Abstract: A filter guide ring is disclosed which comprises a ring having a top surface, a bottom surface; an inner ring side, and an outer ring side, a first leg having a first short leg portion extending outwardly from the outer ring side, a first elbow connected to the first short leg portion, and a first long leg portion extending upwardly from the first elbow, a second leg having a second short leg portion extending outwardly from the outer ring side, a second elbow connected to the second short leg portion, and a second long leg portion extending upwardly from the second elbow, and a third leg having a third short leg portion extending outwardly from the outer ring side, a third elbow connected to the third short leg portion, and a third long leg portion extending upwardly from the third elbow.

Abstract: Systems and methods for monitoring quality of filters within a filtering system are disclosed. The system includes at least one pressure sensor which monitors a force applied by a filter on a filter housing. The system further includes a control system which provides notification to a user when the force measured by the at least one pressure sensor exceeds a predetermined threshold value.

Abstract: A filter element is provided with a folded bellows that has a first pleated section with parallel arranged first pleats and a second pleated section with parallel arranged second pleats. The first pleats of the first pleated section are positioned at an angle relative to the second pleats of the second pleated section. The end face edges of the first pleats of the first pleated section adjoin a first clean chamber. The end face edges of the second pleats of the second pleated section adjoin a second clean chamber. The second clean chamber is delimited by a longitudinal side of an edge-side pleat of the first pleated section. The first and second clean chambers are connected to each other. A filter insert with such a filter element is provided.

Abstract: A filter is configured to be used in a variety of different devices to filter particulate matter from a fluid (e.g., air or water), such as residential or commercial air filtration systems, automobile filtration systems, and water filtration systems. In one embodiment, the filter includes a filter medium and a support member. At least one inwardly deflected portion of the support member engages at least one portion of the filter medium to couple the support member to the filter medium. In one embodiment, the deflected portion of the support member may be deflected inward at an angle between approximately 90 degrees and approximately 180 degrees. The filter medium may be any suitable filtration material, such as fiberglass, paper, or vegetable fibers (e.g., cotton). The support member may be constructed of expanded metal, wire mesh, or a flat plate.

Abstract: Described herein is a substrate including a central longitudinal axis, a first support web, and a second support web. A sinuous web may be positioned between the first support web and the second support web. The sinuous web may include transverse web portions and bridging web portions, where the bridging web portions alternatively connect ends of adjacent transverse web portions. The sinuous web may be connected to the first support web by support legs extending between bridging web portions and a surface of the first support web. The sinuous web may be connected to the second support web by support legs extending between bridging web portions and a surface of the second support web. A support leg length to distance between transverse web portions ratio may be from about 1.0 to about 4.0.

Abstract: An air cleaner arrangement or assembly is provided. The air cleaner arrangement includes a serviceable filter cartridge. The air cleaner assembly also includes an arrangement for positioning the filter cartridge into a preferred, sealing, orientation and for securing the filter cartridge in that location. Preferred serviceable filter cartridges are provided, as well as methods of assembly and use.

Abstract: A filter insert piece has a filter element with first and second pleated sections each having parallel pleats. The first and second pleated sections each have an inflow side. A first flat outflow side of the first pleated section and a second flat outflow side of the second pleated section adjoin a common clean chamber of the filter element. A length of the pleats of the first and second pleated sections is such that a spacing of an outwardly positioned pleat end face of the pleats at the first or second inflow side, respectively, relative to the center axis increases or decreases monotonic from pleat to pleat. The respective end pleats of the first and of the second pleated sections have a different length extension measured from the outwardly positioned pleat end face of the first end pleats or the second end pleats relative to the center axis.

Abstract: A method of producing a polymer nanofiber structural body of the present invention includes: forming, on a base material, a first layer in which polymer nanofibers are irregularly integrated by an electrospinning method; cutting the first layer together with the base material; and irradiating an argon beam from a base material side in parallel with a fracture surface to direct the length directions of the polymer nanofibers of the first layer on the base material side toward the thickness direction of the first layer to form a second layer different from the first layer in pore structure, thereby providing a polymer nanofiber structural body having a plurality of pore structures and free of any clear interface.

Abstract: An air filter element for an air filter may include a first end plate and a second end plate spaced apart from each other in an axial direction and configured to bound the filter element in the axial direction. The first filter body may be arranged axially between the first and second end plates. A second filter body may be arranged axially between the first and second end plates. An intermediate plate may be arranged axially between the first and second filter bodies and have an intermediate plate area enclosed by an intermediate outer contour and a first end plate area enclosed by a first outer contour.

Abstract: An air filter device is provided with a filter housing and a filter element arranged in the filter housing. A frame part is connected to the filter element and frames the filter element at least over sections thereof circumferentially. The frame part is provided with an air duct receptacle that is adapted to receive an air duct. The frame part is arranged at least partially on an exterior side of the filter housing. The filter element is fastened by the frame part on the filter housing.

