Abstract: A system, in certain embodiments, includes a fluid filter that includes a first set of strips of a first filter material having a first density, and a second set of strips of a second filter material having a second density greater than the first density, wherein the first set and second set of strips are arranged in an alternating pattern to define a first filter layer. The system also includes a second filter layer comprising a third filter material having a third density greater than the second density, wherein the first filter layer is coupled to the second filter layer. In other embodiments, the system includes a fluid filter which includes a first filter material having a first density, a second filter material having a second density greater than the first density, and a third filter material having a third density greater than the second density.

Abstract: A water dissipation device for a breathing circuit is provided, including a bucket-shaped hollow composite structure having walls made of a first inner layer made of water vapor wicking material, and a second outer layer of a water vapor breathable medium surrounding the first inner layer. The device defines a flow space surrounded by the composite structure to provide a superior way of removal of moisture or water vapor from a breathing circuit, due to the greater surface area of flow spaces bounded by a water vapor breathable medium and the use of a water vapor wicking material and relatively long dwell times and flow paths through the device. The result is that when the device is connected to a breathing circuit, rainout or condensation in the breathing tube and collection of water within the breathing circuit is significantly reduced.

Abstract: An air cleaner 10 includes an air cleaner case 3 having an inlet 1 for introducing air and an outlet 2 for ejecting air. An intake pipe 5 having an intake opening 4 opened upward or obliquely upward in the air cleaner case 3 is connected to the outlet 2. The air cleaner 10 includes a main air filter element 6a positioned above the intake opening 4 and an auxiliary air filter element 6b, which is separate from the main air filter element 6a, positioned above the intake opening 4 but below the main air filter element 6a. The main air filter element 6a is configured to be detachable from the air cleaner case 3 with the auxiliary air filter element 6b fixed in the air cleaner case 3.

Abstract: A method and apparatus for practicing the method are provided for separating droplets of finely aerosolized elemental mercury from a gaseous stream in which the droplets are dispersed. In the method a gold plated metallic capillary surface is contacted with the gaseous stream, causing the aerosolized droplets to deposit on the capillary surface and by capillary action to coalesce with other of such droplets to form increasingly large drops of mercury. The surface is oriented to allow the mercury to flow by gravitational forces and capillary action to the lowermost portions of the surface, at which it accumulates, and is then collected at a suitable vessel.

Abstract: In a nano filter structure for breathing and a manufacturing method of the nano filter structure, a semiconductor process technology is used for manufacturing a nano filter structure comprising a top gate, a bottom gate, a plurality of sidewall gates and a plurality of supports. The sidewall gates include a plurality of filterable gratings, and the filterable gratings are controlled precisely to a nanoscale by a semiconductor process technology. Therefore, the nano filterable gratings can be manufactured easily and quickly, and the multilayer design of the filterable gratings enhances the aperture ratio of a filter material, such that users can inhale or exhale easily through the filter material.

Abstract: A composite fabric formed by depositing a web of nanofibers electroblown from a first polymer onto a first support web comprising fibers of larger average diameter than the nanofibers spun from a compatible material, in the absence of an adhesive between the webs, and solvent-bonding the webs together.

Abstract: An air filter with a clog-detecting device includes a housing having a wind outlet and a wind intake, a filter unit positioned between the wind outlet and the wind intake, an exhauster disposed between the wind outlet and the filter unit, a magnetic induction unit positioned on the exhauster, and a warning unit assembled on the housing and electrically connected with the magnetic induction unit. A metallic plate is axially fixed on the rotating spindle of a motor and positioned adjacent to the magnetic induction unit, having its upper side formed with at least one projection to enable the magnetic induction unit to induce the metallic plate and produce pulse signals. Thus, by detecting the frequency of the pulse signal, a user can know whether the air filter is clogged or not and proceed to remove the clogged condition to let the air filter continue to work normally.

