate; and a plurality of fluid outlet cavities defined by the fluid outlet trough of the one filter plate and a portion of the bottom surface of the adjoining filter plate. In use, the plurality of fluid inlet cavities are in filtered communication with the plurality of fluid outlet cavities.

Abstract: A filter module comprises a body of wound layers of a sheet material, said body having inner and outer peripheral surfaces, a winding axis and a passage along the winding axis and in fluid communication with the inner peripheral surface, the sheet material having openings forming two channel types from the inner to the outer peripheral surfaces, a first channel type open at the outer peripheral surface and closed adjacent to the inner peripheral surface, a second channel type open at the inner peripheral surface, in fluid communication with the passage and closed adjacent to the outer peripheral surface, the two channel types separated from each other by sheet material, one channel type being inlet channels communicating with an inlet, the other channel type being outlet channels communicating with an outlet, the edge of the inlet channel openings having a thickness less than the thickness remote from those openings.

Abstract: A feed side passage material is provided in which sufficient antibacterial activity is obtained even in the spaces among constituent yarns and which hence can effectively prevent biofouling. Also provided is a spiral separation-membrane element employing the feed side passage material. The feed side passage material, which is for use in a spiral separation-membrane element, is a feed side passage material in a net form constituted of yarns (1 and 2) containing a chlorophenol compound antibacterial. The spiral separation-membrane element comprises a perforated hollow core tube and, wound therearound, one or more separation membranes, one or more feed side passage materials, and one or more permeate side passage materials. The element is characterized in that the feed side passage materials each is said feed side passage material.

Abstract: The present invention provides one or more reinforcing members configured to act together with the adhesive bonding between filter media layers to further resist axial deformation forces such as induced by fluid flowing through the filter and thereby acting to retain the structural form and integrity of the filter element. Also disclosed is a method of reinforcing layers of a multilayer axial filter element against displacement of the layers.

Abstract: An improved method of fabricating a spiral wound module seals a juncture between each scroll face, preferably a smooth, trimmed scroll face, and a central permeate tube. The tube is generally perpendicular to the scroll face. Modules produced using the improved method have fewer insertion point leaks than those produced without using the improved method. Fast curable cyanoacrylate adhesive is used preferably.

Abstract: The present invention provides a filter module comprising a body of wound layers of a sheet material, said sheet material having a plurality of openings formed therein, said channels within the wound layers of sheet material of said body, said channels extending in a direction from the inner peripheral surface to the outer peripheral surface, a first type of channels being open at one end at said outer peripheral surface of the body and closed at the other end located adjacent to said inner peripheral surface, a second type of channels being open at one end at said inner peripheral surface of the body and closed at the other end located adjacent to said outer peripheral surface, said channels of the one type being separated from the channels of the other type by portions of sheet material wherein a majority of the openings of a layer of sheet material forming the inlet channels incompletely register with corresponding openings of an adjacent layer and a process for manufacture such filter module.

Abstract: The present invention provides a filter module comprising a body of wound layers of a sheet material, said sheet material having a plurality of openings formed therein, said openings forming two types of channels within the wound layers of sheet material of said body, said channels extending in a direction from the inner peripheral surface to the outer peripheral surface, a first type of channels being open at one end at said outer peripheral surface of the body and closed at the other end located adjacent to said inner peripheral surface, a second type of channels being open at one end at said inner peripheral surface of the body, and closed at the other end located adjacent to said outer peripheral surface, said channels of the one type being separated from the channels of the other type by portions of sheet material, wherein the surface of at least one type of the channels supports a precoat and a process for the manufacturing of such a filter module.

Abstract: The present invention relates to a filter module comprising a body of wound layers of a sheet material, said sheet material having a plurality of openings formed therein, said openings forming two types of channels within the wound layers of sheet material of said body, said channels extending in a direction from the inner peripheral surface to the outer peripheral surface, a first type of channels being open at one end at said outer peripheral surface of the body and closed at the other end located adjacent to said inner peripheral surface, a second type of channels being open at one end at said inner peripheral surface of the body, and closed at the other end located adjacent to said outer peripheral surface, said channels of the one type being separated from the channels of the other type by portions of sheet material, wherein the sheet material has areas at the edge of the openings forming the inlet channels the thickness of which being smaller than the thickness of the sheet material remote from those op

Abstract: An improved method of fabricating a spiral wound module seals a juncture between each scroll face, preferably a smooth, trimmed scroll face, and a central permeate tube. The tube is generally perpendicular to the scroll face. Modules produced using the improved method have fewer insertion point leaks than those produced without using the improved method. Fast curable cyanoacrylate adhesive is used preferably.

Abstract: Fluid treatment arrangements and elements and methods for making and using fluid treatment arrangements and elements are disclosed. A ribbon including a permeable fluid treatment medium may be spirally wound in a plurality of windings to form a fluid treatment element having a disk-shaped body. The disk-shaped body may have first and second opposite end surfaces, e.g., an inflow surface and an outflow surface, and an outer rim. One or both of the end surfaces may be an uneven surface. At least two and as many as many as fifty or more fluid treatment elements may be positioned along a hollow core assembly. Fluid may be directed to or from the interior of the core assembly through each fluid treatment element. In each fluid treatment element, fluid flows from the inflow surface to the outflow surface generally edgewise through the permeable fluid treatment medium.

