Abstract: A spaced pocket filter assembly has a pocket secured to a holding frame and a spacing member within the pocket made of a single sheet of material. The spacing member has an alternately folded Z or zig zag configuration and is secured to the interior of the pocket along each of the fold lines. The pocket assembly can be manufactured by interposing a roll of a sheet media for the spacing member between rolls of filter media for the pocket. The spacing member media is folded into the Z or zig zag configuration, layered between the pocket media, and secured to the pocket media continuously along the fold lines.

Abstract: A filter element for separating fine dirty particles from a hot gas. The filter element comprises a first porous wall and a second porous wall. Each porous wall has an outer surface and an inner surface. The first and second porous walls being coupled together thereby forming a substantially closed figure and open at one end. The open end is formed to be coupled to a hot gas clean up system support structure. The first and second porous walls define a channel beginning at the open end and terminate at the closed end through which a filtered clean gas can flow through and out into the clean gas side of a hot gas clean up system.

Abstract: A filter bag assembly and method and machinery to form the same wherein spaced opposed filter bag panels are connected together by transversely extending preselectively sized binder strips fastened selectively at opposed ends to the spaced filter panels to restrain outward inflation of the filter bag.

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: A dust collector includes a hollow housing having a bottom solids outlet, a top clean air outlet and an intermediate dust laden air inlet. A plurality of vertically elongated filter assemblies are mounted in spaced relation within the housing. Each filter assembly includes an open framework covered by a sheet of filter material in the form of a glove that converges downwardly from the open upper end to a closed end engaged by a tensioning nose bar which serves to stretch the glove over the framework. Dust laden air enters the inlet, passes downward to the bottom ends of the filter assemblies, thence upward to the filter assemblies where the dust and other particulates are collected on the outer side of the filter sheets and the air passes through the filter sheet and upward into the top clean air outlet. The particulates collected on the filter sheet periodically are released therefrom and gravitate downward into the bottom solids outlet for removal.

Abstract: A self-supporting pocket fluid filter wherein layers of pocket forming filter medium are laminated with open-faced filter netting of sufficient rigidity to provide for self-supporting of completed filter pocket members without additional support mechanisms between or inside extended pockets.

Abstract: A filter device inserts into a duct having flow passing from upstream to downstream. The filter device includes fluted filter media having flutes formed therein inserting into a housing. The filter media is stacked and placed at an angle to the prevailing flow direction.

Abstract: A pocket filter includes a front frame which accommodates at least two filter bags. The top of each bag accommodates a reinforcing frame. The bags are secured dust-tight to one another, to the reinforcing frames, and to the front frame. The front frame is a severed at at least one point along its perimeter. The front frame has a U-shaped channel around it that opens inward, and the reinforcing frames can be inserted into the channel when the front frame is open at the severed point. The reinforcing frames match each other and match the size of the front frame, creating a dust-tight contact between all the adjacent reinforcing frames and the inner surface of the channel when the front frame is closed at the severed point. Facing webs, disposed in the channel opening on each side of the "U", create a dust-tight contact with the reinforcing frame.

Abstract: A particulate filter for a fluid stream being of preselected thickness with progressively increasing fibrous density from the upstream face toward the downstream face, the filter having a transversely and uniformly extending planar sheet-like adhesive barrier at a preselected location and quantity between the upstream and downstream faces thereof.

Abstract: An air filtration media comprises a single layer of randomly oriented and randomly intermingled synthetic, polymeric resin microfibers, staple fibers and bonding fibers. The microfibers, taken as a whole, have an average fiber diameter no greater than 5 microns and comprise between 50% and 90% by weight of the filtration media; the staple fibers, taken as a whole, have an average fiber diameter between 10 and 30 microns and typically, comprise between 5% and 45% by weight of the filtration media; and the bonding fibers, taken as a whole, have an average fiber diameter between 0.9 and 15 denier and comprise between 5% and 25% by weight of the filtration media. The bonding fibers have thermoplastic surfaces with a lower temperature softening point than the microfibers and the staple fibers and bond the fibers together to form the air filtration media.

Abstract: A filter insert, which combines high mechanical load-bearing capacity with good characteristics as regards the shedding of filter cake, has lateral filter walls which are folded in planar or zigzag manner and which are connected to horizontal wall components in mechanically loadable and air-tight manner. The unit so obtained is in turn connected in tight and mechanically loadable manner to a top section by which the filter insert is capable of being attached to the perforated plate of a filter casing.

Abstract: A bag (1) for filtering dust-laden gas in a bag filter that extends between a perforated plate (22) having holes (23) and support and positioning structure adjacent to a far end (17) of a filter box, is in the form of a tubular bag made from a U-shaped tube (1) having a flexible filtering wall that is permeable to the gas but that retains the dust transported thereby, the gas penetrating into the bag (1) and flowing in filtered form to an end opening (1f) of the wall that opens out in a hole (23) of the plate (22). The U-shaped tube of the bag (1) is mounted in the enclosure in such a manner as to present two tubular filtering lengths (1a, 1b) that are substantially parallel, with the base (1c) thereof being pinched to form a substantially gastight joint and being disposed towards the far end (17) of the enclosure. The invention is applicable to bag filters for cleaning dusty premises, and to filtering discharges made to the outside.