Abstract: A filter element (10) comprises filter bellows (16), in particular open filter bellows made of a filter medium (18), which has an oncoming flow side (28) and an outgoing flow side (30) for the fluid to be filtered. The filter element (10) is disposed in the filter housing (11) in such a way that it separates at least one inlet (15) from at least one outlet (17). An element axis (14) of the filter element (10) and a housing axis (25) of the filter housing (11) may be aligned in parallel with or axially to the installation direction (12) in the filter housing (11) for installing the filter element (10). The filter element (10) has at least one outer support section (38), which protrudes axially beyond the filter bellows (16) on the oncoming flow side (28) or the outgoing flow side (30) with respect to the element axis (14) and protrudes into an axial projection of the oncoming flow side (28) or the outgoing flow side (30) with respect to the element axis (14).

Abstract: A filter housing (11) has at least one inlet (15) and at least one outlet (17) for the fluid. The filter element (10) includes an open filter bellows (16) of a filter medium (18).The filter element (10) is arranged in a filter housing (11) separating the at least one inlet (15) from the at least one outlet (17). An element axis (14) of the filter element (10) and a housing axis (25) of the filter housing (11) can be aligned parallel or axially to an installation direction (12) of the filter element for installing the filter element (10) into the filter housing. The filter element (10) includes at least one guide crosspiece (46, 48) which extends axially and radially outward on a peripheral exterior side (26), relative to the element axis (14), of the filter element (10).

Abstract: A device for filtering contaminated air includes an air filter, an intake fan driven by an electric motor, a filter housing, to which the air filter can be fastened by means of a threaded connection, and a battery for driving the electric motor, wherein the intake fan has a guide blade and an impeller, and the intake fan is arranged in a chimney-shaped shell on the filter housing.

Abstract: An air filter arrangement is disclosed. The air filter arrangement includes strips of media comprising fluted sheets secured to facing sheets and forming inlet and outlet flutes secured to one another in a stack. Media pack arrangements including such stacked media with peripheral, perimeter, housing seal arrangements are described. Also described are air cleaners including the filter cartridges. Methods of assembly and use are also provided. Also, systems of use are described.

Abstract: Based on an electrospinning method, a layer A formed of a polymer continuous phase is formed by: setting a potential difference between an ejection portion configured to eject a polymer solution and a collecting portion configured to collect the polymer nanofibers to a voltage value at which the polymer nanofibers can be spun; and setting the potential of the collecting portion to a low value with respect to a ground potential. Next, a layer B formed of polymer nanofibers and a polymer continuous phase is formed by increasing the potential of the collecting portion without stopping the application of voltages to the ejection portion and the collecting portion. Further, a layer C formed of polymer nanofibers is formed by increasing the potential of the collecting portion without stopping the application of the voltages to the ejection portion and the collecting portion.

Abstract: Disclosed are an air filter element, a filter housing, and an air filter in which the air filter elements have a high filtering capacity and a long service life by increasing the filter surface of an air filter element taking into account structural requirements for the air filter housing.

Abstract: The present invention is directed, in part, to air filtration media, air filtration media packs, air filtration elements, and methods of making air filtration media, media packs, and filtration elements. The air filtration media typically has a fiber composition that is primarily cellulose fibers, the media having a low solidity and low basis weight and being suitable for forming of structured flutes into the media. In certain embodiments a resin is added such as a solvent based resin.

Abstract: A filter element has a multi-layered filter medium web with several layers that is folded along folding lines. The filter medium web has at least one functional region in at least one section located between adjacent folding lines. The at least one functional region is a first embossment. The layers of the filter medium web are firmly bonded to each other along the first embossment. A device for folding a multi-layered filter medium web has an energy-introducing embossing unit that embosses the filter medium web fed by a feed unit to the embossing unit. A folding unit for folding the filter medium web along folding lines is provided. The energy-introducing embossing unit embosses and firmly bonds the layers of the filter medium web along at least one functional region in at least one section of the filter medium web located between adjacent folding lines.

Abstract: Filter assemblies and filtering systems including the same are disclosed. In some embodiments the filter assemblies and systems include a diffusion member and first and second pleated parts, wherein the first and second pleated parts include different first and second peak heights h1 and h2, respectively. In some instances h1 is greater than h2, and h2 and the thickness of the diffusion member are set such that an upper surface of the diffusion member does not extend past said first upper peaks when the diffusion member is seated in a seating place defined by a seating place that is at least partly defined by the second pleated part. The filter assemblies and systems may also be configured such that an air flow filtered by said second pleated part passes through said diffusion member.

Abstract: Disclosed is a system for filtering airborne particles from an occupied space. The system permits the removal of airborne particles by manipulating both the charge and the size of the particles, thus enabling the capture of particles that most other typical filtration systems leave behind. More specifically, the system captures small airborne particles through the use of a series of electric fields, forcing them to be trapped in a series of filters or collide to form larger particles, whereby their movement and capture are subsequently governed primarily by airflow. The system controls particle behavior by utilizing specific electromagnetic fields to collide particles, capture particles, and deactivate live pathogens that get captured.