Abstract: A filter for use in safety air bags as employed in vehicles and the like comprises compressed corrugated wire wherein the corrugations are formed as a periodic sequence of substantially identical first sinusoidal waves coplanar in one orientation of a first given amplitude and pitch and a periodic sequence of substantially identical second sinusoidal waves of a second amplitude and pitch different than the first given amplitude and pitch oriented orthogonal to the plane of the first waves to form a wire with complex three dimensional waves. The wires so formed are wrapped about a mandrel in multiple layers and the ring so formed distorted into an oval shape that is inserted into a filter forming die. A plunger then is forced under high pressure into the die to form the compressed wire filter. The layers of undulations of the wire interlock to preclude separation of the compressed layers during deployment of an air bag.

Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.

Abstract: A cylindrical filter for a gas generator includes, a plurality of layers made of a porous metal plate in which a compressive strength (S1) of a predetermined region in at least one end in the height direction is set smaller than a compressive strength (S2) of a portion other than the S1 region, the porous metal plate being selected from the group consisting of expanded metal, metal lath, and perforated metal, and the S1 region corresponding to a region of 5 to 20% in length from both ends with respect to the overall height.

Abstract: A device for condensing water includes a container with a plurality of openings and a heat transfer zone arranged in an interior of the container. The heat transfer zone includes a bulk material layer and/or a fiber layer and/or a textile layer and/or a grid layer and/or a lattice layer and/or a perforated plate. The interior of the container is subdivided by the heat transfer zone into a first zone and a second zone. Further, the heat transfer zone has at least in sections an open porosity and/or channels through which process gas can flow from the first zone to the second zone and through which a further process gas in the form of cooling gas can flow in a reverse direction. A permeable region of the heat transfer zone partially includes materials which have a thermal conductivity of more than 20 W(mK)?1 in a temperature range up to 300° C.

Abstract: A wire mesh mist collector pad having multiple density zones, the zones being arranged other than to provide a constantly increasing density gradient, provides a reduced pressure drop and increased capacity. For example, the pad can include at least three zones with the zones arranged so that the density gradient in the direction of gas flow through the pad varies from low to high to low or from high to low to high.

Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.

Abstract: A wire mesh mist collector pad having multiple density zones, the zones being arranged other than to provide a constantly increasing density gradient, provides a reduced pressure drop and increased capacity. For example, the pad can include at least three zones with the zones arranged so that the density gradient in the direction of gas flow through the pad varies from low to high to low or from high to low to high.

Abstract: The present invention provides a cylindrical filter for a gas generator, including: a plurality of layers made of a porous metal plate in which a compressive strength (S1) of a predetermined region in at least one end in the height direction is set smaller than a compressive strength (S2) of a portion other than the S1 region, the porous metal plate being selected from the group consisting of expanded metal, metal lath, and perforated metal, and the S1 region corresponding to a region of 5 to 20% in length from both ends with respect to the overall height.

Abstract: An improved particulate filtration system has an inlet, for the fluid to be filtered, connected to a housing containing a filter medium such that the fluid passes through the filter medium, and an outlet for the filtered fluid to exit. The filtration system's improvement is the filter medium being comprised of a porous ceramic of fused platelet grains. In a particular embodiment, the porous ceramic is a celsian porous ceramic, where the celsian grains have a hexagonal morphology and display a continuous volume thermal expansion coefficient from 100° C. to 1000° C.

Abstract: A method and a device produce a fleece of metallic fibers in a layer in which the metallic fibers are welded to one another to form the fleece. A welding process is repeatedly carried out with regard to a portion or section of the fleece. Such metallic fiber fleeces are used, in particular, for exhaust gas treatment units in the automobile industry.

Abstract: A compressed wire mesh filter for an airbag assembly has one or more wires wrapped around the outer perimeter of the filter prior to final compression of the mesh to increase the hoop strength of the filter.