Abstract: The invention is directed to a nonwoven layer for a filter, in particular, for a vacuum cleaner bag, wherein at least one region of the nonwoven layer, the region having a predetermined thickness and a predetermined area, has an average pore size smaller than 50 ?m and comprises fibers being bonded together such that a movement of the fibers relative to each other in a direction parallel to the surface of the layer is inhibited. The invention is further directed to a filter medium, in particular, for a vacuum cleaner bag, comprising a filter structure wherein a surface or an interface of the filter structure is provided with a filter paper layer having a smaller surface area than the filter structure.

Abstract: A filtration media that incorporates a static dissipative media layer for dissipating the static charge that builds up as a fluid, such a fuel, passes through the filtration media. The filtration media includes a filter media suitable for filtering fluid, and a static dissipative media layer. The static dissipative media layer has a surface resistivity level that is sufficient to classify the media layer as static dissipative rather than conductive.

Abstract: A filter bag for a vacuum cleaner includes at least three layers, at least two layers which include at least one nonwoven fabric layer and one nonwoven fibre layer being connected by a weld, a high bulk resulting due to the small number of welds per surface area.

Abstract: A substrate has corrugated sheet(s) and channel(s) for treating exhaust gases of combustion engines. The present invention also relates to methods for manufacturing and using the substrate having the open channel(s). The substrate (1) includes at least one corrugated sheet (3) having depressions (3d) and one flat wire mesh sheet (2) having depressions (2d) which is connected to the corrugated sheet (3) and between the flat wire mesh sheet (2) and the corrugated sheet (3) there are at least partially open channels (POC) for exhaust gas (EG) flow, and the depth of depression (2d) of the flat wire mesh sheet (2) is 0.05-2.0 mm smaller than the height of the corrugation (3c) of the corrugated sheet (3).

Abstract: A dust collection device for a sanding tool comprising a bag having a sidewall and a coupler attached to the bag. The sidewall comprising a first filter layer, a second filter layer, and an outer support layer. The first filter layer comprising a plurality of fibrillated electrostatically charged electret fibers forming a nonwoven web; the first filter layer having a total pressure drop between about 0.1 to about 4.0 mm H2O, and the first filter layer having a total basis weight between about 50 to about 450 gram/m2. The second filter layer comprising a melt blown microfiber nonwoven web; the second filter layer having a total pressure drop between about between about 5.5 to about 20.0 mm H2O, and the second filter layer having a total basis weight between about 15 to about 75 grams/m2.

Abstract: A composite filter element is provided. The composite filter element is configured for filtering fluid. The composite filter element includes a microglass media of glass fibers and a scrim laminated to the microglass media. The scrim is configured to provide support for the microglass media. In one aspect, the composite filter element has a filtration efficiency greater than or equal to about 99.5% for capturing a particle size of about 0.3 microns. In another aspect, a frame is provided that is configured to hold the at least one composite filter element in a V-shaped pocket and a basis weight of the microglass media and the scrim is at least about 90 g/m2. In another aspect, the scrim further can withstand approximately 25? of water gauge pressure without the glass fibers of the microglass media separating from each other.

Abstract: The invention relates to vacuum cleaner filter bag with a bag wall made of a filter material, wherein the bag wall and/or the interior of the vacuum cleaner filter bag comprise fibres containing a biopolymer and having an antibacterial effect and/or a powder produced from a biopolymer and having an antibacterial effect.

Abstract: An improvement to a reusable filtering assembly used in circulating air systems for residential or commercial heating and air conditioning systems. A series of layers consisting of filtering materials disposed between two framing units are comprised of the following: expanded metal lath, a layer of small fiber material, a layer of large fiber material, a layer of small crimp wire cloth, a layer of small fiber material, and a last layer of expanded metal lath. The present invention further comprises a stage loaded series of layers wherein the direction of air flow is from the first layer to the sixth layer comprising: Expanded Metal Lath, Small Fiber, Large Fiber, Small Crimp Wire Cloth, Small Fiber, and Expanded Metal Lath.

Abstract: An air filter assembly for an evaporative emissions control canister used with an internal combustion engine fuel system. The assembly includes: a housing having: an air inlet formed in an upper portion of the housing; and an air outlet; and; a baffle disposed within the housing. The baffle extends vertically downward from the air inlet in the upper portion of the housing towards a bottom portion of the housing. The baffles forming a plurality of vertically extending channels interconnected through a horizontally interconnecting channel formed between a bottom edge of the baffle and the bottom portion of the housing. A first one of the vertically extending channel receives air entering the housing from the air inlet.

