Abstract: A filter cartridge having a flexurally rigid frame with a filter element inserted therein is formed of a frame composed of a blank in a single piece, and is folded inward forming a double-walled box profile.

Abstract: An accordion filter insert has a frame formed about the filter material. The frame has an elastically deformable sealing lip on the periphery of the frame. The elastically deformable sealing lip is formed of the same material as the frame itself. The sealing lip and frame are formed as a unitary piece.

Abstract: An air duct has a filter mount opening originally intended to accept a shallow filter element for filtering air entering the duct. The opening has an interior flange whose original purpose was to support the shallow filter element. This flange has interior edges defining an air passage opening. The invention is implemented a filter unit including a frame and a deep filter element mounted in the frame. The frame has dimensions allowing the filter unit to replace the conventional shallow filter element with the frame inserted into the air passage opening and closely spaced to all of the interior edges. A resilient gasket is mounted adjacent to the opening's interior flange and projects slightly into the air passage opening so as to contact the deep filter element's frame. The gasket prevents air leakage between the interior flange's interior edges and the frame.

Abstract: A disposable air filter comprising a sheet of filter media, at least portions of the major surfaces of which are disposed to define parallel planes along those opposite major surfaces of the sheet intended to be placed normal to the direction of movement of air through the filter; and a frame.

Abstract: A filter cartridge has a filter medium, which, on the circumferential side, is surrounded with clearance by a gasket-seal. A frame is arranged in the gap formed by the clearance, and is sealingly bonded to the edges of the filter medium and the gasket-seal.

Abstract: An air filter device and an automobile having the same includes an air filter bent without disassembling a cowl to be simply and easily replaced within a narrow space, and the air filter is commonly utilized to both left-handed drive type and right-handed drive type automobiles. For this, an air filter member is formed with a creasing part throughout the overall portion thereof. A pair of frame members support the marginal edge of the air filter member, and a connecting frame member is integrally connected to the ends of the first frame member and second frame member to allow for bidirectional bending of the air filter member. Thus, the air filter is simply replaced without causing an interference with a frame mounted with a shock absorber. Also, the second frame member is upwardly bent at any time even though the up and down portions are reversed to have compatibility capable of being commonly employed into the left-handed drive type automobile and right-handed drive type automobile.

Abstract: A filter element, in particular for purifying the intake air of an internal combustion engine, constituted by a non-woven fabric or paper folded in the manner of a concertina and secured as a flat plate in a frame (10). In order to increase the stability of this filter medium (11), strut segments (19, 20) are disposed on the frame, which engage in folds in the plate and are bonded thereto.

Abstract: An air filter has a generally rectangular frame having surfaces defining generally a plane, and a pair of parallel side rails and a pair of parallel end rails along outer edges of the plane-defining surfaces, the rails flaring outboardly at an obtuse angle from the plane when the frame is unconfined, one of the rails at each corner of the rectangular frame being provided with tabs, and the other, contiguous of the rails at the corner having an open end into which the tab extends. The tabs have an angled outer surface and are of a length compared with the height of the open end to be held against movement clear of the open end in every position of the rails when the frame is assembled, to limit the outward flare of the rails and to ensure that the corners of the rails are substantially closed in every position of the rails.

Abstract: A re-usable frame support rack is provided for supporting and retaining an outstretched, replaceable pleated-media filter core. The pleated-media filter core is of a type that has fold lines extending in a transverse direction and that stretches-out/collapses in the longitudinal direction. The support rack has a frame formed of spaced longitudinal rails extending between spaced transverse rails. The frame carries a pressure-differential support system that provides support, in instances when a pressure differential exists across the frame, to the filter core on a low pressure side thereof. The transverse rails preferably include fingers or like gripping formations for releasably gripping the longitudinal margins of the installed filter core. The longitudinal rails include gates or flaps which have closed and open positions for allowing retention and unobstructed removal in the closed and open positions, respectively, of the longitudinal margins of the installed filter core.