Abstract: A compressed wire mesh filter for an airbag assembly has one or more wires wrapped around the outer perimeter of the filter prior to final compression of the mesh to increase the hoop strength of the filter.

Abstract: A plate-shaped filter element made from several wire cloth layers and having at least one layer in the form of a filter cloth is designed to allow particles of a certain size can be filtered out from a filterable material, whereby, in particular, particles can be filtered out from a fluid, an emulsion or the like. The filter element according to the invention is configured such that at least the layer forming the filter cloth is provided with spaced-apart alternating crossovers at an angle to the warp and weft threads. The alternating crossovers extend in a zigzag whereby each straight section extends across a same number of warp threads. The alternating crossovers extend from the edges which are parallel to and spaced from the warp wires. The filter element according to the invention is particularly suitable for filtering of emulsions.

Abstract: To provide a heat resistant filter of which the reduction of tensile strength and folding endurance is small even when used as a filter material for a filter used at high temperatures, failure of the filter material is difficult even when used at high temperatures, and which is capable of achieving a long life. The heat resistant filter contains: a heat resistant organic fiber base material, and a resin composition which contains an alkaline substance and which adheres to the heat resistant organic fiber base material.

Abstract: An exhaust gas filter for cleaning an exhaust gas of an internal combustion engine includes at least one strip-shaped filter layer made of a material through which a fluid can at least partly flow. The filter layer has a length in a longitudinal direction and a width in a transverse direction. The filter layer has a metallic reinforcing region at least in a partial region. The metallic reinforcing region has a width and a length. The width of the reinforcing region is less than the width of the filter layer and/or the length of the reinforcing region is less than the length of the filter layer. A method for producing a filter layer for an exhaust gas filter is also provided.

Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.

Abstract: The present invention provides a coolant for an air bag inflator in which unevenness in density in the axial direction is reduced even though the coolant is compressed in its axial direction. The coolant is a molded product made of wire rods and compressed in its axial direction. An absolute value of a difference between a radial pressure loss of the axially upper half portion of the coolant and a radial pressure loss of the axially lower half portion of the coolant is 10 mm H2O or less at a flow rate of 250 liters/minute under the atmosphere of 20° C.

Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.

Abstract: An airbag inflator includes non-azide gas generating propellants, surrounding an ignition device, disposed inside a housing. The gas generating propellants are surrounded by a coolant/filter device having a pressure loss of 0.3×10−2 to 1.5×10−2 kg/cm2 at a flow rate of 100 l/min/cm2. A space is provided between an outer periphery of the coolant/filter device and the housing such that the combustion gas passes through the entire area of the coolant/filter device. The coolant/filter device is also surrounded by a swell suppressing layer which prevents the coolant/filter device from swelling due to a combustion of the gas generating propellants.

Abstract: In a mist recovering apparatus for recovering a mist contained in a gas, provided with a filter having pores of pore size increasing from a gas inlet side toward a gas outlet side, the gas containing the mist is passed from the gas inlet side of the filter, through the filter toward the gas outlet side of the filter. The mist is trapped by the filter and grows into droplets as the gas containing the mist flows through the filter, and the droplets drip down along the gas outlet surface of the filter and are collected under the filter.

Abstract: A catalyst for purifying an exhaust gas includes a substrate, a catalyst carrier layer, a catalyst ingredient and a hydrocarbons supplier. The catalyst carrier layer is formed on the substrate. The catalyst ingredient is loaded on the catalyst carrier layer. The hydrocarbons supplier is disposed in the substrate, and supplies supplementary hydrocarbons into the catalyst carrier layer so as to securely react the supplementary hydrocarbons with NO.sub.x included in an exhaust gas. Hence, the catalyst can purify not only CO but also NO.sub.x over a wide temperature range.