Abstract: An air filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered air flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered air from flowing out of the second portion of the plurality of flutes so that air passing into one of the first face and the second face of the media pack and out the other of the first face and the second face of the media pack passes through media to provide filtration of the air. The fluted sheet includes repeating internal peaks facing toward the facing sheet and repeating external peaks facing away from the facing sheet.

Abstract: Thermoplastic bicomponent binder fiber can be combined with other media, fibers and other filtration components to form a thermally bonded filtration media. The filtration media can be used in filter units, such as breather caps. Such filter units can be placed in the stream of a mobile fluid and can remove a particulate and/or fluid mist load from the mobile stream. The unique combination of media fiber, bicomponent binder fiber and other filtration additives and components provide a filtration media having unique properties in filtration applications.

Abstract: A carrier for exhaust-gas purification is able to effectively protect against getting clogged with the particulate matters in a filter having carriers. The carrier is constituted with a web corrugated to have straight and/or zigzag ridges and then wound up into a column. The carrier for exhaust-gas purification is made of the web of wire netting or nonwoven metallic fabric, which is embossed to have ridges and grooves extending at least in a widthwise direction and further wound up spirally or stacked on top of the other into the column.

Abstract: In the description and drawings a final fiberglass product is disclosed. The final fiberglass product may have a fiber curl layer, a fiber skin layer, and a fiber loft layer between the fiber curl layer and the fiber skin layer. The fiber curl layer may be on an unfiltered air entry side of the final fiberglass product and have a plurality of generally sinusoidal fiber bundles therein.

Abstract: An apparatus and a method for filtering sectioning wastes of a microtome that are present in an air stream is suggested. The apparatus encompasses an aspiration device. With the aspiration device, sectioning waste can be aspirated from a blade region of the microtome with an air stream. The aspiration device comprises a main filter in which the sectioning wastes can be filtered from the air. In order to allow inadvertently aspirated histological sections to be retrieved again without mix-up, the apparatus according to the present invention has an aspiration device comprising a prefilter that is arranged between the blade region and the main filter and prefilters the sectioning wastes. The present invention further relates to a microtome.

Abstract: Filter media are described. The filter media may include multiple layers. In some embodiments, the filter media include a nanofiber layer adhered to another layer. In some embodiments, the layer to which the nanofiber layer is adhered is formed of multiple fiber types (e.g., fibers that give rise to structures having different air permeabilities and/or pressure drops). In some embodiments, the nanofiber layer is adhered to a single-phase or a multi-phase layer. In some embodiments, the nanofiber layer is manufactured from a meltblown process. The filter media may be designed to have advantageous properties including, in some cases, a high dust particle capture efficiency and/or a high dust holding capacity.

Abstract: The present invention relates to a filter composed of a multi-ply filter medium, which comprises at least one non-woven stiffening layer, at least one filtration layer, at least one covering layer and where necessary at least one non-woven microfibre layer, the non-woven stiffening layer comprising fibres of synthetic polymers and the fibres being both partially oriented and oriented fibres.

Abstract: Filters capable of dissipating static charges. One example includes a filter media pack comprising fluted media secured to facing media; the fluted media having cellulose fibers; and the fluted media including an amount of carbon black sufficient to impart a static charge dissipative property thereto. One example includes an air filter cartridge having a filter media pack comprising fluted media secured to facing media; the fluted media comprising cellulose fibers; the fluted media having at least one side coated with a static charge dissipative amount of a metallic coating. These filters are useable in, for example, dust collectors.

Abstract: A filter cartridge that includes a filter media. The media is pleated and the pleats are arranged into a tube about an axis with a first pleat proximate a last pleat. The filter cartridge includes a strap that has first and second end portions and that extends at least one revolution around the pleated media tube in a helix such that the first and second end portions of the strap are axially displaced from each other. The first and last pleats of the media are attached to each other and the first and second end portions of the strap are attached to the media. The filter cartridge may be made by an associated method. In one specific example, a stitching attaches the strap to the media.

