Abstract: A method for preparing a spiral wound filtration module is provided. The module has a central permeate carrier tube. The method includes winding at least one filtration leaf about the permeate carrier tube. The filtration leaf includes a first membrane sheet, a permeate carrier sheet, and a second membrane sheet. The winding step creates an end face extending radially outwardly from the permeate tube on each end thereof. After winding, the filtration module is maintained in a wound state. An adhesive is then supplied to each end face and a vacuum is applied through each of the permeate tube. While the vacuum is applied, the permeate tube and filtration leaf assembly are spun in a centrifuge until the adhesive has solidified. After spinning, each end face of the module is severed at a distance between the level of adhesive along the feed spacer screen and the level of adhesive along the permeate carrier sheet.

Abstract: A radially wound tubular fiber disk comprises a single strand of tubular fiber having a feed inlet at one end and a feed outlet at the other. Radially arranged adhesive strips forming seams maintain a desired spacing between adjacent convolutions of the tubular fiber disk and hold the disk in place.

Abstract: The present invention proposes light-weight and easy-to-handled deodorizing material that has a large contact area with bad smell-causing gas as well as better deodorizing performance and also that enjoys a smooth circulation of that gas with a lower permeation resistance. A single-faced corrugated fiberboard made of a cellulose-based substance is allowed to contain ferrous sulfate, which is subsequently oxidized into basic ferric sulfate.

Abstract: Negligible pressure drop absorber has a hollow housing having an entrance opening and an exit opening, and an absorber unit including a plurality of layers of an absorbent material arranged substantially parallel with one another to form a passageway for a gaseous stream, through which the gaseous stream is adapted to travel and by which gaseous liquid and liquid droplets are absorbed from the gaseous stream with a negligible drop in pressure. In particular, in the testing of engine oils with a Noack-type teat device, added collection by absorbing drawn over sample is accomplished, with the ability to evaluate that sample, and without incurring a pressure drop in the system adverse thereto.

Abstract: A radial air filter is pleated in the horizontal direction rather than the vertical direction so as to have increased capacity and efficiency with reduced air flow restriction. Preferably, the pleats have a parabolic cross section wherein the panels of the pleats form legs of parabolas with the legs being joined by arcuate peaks and valleys.

Abstract: A separation process comprises passing a gas or vapor stream contaminated with an undesired substance or contaminant downwardly through a plurality of spiral separating media such that the direction of movement of the gas or vapor stream is transversely the longitudinal axes of at least some of the spiral separating media. The undesired substance or contaminant is allowed to separate from the gas or vapor as it passes through the bed, and purified gas or vapor is withdrawn from the bed.

Abstract: A spiral fixed-bed module used to provide contact and interaction between a fluid stream and solid particles, comprises a fluid distribution element formed by a pair of laterally coextensive envelope-like fluid communication channels being spirally wound into a cylindrical structure with adjacent layers spaced apart forming spiral loops of spaces of uniform width. The element is then disposed in a cylindrical casing, and immobilized therein by packing solid particles into the spaces between the layers of the spiral channels, and the spaces between external surfaces of the element and inner surfaces of the casing. A fluid stream introduced into a first of the channels will be directed to flow through the solid particle layers via the porous side walls of the distribution channels, and exit from the second channel. The module packed with adsorbent particles provides a thin-bed adsorber, and can use very small adsorbent particles for efficient adsorption without giving rise to high pressure drop.

Abstract: A particulate trap for use in a diesel engine which is inexpensive, and which is high in particulate trapping efficiency, regeneration properties and durability, and low in pressure loss due to particulates trapped. An even number of flat filters made from a non-woven fabric of heat-resistant metallic fiber are laminated alternately with the same number of corrugated sheets made of a heat-resistant metal. The laminate thus formed are rolled into a columnar shape. Each space between the adjacent flat filters in which every other corrugated sheet is inserted is closed at one end of the filter element by a closure member. The other spaces between the adjacent flat filters are closed at the other end of the filter element.