Abstract: The filter for an inflator of the present invention includes a cylindrical compressed mesh unit, which is multi-folded in its substantially entire length, and the multi-folded mesh unit is provided by folding a cylindrical wire mesh knitted from a single metal wire by a predetermined length from its one or both end portions in the longitudinal direction, so as to be overlaid on the outer peripheral surface of the cylindrical wire mesh, and such a folded overlaying is repeated a plurality of times. Then, the cylindrical mesh unit thus constituted is compressed in its longitudinal direction. The above-mentioned compressed cylindrical mesh unit should have a cavity ratio of 70 to 80% in terms of cavity ratio C defined by the equation indicated below:C=(.rho.o-.rho.)/.rho.o.times.100(%).

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: An apparatus and method for sterilizing air for medical uses applied to air compressors used in dentists' apparatuses. According to the invention, we use the heat of the air coming out from the air outlet provided on the head of the compressor, to reduce the bacterial charge of a filtering cartridge fitted on the conduits that feed the air to the devices. A body contains a sterilizing cartridge and a pipe coil or a conduit through which the air coming out of the head of the compressor passes, so that it is possible to use this heat for heating the cartridge thus reducing the bacterial charge of the same every time the compressor is turned on, without the need of disassembling parts or components.

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: 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: An air flow containing microorganisms including fungal spores is sterilized by heating the air flow to a sufficient temperature to weaken cellular walls of the microorganisms, inducing turbulence in the air flow; and providing in the air flow sufficient contact surface against which the microorganisms may hit and be destroyed at a flow rate and turbulence level of the air flow.

Abstract: Disclosed is an apparatus for removing caprolactam emissions from a broad variety of sources, especially from caprolactam polymerization operations and thermoplastic polycaprolactam processing operations which contains a header for collecting air containing the emissions, a duct, and a candle filter housing, which is connected to the header by the duct, a candle filter located in the candle filter housing, which is connected to the duct, a nozzle for rinsing the candle filter with an aqueous caprolactam solution, which is connected to the candle filter; a reservoir having a drain which is connected to the candle filter, a circulation pump for recirculating the aqueous caprolactam solution from the reservoir to the candle filter, a refractometer and a feedback equipment for maintaining the caprolactam concentration in the reservoir at a predetermined level and a fan for moving the air through the header, duct, candle filter and candle filter housing.

Abstract: Method and product made for preventing loose tinkles in a wire mesh product. Opposite ends of a sock of knitted wire mesh are subjected to a single-ply bonding operation such as electric resistance welding, thereby bonding the tinkles to the mesh. The sock is then compressed to produce a foraminous product suitable for use as a slag filter in automotive airbag assemblies.

Abstract: A filter filters the gas generated by an air bag inflator. The gas comprises an alkali metal oxide. The inflator comprises a non-woven metal fibrous mat and small particles of a silicon compound, reactive with the alkali metal oxide, adhered to strands of the mat.

Abstract: A combined spray dryer and gas filter vessel in which a solution containing sulphuric acid and solids, and a hot drying gas, are introduced vertically through the top of the vessel into a spray zone. Solids are removed at a single point at the bottom of the vessel. Filters located above the spray zone clean gas leaving the vessel, and the cleaned gas exits at the top of the vessel. The compact design reduces insulation requirements while avoiding condensation which would create corrosion and yet it provides good separation of solids from gases.

Abstract: A filter arrangement for an airbag gas generator of the type utilizing gas-producing propellant charge to generate gas to inflate an airbag, and having a filter chamber exhibiting contoured interior surfaces. A gas permeable filter material with a large effective filter surface is disposed in the filter chamber in such a manner as to substantially completely fill up the filter chamber and to contact substantially all of its contoured interior surfaces. The filter material comprises a circular knitted wire knit, rolled up and pressed into a shape corresponding to the shape of the filter chamber.

Abstract: An oil filtration and exhaust apparatus for filtering particulates and gases from the recirculating oil of a vacuum pump which is adapted to remove gases from a process enclosure. The oil filtration and exhaust apparatus removes particulates and gases from the recirculating oil by means of particulate filters and a gas scrubbing filter. Additionally, the exhaust gases are demisted prior to exhaust to an exhaust header. The apparatus is particularly suited to semiconductor manufacturing processes.