Abstract: A replaceable air filter apparatus suitable for filtering the air in the home includes a frame for affixing the apparatus to the house duct work associated with the heating and/or air conditioning system the frame includes a hinge disposed on one edge, which cooperates with a hinge disposed on a register that may control the flow of air through the duct work and may include adjustable shutters and a device for removably retaining a filter media. The register may be pulled away from the frame for inserting and removing the filter media disposed therein, when desired.

Abstract: A filter cartridge has a frame made of tough material, which sealingly surrounds an accordion fold pack on its circumferential side. The frame is made of assemblable, plate-shaped frame elements and has, on the circumferential side along the lower and/or upper edge of the frame, a tongue, the tongue being insertable in a latticed holder having a U-shaped profile. A viscous joining compound is used to affix the tongue in place. The tongue is formed by strip-shaped tongue elements, each tongue element being joined to a frame element, wherein the adjacent ends of the tongue elements are sealingly fastened to each other by connecting corner pieces.

Abstract: A reusable filter for use in a spray paint booth is advanced which includes a frame supporting a series of equally spaced horizontal vanes. Each vane is formed to have a shape which reduces clogging of the front face of the filter and forces the air stream to make successive directional changes to thereby effectively remove particulates from the air stream. Three sides of the frame are equipped with a bendable lip that provides a fluid tight seal between the wall and the frame. The fourth side of the frame is formed with access holes enabling paint particulates and liquid cleanser to be quickly removed from between the vanes. The filter is made of a polymeric material which is impervious to solids and can be cleaned by any cleaner normally used to remove paint from a surface.

Abstract: An air filter kit for residential and light commercial air filtration applications including a user assembled, dimensionally adjustable, air filter frame assembly capable of telescopic adjustment of both length and width. Telescopic adjustment is facilitated by a plurality of slidably engaged frame members which together form an adjustable peripheral filter frame defining a recessed channel for receiving a quantity of filter media therein. Adjustment of the frame members is further facilitated by the use of a lubricating substance such as a friction reducing synthetic tape between the members. A quantity of spongy filter media is secured cut to size and secured within the recessed channel by a quantity of hook material projecting into the filter media. A perimeter gasket anchors the frame dimensions while providing a positive seal between the frame and a filter track.

Abstract: A filter apparatus for use in a forced air ventilation system, the filter apparatus having a first fan folded sheet of a washable first type of filter material, a second fan folded sheet of a second type of filter material, and fanfolds of the first and second fan folded sheets are substantially equally shaped and folded together such that the fanfolds of the first and second fan folded sheets are interdigitated to form a filter material assembly. The first type of filter material is preferably an electrostatically self-charging washable material such as woven polypropylene and the second type of filter material is preferably disposable and contains activated charcoal. The filter material assembly may be removably disposed in a rectangular filter frame for mounting the filter material assembly in the forced air system. The filter frame has at least one crank shaft rotatably deposed between two opposed side walls which are between an open front end and an open back end of the frame.

Abstract: A filter assembly for use in an air purifier unit having a rectangular shaped air inlet entrance to the unit blower. A rectangular shaped frame containing a HEPA filter pack is slidably received within the blower inlet. An L-shaped flange surrounds the filter frame and closes against the air inlet of the blower to provide an air seal. The top wall of the flange is offset some distance from an adjacent wall of the frame to provide a handle for the filter assembly.

Abstract: An expandable filter cartridge for installation in the filter housing of a vehicle includes a rectangular frame having top and bottom legs and side legs. The side legs of the frame are extendible and retractable in length to configure the frame between a relatively compact size for insertion into the filter housing and a relatively expansive size for spanning the interior dimensions of the filter housing. The filter cartridge is installed by being inserted while in its compact configuration into a slot in the filter housing and, once inside, expanded to span the interior dimensions of the housing.

Abstract: A frame supports a deep filter element to allow the filter element to be installed in a duct's conventional air intake opening as a replacement for a conventional shallow filter element. The frame has a flange to mate with a surface of the intake opening's interior flange. In one embodiment, two identical side panels are assembled with the relatively stiff end panels of a particular filter element to form the frame.