Abstract: The invention provides a filter element which has a reduced initial pressure loss, can reduce an energy cost and can secure a high air flow rate, a filter element which has an elongated gas removing service life and filtering service life while keeping a high gas removing performance and a high dust removing efficiency, a manufacturing method and a method of use of the same. In a filter element (10) in which a pleated composite substrate (11) obtained by lapping or laminating an nonwoven fabric sheet including a fiber constituted by a thermoplastic resin and a gas removal sheet is pleated, and a pleated shape of the pleated composite substrate (11) is held by a shape retaining member (12a), a thickness of the nonwoven fabric sheet is increased at least 5% when heated to 60 degree C.

Abstract: In a plugged honeycomb structure 1A of the present invention, the PM-trapping layers 14 disposed on the surfaces of the partition walls 4 are extended up to inflow side end faces of the plugging portions 13 plugging outflow cells 3b so that adjacent PM-trapping layers 14 with the partition walls 4 and the plugging portion 13 therebetween are disposed so as to continue on the inflow side end faces of the plugging portions 13 and that the PM-trapping layers 14 extended up to the inflow side end faces of the plugging portions 13 form protruding portions 15 having a protrusion height corresponding with 0.1 to 2 times the length L of a side of the outflow cells 3b from the inflow side end faces of the plugging portions 13 toward the outside of the cell extension direction.

Abstract: A strainer provided in a refrigerant piping of an air conditioning device through which refrigerant flows includes a cylindrical shell disposed in the refrigerant piping, a cage type filter which includes an opening at one end and a bottom at the other end facing with each other relative to the flowing direction of the refrigerant and a meshed circumferential portion for allowing the refrigerant to pass through, but preventing sludge to pass through an annular passage provided between an outer circumferential portion of the filter and an inner circumferential portion of the cylindrical shell for the refrigerant to flow through and a leading pipe inserted into the refrigerant piping for letting the refrigerant and sludge and having an opening disposed in the cylindrical shell adjacent and opposing to the bottom of the filter and an inner circumferential wall along which sludge flows.

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 invention relates to a liquid separator, particularly an oil separator for compressed air systems. The liquid separator comprises a housing (15), which can be detachably connected by means of a bayonet-type connector (11) to a counterpart (12).

Abstract: A filter element having multiple formed layers of filtration media is disclosed. The media are layered so as to form a pore size gradient. The filter element is capable of removing both solid and liquid particulates from a moving fluid stream. The filter element has high strength and compressibility. The layers can be supported on a porous or perforate support to provide mechanical stability during filtering operations. The filtration media layers can be formed into various filter element forms such as panels, cartridges, inserts, and the like.

Abstract: An air separator and purifier device, structured to mainly include a main air extractor installed within a cylindrical housing, an air inlet and an air vent are provided in the upper and lower ends of the housing respectively to form a filter passageway, and filtering equipment is installed in the filter passageway. The air separator and purifier device is characterized in that: the housing includes an upper cylindrical body and a lower cylindrical body; a partition plate is located between the upper and lower cylindrical bodies; a round hole defined in the center of the partition plate connects with an air suction port of the main air extractor installed within the lower cylindrical body; and a preseparation structure and an air filter screen are installed within the upper cylindrical body and the lower cylindrical body respectively.

Abstract: A particulate collection system, including a particulate matter analyzer and collecting filter, provides a method of analyzing and collecting samples from fluids, such as collecting particulate matter from air. A mass measuring unit and composition analyzing unit can be provided for either simultaneous or immediately consecutive measurements within a single instrument. The filter material can have an antistatic electricity characteristic and can be impregnated with reference material to enable calibration of the composition analyzing unit.

Abstract: A filter medium comprising a carrier layer (1) and a microfiber layer (2) applied thereon is characterized in that, with respect to the aim of providing a filter medium which has a relatively low pressure drop, and at the same time a good fraction separation rate and excellent dust storage capacity, the carrier layer (1) has first fibers, which are designed as endless bicomponent fibers and spunbonded fibers, and the microfiber layer (2) has second fibers, which are designed as endless melt-blown fibers.