Abstract: An elongated screen assembly, which in various forms, is useful as a scallop in a reactor, or as an underdrain for a gravity filter system, has a cross-section in a direction normal to its axis which is at least twice as wide as it is high. A method is also disclosed for manufacturing the screen assembly by pressing the opposed sides of a wrapped wire cylindrical screen assembly between a pair of plates which have radii of curvature which are different from each other and greater than the radius of curvature of the cylindrical screen assembly.

Abstract: The present invention relates, by way of a novel industrial product, to a filter for gaseous fluid, which contains a lyophilized and compressed filter element in the form of a porous layer.

Abstract: A method for filtering liquid or gaseous materials where the filtration is conducted with a porous filter media prepared from an aqueous wet-laid, lofted fiber-reinforced composite sheet, the composite sheet comprising a heat fusible polymer, reinforcing fibers and a binder. The random fiber composite sheet can be selectively lofted or recompressed to form filter media having variable porosity. Also, a membrane support means prepared by applying or treating the fiber-reinforced composite sheet with a discriminating membrane layer.

Abstract: A filter element and method for making it include the steps of providing a pleated paper filtering media and providing a batt-like filtering media containing thermoplastic fibers which is slightly larger than the pleated paper filtering media. A ring-shaped die is used in a press to apply heat and pressure to the edges of the batt-like filtering media while accommodating the rest of the batt-like filtering media in the aperture of the die. Accordingly, a stiffened wall is provided which circumscribes the pleated paper filtering media. The pleated paper filtering media is attached to the stiffened, fluid-impermeable wall to provide a fluid-impermeable seal therebetween. A perimetrically-extending flange gasket is simultaneously formed around the edge of the batt-like media, so that the latter can be sealingly engaged in an air cleaner housing.

Abstract: The invention relates to the recovery of precious metal lost from precious metal-containing catalysts for example the precious metal-containing catalysts which are used in the production of nitric acid by ammonia oxidation. In more detail, a getter (as herein defined) for recovery of precious metal lost from a precious metal-containing catalyst operating at elevated temperature comprises an agglomeration or assemblage of unwoven fibres made from a metal selected from the group ruthenium, palladium, iridium, platinum, gold, silver, rhodium and alloys containing one or more of the said metals. Preferably, the unwoven fibres are randomly oriented.

Abstract: The present invention provides an apparatus and process for separating and removing chemical impurities from air which impurities are difficult to absorb. The apparatus for carrying out the process of the present invention comprises a reaction tower (11, 51, 91) into which the air-gas mixture is fed, aperture means (35, 74, 96) in a wall (16, 60, 98) of the tower, at least one filter means (12, 52, 92) carried in the reaction tower, means for distributing (13, 58, 93) an absorbent medium onto the filter, collecting means (14, 54, 94) beneath the filter for collection of the absorbent medium passing through the filter, and fan means (15, 55, 95) provided in the aperture for creating a flow of air through the reaction tower for the separation of substantially all of the impurities therefrom.

Abstract: A diesel exhaust particulate filter contains a high temperature depth type filter material arranged in a reflexive path throughout which diesel particulates are collected from engine exhaust gases passed therethrough. Upstream and downstream portions of the filter flow path are disposed in heat exchange relation. Upon heating of the incoming gases to the incineration temperature of collected particulates, the heat of combustion in the downstream portion will be partially transferred to the upstream portion, providing more even temperature levels and improving balance of the incineration process.

Abstract: A filter assembly is provided for fluid supplies for vehicle occupant restraint systems which employ a combustible gas generator to inflate a confinement upon the occurrence of a collision. The filter assembly includes two sets of layers of porous filter material.One set includes a plurality of layers of fibrous filter material of relatively high porosity such as steel wool. The other set includes a plurality of layers of filter material arranged in order of descending porosity between the gas generator and the confinement and positioned intermediate the layers of the former set. Each of the layers of this other set is of substantially lower porosity than those adjacent layers of the former set.