Abstract: A separation process comprises passing a gas or vapor stream contaminated with an undesired substance or contaminant downwardly through a bed of curled separating media. The undesired substance or contaminant is allowed to separate from the gas or vapor as it passes through the bed. Purified gas or vapor is withdrawn from the bed.

Abstract: A conical filter device inserts into a duct having flow passing from upstream to downstream. The filter device includes fluted filter media having flutes formed therein and a housing. The filter forms a seal between the outer edge of the filter at the downstream side and the housing. The upstream face of the filter is conical shaped in a first embodiment and frusto-conical in a second embodiment with the housing roughly corresponding to the shape of the filter. The filter elements are formed by winding layers of filter media to form a circular cross-section. The elements are moved axially as they are wound or placed on a shaping form while the sealant is still pliable to shape the element.

Abstract: An extruded honeycomb body of a ceramic or metallic material includes a plurality of conduits being separated from each other by partitions and extending approximately parallel to each other. The partitions are disposed and shaped in at least an outer region in such a way that as seen in a cross section through the honeycomb body they do not form structures which are rigid in the radial direction and/or rigid support structures extending in the circumferential direction. Separating walls extending spirally or involute particularly increase the elasticity of a honeycomb body. Such shapes are particularly suited for electrically conductive extruded honeycomb bodies which can be used, for example, in connection with electrically heatable catalytic converters of motor vehicles.

Abstract: A mixture of liquid particles dispersed in a fluid is introduced into an upright cylindrical separator at one end of an involute channel formed therein by a coaxial spiral partition of fibrous material to flow continuously under near plug-like flow conditions in an involutional or evolutional direction. The centrifugal force of the fluid in the channel causes the particles to impinge the fibrous material, separate from the fluid, and form films of the liquid which drains by gravity to a collection at the bottom of the separator.

Abstract: A filter is provided. The filter includes a first layer of a non-blocking screen and a second layer of the non-blocking screen disposed against and in direct contact with the first layer, said first and second layers together forming a filter.

Abstract: A method of manufacture of a radial-flow filter particularly suitable for use as an input filter in a subterranean fluid (oil, gas, water) well starts with a length L of multi-perforate pipe, which may be an integral part of the production tubing of the well. The pipe is mounted in an engine lathe with the perforated length L between the headstock and the tailstock of the lathe. With the pipe rotating, a strip of metal wool, preferably stainless steel wool, is wrapped around the pipe in repeated, overlapping helical layers each aligned at an acute angle X to the pipe axis, with adjacent layers angularly displaced by an angle 2X. The completed filter may have a tubular wire mesh around the pipe, between the pipe and the innermost layer of steel wool, and a multi-perforate sheath over the outermost layer of wool.

Abstract: A filter including a first flow path having a plurality of interconnected channels and a second flow path having a plurality of interconnected channels. The channels of the first and second flow paths are alternatingly configured in a substantially concentric pattern. A filter media is interposed between the channels of the first and second flow paths. A filter including a filter media arranged in a plurality of substantially concentric layers; a fluid outflow system contacting the entirety of one side of the filter media, and a fluid inflow system contacting the entirety of an opposite side of the filter media.

Abstract: An insert for air flow ducts includes a band (10) of a semi-stiff, although flexible character, a plurality of interspaced interflanges (11) along the band and spaced edge flanges (14) which are connected with the interflanges, the interflanges in pairs together with the band (10) and the edge flanges (14) delimiting consecutive cavities or pipes (12') along the band, the opposed ends of the cavities or pipes being open, the band being formed into a loop in which the band and the edge flanges are located tightly adjacent to each other and in which the pipes (12') are substantially evenly distributed.

Abstract: A particle separating arrangement includes a filter tube (1) that is made of electrostatically chargeable fibres, for instance electrete fibres, and through which an axial air stream can pass radially in a direction from within outwardly. Within the tube (1) an insert (2) is placed, including a carrier (3) which extends transversely to the tube, the carrier having a plurality of strip elements (4) arranged to be set in motion by the passing air stream and thereby be rubbed against each other in order to produce an electrostatically charged field in their environs. This field is used to automatically and continuously keep the chargeable fibres in the filter tube wall (1) electrostatically charged.