Abstract: A fluid filter is preferably constructed from a relatively thick batting of high loft, non-woven, fluid permeable fibrous material. The filter batting is then passed through a manufacturing device, which slices the batting in the vertical as to create two continuous filter batts from the parent filter batt. The slicing also creates a relatively deep V-shaped zig zag or waveform pattern in the anterior filter surfaces of the top and bottom of the batt. The top half deep V-shaped zigzag patterns peaks and valleys correspond or line up with the bottom half's valleys and peaks since the waveform landscape of the first child batt is essentially a negative impression of the second child batt. Accordingly, the patterns nest within one another. When separated, the two children batts each comprise a waveform landscape for dynamically directing fluid streams from the anterior filter surface to the posterior filter surface.

Abstract: A large vault or tank receives the runoff water to be cleaned. There are one or more small tanks in the large tank (vault). Each small tank is inverted and receives water at its open lower end, from the large tank. The water entering the small tank rises, as the water level in the large tank rises, and flows upward through a filter. When the water level rises above the top of the filter it enters an outlet tube or pipe and then flows downwardly along the center-line of the filter. A float, a valve and a check valve may cause the system to function as a siphon and feed the filtered clean water to an outlet. Alternatively the siphoning effect will occur if the inside diameter of said outlet tube is small enough to form a partial vacuum.

Abstract: A filter element, especially for filtering intake air for an internal combustion engine, which filter element is composed of a coiled filter, through which a flow of air passes axially, and which has an annular gasket on at least one end face, the annular gasket being connected to the filter element by a welded, glued, extruded or fused connection, such that the annular gasket is inserted into a suitably constructed receptacle in a filter housing and radially and/or axially positions the coiled filter. The annular gasket is arranged directly on the end face of the coiled filter and is pressed axially and/or radially into the receptacle of the housing.

Abstract: The present invention relates to a module for processing a fluid comprising a body of wound layers of a sheet material, said body having an inner and an outer peripheral surface, a first and a second end face and a passage extending along the winding axis of said body and in fluid communication with said inner peripheral surface, said sheet material having a plurality of openings formed therein, said openings forming at least three types of channels within the wound layers of sheet material of said body, said channels extending in a direction from the inner peripheral surface to the outer peripheral surface, a first type of channel(s) being open at one end at said outer peripheral surface of the body and closed at the other end located adjacent to said inner peripheral surface, a second type of channel(s) being open at one end at said inner peripheral surface of the body, in fluid communication with said passage and closed at the other end located adjacent to said outer peripheral surface, a third type of cha

Abstract: The present invention provides one or more reinforcing members configured to act together with the adhesive bonding between filter media layers to further resist axial deformation forces such as induced by fluid flowing through the filter and thereby acting to retain the structural form and integrity of the filter element. Also disclosed is a method of reinforcing layers of a multilayer axial filter element against displacement of the layers.

Abstract: A filter media, in particular a separation module, characterized by a flow control strip (40) circumferentially surrounding the media at one end of the filter media, in particular a spiral wound membrane material, which strip extends only a relatively short distance (D) along the length of the filter media. The strip preferably is an open mesh material that cooperates with an overlapping portion of an open mesh net that surrounds the filter media over essentially the entire axial length of the media, to provide for controlled bypass flow through the overlapped strip and net while still enabling easy assembly of the filter media and surrounding net into a housing. The strip of material allows the filter media, such as a spiral wound membrane module, to be “sized” at one end of the membrane module for creating a compressible area that restricts bypass flow while allowing for easy installation and removal of the membrane module.

Abstract: A membrane element sealing material holding member that even when the dimension of outer diameter of center tube varies, enables holding of the center tube in the center and further enables easy insertion of the center tube; and a membrane element utilizing the same.

Abstract: A corrugated web having tapered flutes is usable in straight-through flow filter elements. The corrugated web can be made by passage between a pair of corrugated rollers having tapered teeth. Methods of making usable corrugated rollers include methods for generating the tapered teeth at the end points and the extension between the end points. Corrugated webs may be made from a variety of media, including certain media that stretches in the machine direction. Methods of forming the corrugated web into filter elements (e.g., air filter elements) includes forming filter media by securing a flat sheet to the corrugated web. The filter media may then be wound into a filter element, including application of sealant during the winding process to close selected flutes.

Abstract: The present invention provides a filter module comprising a body of wound layers of a sheet material, said sheet material having a plurality of openings formed therein, said openings forming two types of channels within the wound layers of sheet material of said body, said channels extending in a direction from the inner peripheral surface to the outer peripheral surface, a first type of channels being open at one end at said outer peripheral surface of the body and closed at the other end located adjacent to said inner peripheral surface, a second type of channels being open at one end at said inner peripheral surface of the body, and closed at the other end located adjacent to said outer peripheral surface, said channels of the one type being separated from the channels of the other type by portions of sheet material, wherein the surface of at least one type of the channels supports a precoat and a process for the manufacturing of such a filter module.