Abstract: A cabinet panel (10) has a filter element (12) for removing particles from cooling air used in an electronics enclosure. The filter element is removably mounted to the cabinet panel adjacent an air intake opening (14). Plugs (18) extend outwardly from the cabinet panel at predetermined locations proximate the air intake opening to releasably and matingly engage bores (30) disposed about a frame (22) of the filter element to form an air sealing relationship with the cabinet panel so that air passing through the air intake opening passes through the filter element. A cover (32) having an aperture (34) is removably mounted to the panel so that air passing through the filter element passes through the aperture. In one embodiment, the cover is removably, pivotally mounted to the panel. In another embodiment, the cover has locking arms (60) that removably engage locking slots (44) which are matingly disposed through the cabinet panel.

Abstract: The invention concerns a gas filter unit or cartridge type, including a filter material put together to form one or several filter bags, and a support frame of essentially U-shaped cross-sectional configuration, including a web portion and two lateral leg members in adjoining relationship, the filter material closest to the mouths of the filter bags being clamped in position between said lateral leg members. In accordance with the invention, the frame includes profile sections of a flexible material, preferably a plastics material, at least one of said lateral leg members being hingedly interconnected with the web portion, in addition to which locking means are provided to retain the corresponding lateral leg member in its clamping position in which it is pivoted into engagement with the other lateral leg member.

Abstract: An electrostatic supercharger screen (10) is within an air flow duct (12) in front of a standard air filter (14), between a furnace/cooling unit (16) and an air vent grill (18) in a wall (20) of a building (22). The screen (10) includes an element (24) for removing small microns of particles in air that goes past the standard air filter (14) within the air flow duct (12), so as to help clean the air of pollens, smoke, odors and bacteria. A structure (26) is for supporting the removing element (24) parallel to the standard air filter (14). A component (28) is for confining the removing element (24) and the supporting structure (26) in a juxtaposed relationship.

Abstract: A filter, especially for the interior ventilation of vehicles, including at least one filter body configured as a plate-like element and a frame surrounding the plate-like element, the frame being made from at least two frame parts joined together in the plane of the plate-like element.

Abstract: The invention relates to a dual-function filter type pot cover, comprising an outside plate, an inside plate, a diverting cover, a filter element and a switching knob, wherein the outside plate, the inside plate and the diverting cover are combined as one, while the switching knob can rotate in relation to the diverting cover, on the inside plate are air vents, on the diverting cover is a separating plate that divide it into a first space with a filter element and a cover plate and a second space with steam holes and an arched guide groove, while on the inner rim of the switching knob is a protruded obstructing plate that is located in the guide groove, so that by rotating the switching knob, when the obstructing plate is away from the steam holes, the steam in the pot will escape without obstruction from the air vent on the inside cover to the first space and out of the steam holes, suitable for cooking food with water, or on the other hand, in case the cooking involves frying with oil, the obstructing plate

Abstract: A grill filter assembly for mounting in the exit or entrance wall opening of a forced air duct wherein the grill plate may be installed in a hinged relation to the duct enabling easy access to the duct opening. In a preferred embodiment, the grill face plate is adapted to have a particulate filter and/or, if desired, a scent dispenser disposed thereon and the hinged relation of the face plate enables easy access to the filter for the changing thereof. Since the grill filter assembly is adapted to be mounted directly into the exit or entrance opening of the duct, the faceplate contains no unsightly screws or other fixtures as are common on heating and air conditioning registers and face plates. In a preferred embodiment, the assembly includes match means for cooperating with the wall to expeditiously mount the assembly in the duct.

Abstract: A filter element including a filtration part and a mounting frame retaining the filtration part therein. The frame is formed by a profile with a center part and two border parts. The filtration part is retained between the border parts. The border parts are positioned in generally parallel relation to each other. A strip of material is firmly fixed to the border parts such that one end of the strip is fixed to one of the border parts and an opposite end is affixed to the other of the two border parts. The strip is in generally parallel relation to the center part.

Abstract: An air filter for providing a reusable frame and disposable filter media. The air filter includes a frame defining a channel into which a filter medium is removably received and replaceable with another filter medium. This frame also provides a nonconductive static electricity isolator for static charge retainment. A sealing member is secured to the outer surface of the frame to provide a seal between the frame and the HVAC filter mounting assembly into which the frame is inserted. The sealing member is configured to insure an air tight seal such that the air is forced through the filter medium before the air is circulated into a room.