Abstract: This invention is concerned with a removable filter to prevent the buildup of Creosote in chimneys which become vulnerable to fires.A hollow enclosure means that is adapted to connect between the chimney and the fire source has within it a support for mounting a filter. The filter is made of a special metal, is knitted with small openings therein permitting the flow of smoke but at the same time to reduce the particles into a minute white ash. The filter acts as a continuous burn reactor. A door is provided whereby the filter can be easily removed from the hollow enclosure and cleaned so that it can be used for an indefinite period without replacement.

Abstract: A flame arresting filter element for air intake systems has an outer ring of pleated filtering paper and an inner, concentric ring formed of expanded metal foil, longitudinally stretched and laterally compressed so as to be adapted to diffuse and quench frames resulting from engine backfire. The inner ring is coated with a relatively inert, cohesive substance to provide a unitary structure. The two rings are provided with resilient end caps.

Abstract: A filter bed for an air cleaner, or the like, comprising a compressed mass of coils each having axially spaced portions of different diameters. With this construction, the tendency of the coils to nest together over their entire lengths is reduced, and the filtering ability of the bed is increased.

Abstract: In a mist filter for use in eliminating moisture from the humidity laden air traversing through the evaporator of an automobile or other air conditioner, the filter comprises a pair of corrugated screens, with the corrugation of each screen being arranged perpendicularly with the corrugations of the other adjacent screen, a pair of said screens being fastened together, and arranged contiguously with the evaporator of the air conditioner.

Abstract: An automobile type exhaust gas lead filter is particularly applicable to diesel engine smoke reduction. It has a tubular housing with alumina coated metal wire fibers as the filter bed, which is centrally located. There are open spaces forming plenums at the ends of the housing. And, the inlet and outlet pipes have baffles in alignment therewith to prevent direct impingement of exhaust gases on the coated wire. Also, the baffles are spaced from the inside ends of the pipes to minimize pressure drops.

Abstract: Method and apparatus for demisting gases wherein a stream of gas containing submicron liquid particles is caused to pass through a filter material comprising at least in part a material having a porosity of at least 0.985.

Abstract: An inlet air cleaner assembly is provided for the air intake of gas turbine engines comprising, in combination, an array of vortex air cleaners removing coarse and heavy contaminant particles, but not light and well dispersed contaminant particles, and an array of sheets of filamentary woven or nonwoven material, arranged to receive partially cleaned air from the vortex air cleaner array, and remove light and well dispersed contaminant particles suspended therein.

Abstract: A fortified metal filter possessing a high filtering efficiency, a large pore ratio and a wide net area of fused parts of fine stainless steel wires is prepared by crushing the edges of these wires. The wires utilized in the system are composed of numerous polygonally cross-sectioned fine stainless steel wires. The procedure for preparing such filters, in which only the fused part, which arises from the crushing of the wire edges, possesses a large net area and the metal is diffused into the fused part, is achieved by heating and compressing the system simultaneously.

Abstract: A running textile web that has been subjected to soaking by a liquid such as a scouring solvent is carried between a suction box located adjacent one face of the web and a source of pressurized and relatively dry heated gas adjacent the other face thereof and opposite the suction box. The heated gas passes through the web and is drawn into the suction box, enhancing the amount of liquid removed at this stage and presenting the web into a drying stage with less entrained liquid than if the web were subject to the action of the suction box only. The amount of mechanical mist is kept to minimum within a closed scouring range by means of a closed loop between the suction box and a return conduit provided with a trap containing a batt of metallic wool. The liquid discharge from nozzles employed to uncurl the edges of the web is directed against shields also containing a batt of metallic wool to reduce bouncing, noise and mist generation.