Abstract: A method of manufacture of a long radial-flow filter particularly suitable for use as an input filter in a subterranean fluid (oil, gas, water) well starts with a length of multi-perforate pipe, which may be an integral part of the well 's production tubing. The pipe is mounted in an engine lathe with the perforated length between the headstock and the tailstock of the lathe. With the pipe rotating, a strip of metal (steel) wool is wrapped around the pipe in repeated, overlapping helical layers each aligned at an acute angle X to the pipe axis, with adjacent layers angularly displaced by 2X. The completed filter has a tubular wire mesh around the pipe, between the pipe and the innermost layer of steel wool, and a multi-perforate sheath over the outermost layer of wool.

Abstract: An efficient, light-weight airbag inflation filter includes a gas-permeable, substantially rigid support tube having a plurality of uniform perforations therethrough. A filtering element formed from a continuous inorganic ceramic yarn or roving is helically cross-wound around the support tube to form one or more layers covering the perforations of the support tube. A wire screen, having openings therethrough smaller than the perforations in the support tube, is disposed between the filtering element and the support tube to act as a gas diffusion layer for the gases passing through the inflation filter.

Abstract: An improved method for fabricating a filter for use in automotive air bag inflators which comprises forming a hollow cylindrical inner core or combustion screen of filter material and outer filter layers wound outward from the surface of the core so as to be maintained in cylindrical relation thereabout. This invention is specifically directed to an improved filter which does not include a perforated support tube and relies on only the interior combustion screen for support in the final wrapping of the remaining filter structure.

Abstract: A filter (20) for use in an inflator assembly (10) is formed by combining a layer of filter media (22) with a barrier element such as metal foil sheet backing (24), and then subsequently wrapping the filter a plurality of times about a combustion chamber (16) located within the inflator assembly (10). The foil sheet backing (24) creates a barrier which causes the inflation gases to travel in a helical path about the combustion chamber (16). By providing a helical gas flow path, the filter (20) extends the filter path length without increasing overall dimensioning requirements of the filter, and produces centrifugal forces which improve particulate removal.

Abstract: A hollow, cylindrical, resin-bonded filter cartridge has an inner, depth-type filter media with a graded density which decreases (becomes porous) in the radial direction from the inner surface to the outer surface. An outer strip of filter media is then wound in a spiral or helix around the inner filter media. The outer filter media is also a depth type of filter media and has uniform density and is wound with adjacent windings abutting one another such that a continuous groove or channel is provided along the length of the cartridge. The groove or channel provides a greater effective surface area on the outer surface of the filter cartridge. The outer strip of filter media preferably comprises a lengthwise-extending body panel with a pair of leaves extending along either edge of the body panel. The leaves are folded against the lower surface of the outer filter media to provide a multi-layer outer filter media structure.

Abstract: Disclosed is a porous device adapted to remove particulates from a fluid passed through the device. The device includes a porous filtration medium. The medium has a first surface having an area which is adapted to receive the fluid for passage through the medium and a second surface from which the fluid exits the medium. The device is configured to variably increase the area of the first surface in response to a differential in fluid pressure between the first surface and the second surface so as to extend the life of the device. In some embodiments the device is adapted to retain the increase in surface area which acts as a visual indication that the device is reaching its capacity to retain particulates.

Abstract: A filter element of the present invention provides low pressure loss, superior filter performance and bonding of filtering material, and compactness. An inlet path of a nearly semicircular configuration which is formed in the width direction of a filter element is open at its upper side and closed at its lower side. An outlet path is closed at its upper side and open at its lower side. Corrugated filtering material has continuous mountain portions and valley portions. The mountain portions have a large radius of curvature R1, and the valley portions have a small radius of curvature R2. The valley portions are bonded to a flat filtering material. The open surface area of the inlet path is larger than the closed surface area of the outlet path 16. Preferably, R1/R2 is set so as to be within the range of 1.5 to 3.0.