Abstract: A filter assembly having first and second opposite frame members and a filter element removably secured to the first and second frame members is provided. The filter element is preferably a pleated paper filter, positioned in extension between opposite end panels. An arrangement is provided for securing the end panels to, and in extension between, the first and second opposite frame members. When the arrangement is assembled, an outer frame comprising the two frame members in the two end panels is provided. In the assembly, the pleated filter fills the area within the frame. The filter media can be conveniently removed and replaced in the frame, as desired.

Abstract: This invention relates to improving the efficiency of air filter systems that incorporate adjustable air filter frames having telescoping frame sections. In such systems, an air bypass space exists between the frame and the filter frame support member in the air duct. This invention provides an air bypass clip that is inserted between the filter element contained in the adjustable air filter frame and the frame support member. The air bypass clip has a sealing lip which bears against the support member thus blocking the flow of bypass air between the adjustable frame and the support member.

Abstract: A filter kit for electronic equipment such as personal computers and stereo amplifiers. The kit includes frame material having a total length of at least two feet, a generally "U" shaped cross section and a width of less than 11/2 inches, at least one square foot of air filter material and material for attaching a frame made from the frame material around the air intake of the electronic equipment. In a preferred embodiment, the filter kit contains rubbery vinyl gasket material, filter material and double-sided tape. A filter frame large enough so that it fits around the air intake to the electronic device is made from the gasket material. The frame is then attached to the electronic device with doublesided tape or it may be glued in place. Finally, the filter material is inserted inside the frame. The rubbery nature of the frame permits filter replacement (even stiff filters) without removal of the frame from the electronic device.

Abstract: A novel soot filtering cap in a range hood includes a hood body, a soot absorbing perforated filter and a magnetic strip frame. A hook and loop fastener is provided on the peripheral rim of the vent cap of the hood body. The filter is made of fabric material having strong oil absorbability and strong gas penetrability and is fastened on the peripheral rim of the vent cap of the hood body. A plurality of vent holes are provided on the filter for smooth venting during operation of the range hood, while soot are completely absorbed by the filter. Furthermore, the plane area of the filter is larger than the cross section area of the vent cap and a protective edge is provided on the periphery of the filter.

Abstract: A filter system for an HVAC system includes a rectangular frame with a central opening. A conventional filter spans the central opening for interaction with the incoming forced air. A grid spans the filter on the incoming air side thereof, the grid presenting a plurality of horizontal and vertical spaced-apart strands having aromatic particles impregnated therein. Upon contact of the incoming forced air with the grid, the aromatic particles are transferred to the incoming air so as to scent the conditioned air. The period of material transfer of the scent particles to the incoming forced air preferably corresponds with the useful filter life, such that a cessation of delivery of the scented air is indicative to the user that the filter proper needs to be changed.

Abstract: A nestable filter having a central panel with a frame attached around the peripheral edges of the central panel. The central panel has elongated corrugations which extend longitudinally from one side to the opposite side. The frame is made up of frame members which have a generally V-shaped cross-section, the inner leg of which attaches to the edges of the corrugated central panel. Corrugated voids are formed on the inner wall of at least two of the frame members, aligned with the channels formed by the corrugations, permitting the filter to nest within a similarly constructed filter.

Abstract: A transformable and collapsible filter frame which can support various air intake filtering media for internal combustion engines. One form of the filter frame corresponds generally to the shape of a carousel. The frame facilitates replacement of reusable filtering medium to be applied over its surface. The filtering media may be a polyurethane foam. The carousel filter frame structure includes expandable and adjustable parts, rings and struts which, when integrated are used as supporting members. The rings and struts include connecting members and can be easily disassembled and reassembled. The carousel filter body structure can be easily transformed into various configurations and sizes with the adaptable filter frame parts as desired to form other different types of filter shapes or forms. One shape of the carousel can be split to form various shapes of filter frames such as a circle, cylinder, shield, cone, oval, square, rectangle and various combinations thereof.