Abstract: A composite filter media includes an expanded substrate media carrying fine fibers, wherein the fine fibers are extended with the expanding substrate media, thereby improving dust holding capacity and slowing down pressure drop increase.

Abstract: Multilayer filtering composition for a protective breathing mask, characterized in that this filtering multilayer composition comprises, from the outside in: a) an external layer made of a spunbonded nonwoven fabric; b) a first intermediate layer of felt-type tribocharged nonwoven fabric based on at least two different types of fibres suitable for giving the fabric opposite electric charges that enhance the filtration; c) at least one second intermediate layer made of a nonwoven ply of melt-blown microfibres, said ply being charged with static electricity; and d) an internal layer in contact with the face made of a spunbonded nonwoven fabric.

Abstract: The pleated filter bag, which can be used in a bag-house type dust collector, is elongated and has a longitudinal hollow center with an open end, and a pleated filter wall circumscribing the hollow center. The pleated filter wall has a felt such as PTFE fibers felted onto an apertured and pleatable scrim which can be made of metal, and having a permeability lower than a permeability of the scrim. A membrane of lower-permeability material, such as an E-PTFE membrane, covers the support felt on the outer side of the bag.

Abstract: A filter media including a scrim, a polytetrafluoroethylene (PTFE) media substrate upon the scrim, and a layer of expanded polytetrafluoroethylene (ePTFE) membrane adhered to the PTFE media substrate on the scrim. The filter media is pleatable and has air permeability of approximately 3-10 cubic feet/min at a 0.5 inch H2O pressure drop and an original filtration efficiency greater than 99.0% when tested in an unused, unpleated condition with a 0.3 micron challenge aerosol at a flow rate of 10.5 feet/min and when tested after a cleanable dust performance test according to ASTM D6830.

Abstract: The present invention relates to a filter composed of a multi-ply filter medium, which comprises at least one non-woven stiffening layer, at least one filtration layer, at least one covering layer and where necessary at least one non-woven microfiber layer, the non-woven stiffening layer comprising fibers of synthetic polymers and the fibers being both partially oriented and oriented fibers.

Abstract: Disclosed is a water-proof and dust-proof membrane assembly and applications thereof. The water-proof and dust-proof membrane assembly comprises a body and a supporting member. The body is of membrane and has a first surface, a second surface, and an asymmetric porous structure formed between the first surface and the second surface of the body. The asymmetric porous structure has a thickness ranging between 1 ?m and 1000 ?m, a first volumetric porosity ranging between 5% and 99%. The asymmetric porous structure has plural pores, and each pore has a pore diameter between 0.01 ?m and 15 ?m. The supporting member is of a polymeric material and has a first contacting surface, a second contacting surface, and a second volumetric porosity which is greater than the first volumetric porosity. The first contacting surface of the supporting member is adhered to the first surface of the body.

Abstract: A breathable composite barrier fabric for protective garments includes a high strength nonwoven web, a barrier layer and an aperture film layer, with the barrier layer between the high strength nonwoven web and the film layer. The different layers and webs may be bonded together to form the fabric using calendaring, thermal bonding and/or adhesives. The breathable composite barrier fabric is capable of blocking particles as small as 0.3 microns at greater than 99% efficiency while allowing air transmissions between 7 CFM and 9 CFM at 20 Pa. Protective garments may be constructed using the breathable composite barrier fabrics so that the high strength nonwoven web is on the body side of the garment and the film layer is on the exterior of the garment.

Abstract: A composite filter media for a vacuum cleaner comprising a first filtration layer comprising a slit film having a plurality of continuous electrostatically-charged polyolefin filaments disposed substantially parallel to each other along their lengths; and a second filtration layer comprising a high-efficiency filtration media selected from wet-laid filter paper, dry-laid filter paper, and nonwoven filter media; wherein said first filtration layer is disposed in series with said second filtration layer, with respect to an air flow direction through said vacuum cleaner, to form a composite.