Abstract: A filter seal for a substantially cylindrical air filter includes an integrally molded, polyurethane member which is configured with two primary portions. One portion is an annular body which is formed with an annular receiving channel, like a potting shell, which in turn is sized so as to receive one end of a corresponding filter element. The other portion is an annular sealing lip which is disposed in spaced relation to the receiving channel. This sealing lip includes a specific geometry providing both a ribbed, radial-sealing surface and a convex, axial-sealing surface. The radial-sealing surface provides sealing contact with a generally cylindrical outlet portion of the housing in which the filter element is placed in tension while axial sealing is achieved by compression of the axial-sealing surface against a generally planar surface of the housing.

Abstract: A spiral-wound filtration cartridge, which renders the need for brine seals unnecessary, is disclosed. The spiral cartridges of the invention comprise a spirally-wound inner filtration assembly having an impermeable outer cylindrical surface, a housing having a cylindrical cavity formed therein for receiving the inner filtration assembly, and at least one continuous longitudinally-oriented fluid pathway disposed between the inner filtration assembly and the housing, the fluid pathway allowing for a portion of a fluid entering one end of the filtration cartridge to bypass the inner filtration assembly and proceed to the other end of the filtration cartridge.

Abstract: A honeycomb body assembly, in particular a catalyst carrier body, includes at least one electrically heatable honeycomb body having layered metal sheets forming a stack with a plurality of channels through which a fluid can flow. The metal sheets have a thickness of about 0.03 to 0.12 mm. The honeycomb body is electrically subdivided with regard to its cross-section or in its axial direction. At least one electric current path is formed through the metal sheets with an electric resistance of between 0.01 and 2 .OMEGA.. The resistance, which is dependent on the temperature, can be used for monitoring and regulating the honeycomb assembly.

Abstract: A helically wound tube made of at least two sheets of preperforated flat roll paper material. Each sheet is helically wound in edge abutting relation such that one longitudinal edge of the sheet abuts the other longitudinal edge of the sheet to form a ridgeless seam. Some of the perforations of the subsequently wound sheets overlap some of the perforations of the previously wound sheets to form a reinforced cylindrical tube having perforations that permit radial flow through the cylindrical tube.

Abstract: An exhaust gas filter employed to remove harmful components from exhaust gases, more particularly from exhaust gases expelled by combustion engines, includes flow channels or chambers having gas-permeable walls. The walls are formed by a band having compression-moulded material and spacers with the band wound into a spiral. The spacers serve to form flow channels by maintaining a space between the individual windings of the band. The band and, if required, further parts of the proposed filter are then sintered together to form a unit.

Abstract: A filter apparatus that is compact and that provides a large filtration area includes filter elements each constructed in cylindrical form by spirally winding a filter medium. Such medium includes a porous membrane of a polytetrafluoroethylene having a pore diameter of 0.1 to 5 .mu.m and low pressure loss and one or a pair of sheets composed of fibers made of a thermally melting synthetic resin. One end of the cylindrical filter element is connected to a respective through hole in a rigid support plate, and the opposite end is blocked.

Abstract: In a roll of electrically conductive filter materials (21-28) coiled together with spacers (31) to be (38) disposed in alternate relation to the filter materials, the filter materials (21-28) have a plurality of pairs of adjoining edges joined together to define openings for admitting gases into the roll, so that the filter materials (21-28) may collect particulates from the gases flowing therethrough. A central electrode (41) is connected in the center of the roll, while a cylindrical outer electrode (42) is connected about the outer periphery of the roll, so that upon application of an electric voltage thereacross, the two electrodes may supply an electric current to the filter materials (21-28) to heat them for regeneration.

Abstract: A spiral-wound adsorber module is claimed for the removal of VOCs from fluid streams. The apparatus comprises a spirally adsorbent bed supported within a cylinder to provide a compact, longer adsorbent life alternative for a thermal swing adsorption process.

Abstract: A filter element comprising at least one coiled filter strip defining first and second butt ends, one of the butt ends being arranged to define an upstream surface during normal filtering operation, receiving fluid to be filtered, and the other of the butt ends being arranged to define a downstream surface during normal filtering operation, through which filtered fluid leaves the coiled strip.