Abstract: A filter having a nestable frame including a first leg, a second leg extending obtusely from the first leg, and a third leg extending from the second leg and forming a channel between the second and third legs. A brace having similar first, second and third legs is mounted to the frame, with the second and third legs of the brace preferably extending into the channel of the frame. A chamber is formed by the second and third legs of the frame and the second and third legs of the brace. The chamber is preferably filled with material which rigidities the box beam structure formed by the walls surrounding the chamber. A filter medium material attaches to the frame, by adhesion and/or by clamping engagement between the first legs of the frame and brace.

Abstract: In a filter element, such as an air filter element used for filtering engine air or cabin air in vehicles, a pleated filter media is disposed within a plastic frame and retained therein by the same material which is used to form a gasket for sealing with a housing in which the filter element is mounted. The gasket is formed of polyurethane foam or any other flexible sealing material such as plastisol or silicone and is cast molded around the outer periphery of the frame over a plurality of interlocking tabs. The seal is therefore mechanically locked to the frame as well as being adhered to the frame.

Abstract: An air register with a filter element for filtering particulars from the air flowing from the ductwork into a room. The filter element is replaceable as necessary and is sandwiched within a recess in the register face plate by a pivotable retaining plate. The retaining plate lockingly engages the face plate to retain the filter across the openings of the register. The retaining member facilitates replacement of the filter without having to remove or disassemble the body of the register.

Abstract: A moisture resistant air filter has a generally planar air permeable filter media with an upstream and downstream surface and a peripheral edge. A frame surrounds the filter media peripheral edge providing an inner peripheral frame surface to which the filter media peripheral edge is attached. The upstream and downstream panels are integrally formed with the frame, the upstream and downstream panels having large openings therethrough. The frame and the panels are formed of paper board of about 0.016 to 0.060 caliper and coated with polyethylene or polypropylene.

Abstract: A filter unit is provided for a forced air heating duct having an inside and an outlet end with a register. The unit includes a frame having a tapered body shaped to wedge within the duct adjacent the register. A filter is shaped to fit inside the duct and is disposed entirely between the duct and the register. The filter can be replaced by removing the register, while leaving the frame in place.

Abstract: An adjustable filter assembly for a variety of filtration applications. The adjustable filter assembly includes a fixed-size filter medium and frame and an adjustable molding for adjustably applying said filter assembly in applications having widely varying dimensions. The filter assembly can take a variety of shapes and sizes so that any vent may be adequately fitted and filtered. The adjustability of the assembly is accomplished by the molding having at least one adjustable joint enabling the molding to be continuously adjusted from an unextended position through to a fully extended position. In the unextended position, the outside edge of the molding coincides with the perimeter of the filter media and the inner edge of the molding defines a minimum exposed area for the filter medium. In the fully extended position, the inner edge of the molding coincides with the perimeter of the filter media and the outside edge of the molding extends outwardly significantly beyond the perimeter of the filter media.

Abstract: A method and apparatus for a filter assembly having a filter element with a plurality of openings encapsulated in a filter element carrier in a first molding operation, which may include formation of first and second channels on first and second side portions of the filter element carrier. One or more first holes are also formed through the filter element carrier in the first operation, wherein the first holes interconnect the first side portion of the filter element carrier and the second side portion of the filter element carrier so as to expose filter element portions encapsulated therebetween. A first sealing element is formed on the first side portion of the filter element and a second sealing element is formed on the second side portion of the filter element with a molten sealing element material in a second molding operation.

Abstract: A filter assembly having first and second opposite frame members and a filter element removably secured to the first and second frame members is provided. The filter element is preferably a pleated paper filter, positioned in extension between opposite end panels. An arrangement is provided for securing the end panels to, and in extension between, the first and second opposite frame members. When the arrangement is assembled, an outer frame comprising the two frame members in the two end panels is provided. In the assembly, the pleated filter fills the area within the frame. The filter media can be conveniently removed and replaced in the frame, as desired.