Abstract: A filter for particle cleaning of impurities in gas flows must be compact and also as effective as possible, including having a pressure drop as low as possible. According to the invention, such filters are composed of three ring-shaped and pleated filter elements, comprising an outermost (4), a middle (5) and an innermost filter element (6) said filters being held together at the inlet side (1, 12) and outlet side (9, 10) of the filter, respectively. Hereby, gas may be supplied to the exterior of the filter as well as to the spaces (8) between the innermost filter element (6) and the middle filter element (5), and this gas will be discharged (14) both from the central filter chamber (15) and from the chamber (17) between the middle filter element (5) and the outermost filter element (4).

Abstract: Various high performance, high efficiency filter media are provided that are cost effective and easy to manufacture. In particular, various filter media are provided having at least one layer with a waved configuration that results in an increased surface area, thereby enhancing various properties of the filter media. The filter media can be used to form a variety of filter elements for use in various applications.

Abstract: An air intake filter assembly for filtering air flowing from a front end to a rear end includes a housing, a first filter stage, and a second filter stage. The filter stages are insertable in and removable from the housing. A latch is movable between a latched position in which the first filter stage is secured to the housing, and an unlatched position in which the first filter stage is not secured to the housing. A hinge is formable between the housing and the first filter stage, and the hinge allows the first filter stage to pivot with respect to the housing when the latch is in the unlatched position. When the first filter stage and the second filter stage are inserted in the housing and the latch is in the latched position, then the first filter stage is compressed against the second filter stage, which is compressed against the housing.

Abstract: A method for cleaning a filter having Z-media includes providing a filter having Z-media and cleaning the media construction by directing a pulse of compressed gas into the media construction through the downstream flow face. Filter elements useable with such methods include elements made of Z-media. An example system utilizing the method includes a gas turbine air intake system.

Abstract: A dryer operable in close proximity to and in series with an inkjet printhead comprises a heat source and an air bearing structure on one side of the predetermined path and having a pressurized air inlet and an air outlet adjacent to the drying position of the receiver medium. Air flow from the air bearing structure outlet forms an air bearing for the receiver medium. A microporous filter positioned at the outlet and being adapted to convert the air flow from the outlet to a diffuse flow, the microporous filter being formed of an inner layer of very fine screen for optimum air diffusion and an outer layer of courser woven screen to add rigidity and protection from scuffing.

Abstract: A web can comprise a substantially continuous fiber mass and a separation means dispersed into the fiber. The web having a preferred thickness resulting from forming a polymer material and a particulate into a fine fiber layer can have a variety of end uses. A filtration media can include a structure comprising such a web of fine fiber and a substantial volume of particulate embodiment of the separation means. The resulting fine fiber structure provides an improved filtration medium having substantial depth, thickness, and a layered structure. The improved properties of the web results from inclusion of the separation or spacer particulate.

Abstract: The present invention is a filter that includes a length of filter media and a continuous, substantially nonlinear adhesive strand. The filter media has a front face and a rear face. The filter media has a plurality of pleats defined by a plurality of fold lines, each fold line being intermediate oppositely sloping first and second wall surfaces. The plurality of fold lines comprise a first plurality of pleat tips and a second plurality of pleat valleys. The adhesive strand is provided on the front face of the filter media in discontinuous contact with the filter media. The adhesive strand contacts the filter media at a pleat tip and contacts the filter media at a portion of a first wall surface and contacts the filter media at a portion of a second wall surface.

Abstract: A smoke evacuating system for use during surgical procedures, particularly minimally invasive procedures involving the use of a laser or cautery at a surgical site having an associated higher than ambient pressure, wherein the system includes a filter with a site side and an outlet side and a fluid conduit extending between the surgical site and the filter. The filter includes a filter media and a housing substantially surrounding the filter media with a space between the filter media and the housing to collect condensed vapor. The filter exhibits low resistance or a low pressure drop and resists fluid flow, whereby the higher than ambient pressure is not substantially diminished and generates a fluid flow in the fluid flow path tending to carry smoke to and through the filter.