Abstract: An efficient, economical, compact diesel particulate filter element in the form of a spiral roll. The filtering element is useful as a filtering element in a diesel particulate filter.

Abstract: A filter cartridge with a filter element inserted in a receiving space formed by a central cylindrical flow pipe 32 and a peripheral wall 34 is in terms of its possibilities of use and possibilities of adaptation to filtration problems substantially improved in that the filter element consists of fleece-like filter material and in that in its radial direction it comprises mutually enclosing zones of different filtering properties. For practical purposes, these zones can follow one another without any transition or they may be constructed with filtering properties which are varied in stepwise fashion. The filter element can be formed by the combination of a pleated filter fleece with a rolled-up filter fleece, the pleated part of the filter element being optionally on the inside or the outside.

Abstract: An electrically regenerable diesel particulate trap or filter comprising an electrically resistive expanded metal sheet or sleeve which when energized heats the filter element to a temperature sufficient to allow the trapped soot particulates to burn.

Abstract: A catalytic air cleaner purifies air in enclosed spaces, such as in an aircraft or spacecraft. The air cleaner includes a pair of metal strips, wound into a double spiral. The strips have projections, affixed to the strips, to maintain the spacing between turns of the spiral. The spiral defines a core which accommodates an electrically heated catalytic converter. The strips themselves have no catalyst coating. A pair of ports at the periphery of the spiral allows air to enter and leave the spiral through inlet and outlet channels. Air entering the spiral through the inlet channel receives heat, by heat exchange, from air leaving the spiral, and then enters the core, where the electrically heated catalytic converter burns off various impurities. The air then leaves the spiral through the outlet channel, and becomes cooled by transferring its heat to the incoming air.

Abstract: An efficient, economical, compact diesel particulate trap has a plurality of perforated hollow tubes, on each of which a heat-resistant yarn is helically cross-wound to provide a plurality of layers that function as a filtering element. The yarn, which preferably is a continuous-filament ceramic yarn, has a core from which filaments or fiber segments project outwardly and intermesh with fiber segments of laterally spaced cores to provide traps. The cores of yarn convolutions of at least one layer are laterally offset from the cores of convolutions of an adjacent layer to deflect into tortuous paths gases flowing generally radially through the filtering element.

Abstract: There is provided an improved reinforced corrugated thin stainless steel strip in which either or both of the longitudinal edges are overfolded to increase the thickness and stiffness of the foil to better resist the tendency to failure in a severe hot-shake screening test. There is also provided a core and an electrically heatable catalytic converter containing the core for use in the exhaust line of an internal combustion engine.

Abstract: A flexible tubular filtering material possessing a braided cord structure wherein a number of yarns are intercrossed with each other in the right and the left directions and braided into a cylindrical form, or said material additionally with the fiber assembly layer installed around the cylindrical periphery of the filtering material, which is free of bending obstruction and shows little textural change in the outer and inner peripheries of the curved portion against bend formation, and which possesses high particle removal efficiency and long service life; and a flexible filter element comprising this filtering material in a flexible casing.They are useful for liquid filters, specifically as a fuel filter for automobiles.

Abstract: An improved method for the continuous fabrication of filter units for use in automotive air bag inflators by spirally winding a hollow cylindrical core, at least one filter layer, and an outer layer to form a continuous spirally wound filter unit. The continuous spirally wound filter unit is then cut into individual filter unit of desired length by the use of conventional cutting device.

Abstract: The object of the present invention is to offer a general-purpose size filter cartridge for liquid filtration, which can extensively increase the service life for filtration. A depth type filter cartridge comprises a cylindrical hard porous core with threads wound thereupon, and it is characterized in that a sheet-like filter element is wound on said porous core directly or through a thread-winding layer, and a sheet-like filter element with a large number of pores is wound on said sheet-like filter element through a spacer.

Abstract: A comprehensive particulate filtering unit in which the filter includes bag like elements secured to infuser members which surround a blower and motor, designed to operate and be used as a compact portable unit.