Abstract: A filter (32) is provided for a medical sterilization container (10) having a port (18,22,24) allowing fluid communication between the interior of container (10) and the surrounding environment. A peripheral frame (44) is adapted to cooperate with the port (18,22,24). A plurality of cross-members (54) span an aperture (48) formed by a frame (44). A filter medium (58) is disposed across the aperture (48) so as to be interposed between the interior of the container and the cross-members (54).

Abstract: A disposable paperboard container for holding a bed of solid filtration media is disclosed. The container is strong enough to prevent excessive pillowing, has sufficient open area to minimize the pressure drop across the bed, avoids bypass gaps caused by settling of media, is made of environmentally safe disposable materials which do not react with the media or absorb excess moisture, and is inexpensive enough to be discarded rather than refilled. In accordance with other aspects of the invention, space within a media container created by settling is automatically occupied by expandable plugs to prevent bypass. Container units embodying the invention may be combined to form filtration modules which are strong, yet light enough to be handled easily.

Abstract: A lightweight, self-supporting filter housing is disclosed. The housing is economically and simply manufactured by being die cut from flat sheet material to create (a) a plurality of panels serially interconnected at respective scored fold lines and (b) a pair of oppositely disposed holding-frame portions, each of which is interconnected at a scored fold line that is shared with one end of a respective one of the panels. When the sheet material is folded along the scored fold lines, it forms a structure with a tunnel-like passageway open at both ends, and the oppositely disposed holding-frame portions are positioned within the passageway to support the filter media element diagonally along the length of the tunnel-like passageway. The filter media is held in place and sealed within the housing by being pressed between the holding frames when the two outermost panels of the one-piece housing are fastened in superimposed alignment with each other.

Abstract: A filter insert for the filtering of the fresh air supplied to a motor vehicle interior has an accordion-folded filter element which is self-supporting. Lateral strips coated with an adhesive are provided on the faces which extend on the left and on the right. On the faces which extend in parallel to the folding, angle strips are arranged whose first leg extends along at least three fold edges. The filter element is surrounded along the faces by a foamed-material sealing.

Abstract: A frame for a panel-like filter having two sides terminating in an edge comprises a semi-resilient deformable channel having an inwardly curved web with two flanges extending from a convex side thereof. The curved web also has a longitudinally extending stiffening rib projecting from the convex side thereof. The flanges are engageable with the sides of the filter.

Abstract: The invention relates to a cylindrical filter element, which has a longitudinal slot in order to be able to expand the filter element elastically for the purpose of fitting in a circumferential groove. To prevent any fluid from being able to pass unfiltered through the longitudinal slot, the invention proposes to configure end faces, which delimit the longitudinal slot, such that they run in the secant direction or in the peripheral direction. This has the advantage that the end faces overlap and therefore the longitudinal slot is closed when the filter element is installed.

Abstract: A filter element has a carrier plate with a mounting groove which extends around a filter chamber recess. A filter cloth blank, which covers this recess, has a mounting frame which is formed on and sits in the mounting groove. The filter cloth is thus positioned easily, quickly and in a crease-free manner on the carrier plate and a liquid barrier is thus obtained at the edge of the filter cloth blank.

Abstract: An air intake system having a housing and an air filter. The housing has an air inlet, an air outlet, and an air conduiting path therebetween. The path includes changes in air flow direction and velocity at least four times each along the path.

Abstract: An air filter, particularly for ventilating the interior of motor vehicles, is provided. The air filter includes a housing having an unfiltered-air inlet and a clean-air outlet, as well as a filter medium folded in an accordion-like shape. The filter medium is arranged in a filter insert which has a surrounding seal. An adapter is integrated in the housing and also includes a surrounding sealing device to provide an effective seal between the unfiltered-air and clean-air sides of the housing. The filter insert is arranged in the adapter and is fixed in position via a cover flap of the housing.

Abstract: There is provided a pleated zig-zag filter in a filter frame assembly. The filter frame has triangular shaped pleats stabilizing elements on two sidewalls with the pleat stabilizing elements forming a pleat retaining gap that frictionally engage with the filter pleat tips on one face of the filter holding the filter in the frame assembly. The pleat stabilizing elements engage the filter pleat tips on the second face.