Abstract: A filter element comprising at least one coiled filter strip defining first and second butt ends, one of the butt ends being arranged to define an upstream surface during normal filtering operation, receiving fluid to be filtered, and the other of the butt ends being arranged to define a downstream surface during normal filtering operation, through which filtered fluid leaves the coiled strip.

Abstract: An efficient, economical, compact diesel particulate filter comprising a casing with a plurality of concentric, spaced, perforated, supported, substantially rigid tubes substantially filling the casing radially, wherein the perforated surface of each tube is covered by a filtering element comprising substantially helically wound inorganic yarn, wherein each space between tubes is blocked at only one end of the tubes so that exhaust entering an unblocked space at one end of the casing passes radially inwardly and outwardly through filtering elements before exiting through an unblocked space at the other end of the casing.

Abstract: An exhaust gas cleaning device for a motor vehicle is constructed of a honeycomb core body formed by superposing a planar band made of a metal sheet and a corrugated band made from another metal sheet one over the other in a contiguous relationship and then rolling the thus-superposed bands into a multi-layered spiral form with at least one outermost layer thereof being formed of the planar band. The honeycomb core body defines a number of network-patterned axial gas flow passages and is adapted to carry an exhaust gas cleaning catalyst. At least one fin is fixed on an outer peripheral wall of the honeycomb core body.

Abstract: An exhaust gas cleaning device is constructed of a honeycomb core body. The honeycomb core body has been formed by superposing a planar band made of a metal sheet and a corrugated band made from another metal sheet one over the other in a contiguous relationship and then rolling the thus-superposed bands into a multi-layered spiral form. The honeycomb core body defines a number of network-patterned axial gas flow passages and is adapted to carry an exhaust gas cleaning catalyst. The honeycomb core body is divided into a central honeycomb core section of a smaller diameter and an outer honeycomb core section of a larger diameter. A separator is interposed between an outer peripheral wall of the central honeycomb core section and an inner peripheral wall of the outer honeycomb core section. The outer honeycomb core section may be divided further into plural honeycomb core sub-sections having different diameters and a additional separator may be interposed between each two adjacent core sub-sections.

Abstract: A filter cartridge with a filter element inserted in a receiving space formed by a central cylindrical flow pipe 32 and a peripheral wall 34 is in terms of its possibilities of use and possibilities of adaptation to filtration problems substantially improved in that the filter element consists of fleece-like filter material and in that in its radial direction it comprises mutually enclosing zones of different filtering properties. For practical purposes, these zones can follow one another without any transition or they may be constructed with filtering properties which are varied in stepwise fashion. The filter element can be formed by the combination of a pleated filter fleece with a rolled-up filter fleece, the pleated part of the filter element being optionally on the inside or the outside.

Abstract: An exhaust gas cleaning device is constructed of a honeycomb core body. The honeycomb core body is formed by superposing a planar band made of a metal sheet and a corrugated band made from another metal sheet, one over the other in a contiguous relationship, and then rolling the thus-superposed planar band and corrugated band together into a multilayered spiral form, defines a number of network-patterned axial gas flow passages, and is further processed to carry an exhaust gas cleaning catalyst thereon. The honeycomb core body defines, along the central axis of rolling thereof, an open cylindrical hollow space of a diameter .phi..sub.2 satisfying the following formula: ##EQU1## wherein .phi..sub.1 is the outer diameter of the honeycomb core body, and.phi..sub.2 is the outer diameter of the cylindrical hollow space.In other aspects of the invention, reinforcing cylinders or ribs are disposed to strengthen the overall structure.

Abstract: A soot filter has sets of three to five filter tubes disposed in a circle and axially parallel to one another, through which exhaust flows radially from the outside in during operation, composed of refractory ceramic yarn wound spool-wise to form hollow cylinders. To permit an electrical burn-off of the deposited soot with a relatively low expenditure of energy, the clearance A of all adjacent filter tubes 30 from one another amounts to 2 to 4% of the average filter tube diameter D. In each interstice 36 formed by at least three filter tubes 30 an elongated electrical heating element 37 is disposed which can be turned on if the exhaust gas stream is interrupted by shutting down the internal combustion engine or by diverting the exhaust gas stream away from a set of filter tubes.