Abstract: A filter element for the separation of dust particles from a gas flow or air flow. The filter element includes a number of filter pockets and a main support frame, the open mouth edges of the filter pockets being interconnected to the main support frame and its interconnecting traversing ribs. This design of the filter element results in a substantial increase in the usage values of the materials involved and favorably contributes to present high environmental standards, at lower long term system costs. This is achieved by using a main support frame which includes interfitting subframes that are detachably connected one to another and to the filter pockets.

Abstract: An air filtration media comprises a single layer of randomly oriented and randomly intermingled synthetic, polymeric resin microfibers, staple fibers and bonding fibers. The microfibers, taken as a whole, have an average fiber diameter no greater than 5 microns and comprise between 50% and 90% by weight of the filtration media; the staple fibers, taken as a whole, have an average fiber diameter between 10 and 30 microns and comprise between 5% and 45% by weight of the filtration media; and the bonding fibers, taken as a whole, have an average fiber diameter between 10 and 30 microns and comprise between 5% and 25% by weight of the filtration media. The bonding fibers have thermoplastic surfaces with a lower temperature softening point than the microfibers and the staple fibers and bond the fibers together to form the air filtration media.

Abstract: An extended pocket type air filter formed of a single rectangular frame enclosing and locking a plurality of parallel header plates each having complementary projections and grooves on opposite edges, the complementary projections of one header fitting into the grooves of an adjacent header and securing pocket type air filter medium between them. A rivet secures ends of the frame to each other about the header plates.

Abstract: A mist collector for separating liquid components from a mist-laden gas stream to include a housing which houses three filter or separation stages. The stream is pumped through ducts into the bottom of the housing, and is pulled upwardly through the filter stages. The third filter stage comprises a commercially available filter assembly with a plurality of filter envelopes having bottom open ends secured across a midposition of the housing and upper closed ends supported adjacent the top of the housing. A doorway provides access to the inside of the housing. The upper closed ends of the envelopes are supported by hanger rods which connect to horizontally movable slides which slide within horizontal channels mounted to the internal side walls of the housing. The slides extend partially out through the doorway to enable the assembly to be connected to and disconnected from the collector outside of the housing.

Abstract: A filter element comprises at least two pleated filtering mediums and at least one roughly flat filtering medium interposed between the pleated filtering mediums. Each pleated filtering medium has an end constituted by edges of triangular bottom sections and the other end constituted by edges of triangular top sections. The triangular bottom sections of one pleated filtering medium is bonded to the flat filtering medium only at and near the edges of the bottom sections. The triangular top sections of the other pleated filtering medium is bonded to the roughly flat filtering medium only at and near the edges of the top sections. Spacers are provided between the top sections and the flat filtering medium and between the bottom sections and the roughly flat filtering medium. Such spacers may be constituted by alternate small ridges and grooves formed in the roughly flat filtering medium.

Abstract: A filter bag enclosure for containing a laboratory animal and a carrier therefor during transportation is provided with lateral and top seals which prevent gaseous communication with the laboratory animal therewithin except through the filter medium which forms the lateral sides of the filter bag. In accordance with the invention, the lateral edges of the filter bag are sealingly joined to one another by the application of acoustic energy. A length of sealing material, which may be polyethylene, is advantageously interposed between the edges prior to the application of the acoustic energy so as to enhance the reliability of the lateral seals. The top portion of the filter bag is provided with polyethylene strips joined thereto, illustratively by the use of ultrasonic acoustic energy. After the laboratory animal and its carrier is installed inside of the filter bag, the filter bag may be closed by conventional heat sealing of the polyethylene top strips.

Abstract: An open-cell, foamed gypsum absorbent for fluids is prepared by foaming a slurry containing plaster, carbonaceous material, and a weak acid. Some of the preferred carbonaceous material include activated carbon, dried blood, comminuted vegetable matter containing chlorophyll, hemoglobin containing heme, and organometallic chelates. Aluminum sulfate is the preferred weak acid.Some of the gases absorbed are carbon monoxide, carbon dioxide, sulfur dioxide, ammonia, formaldehyde, nitrogen oxides, and tobacco smoke.Some of the liquids absorbed are water, salt water, urine, blood, sperm, catemenial exudate, and perspiration.This invention has applications in cigarette filters, gas masks, diapers, wound dressings, hospital or surgical sheeting, and undergarments for incontinent adults.

Abstract: A self-contained dust collector which includes a quick release adaptor duct mounted between a filter unit and a storage receptacle for conveying dust to the receptacle with the quick release adaptor duct comprising a planar member having a central opening and a plurality of pleats which permit the outer periphery of the planar member to either be (1) lengthened as the planar member is moved from a closed duct forming position in which the duct provides a sealed transition duct for conveying dust into the receptacle to an open nonduct forming position spaced away from the receptacle or (2) shortened as the planar member is moved from the open nonduct forming position into the closed duct forming position in which the outer periphery of the planar member is placed under tension to maintain the periphery in sealed relation to the receptacle.

Abstract: Industrial filter for separating solid particles from a streaming gaseous medium the filter having a filter insert formed from a single band of knitted fabric. The filter insert is provided with a smooth permeable layer of amorphous synthetic polymeric material at least on its inlet inside. Longitudinal and transverse packing sleeves of the filter insert are secured to marginal surfaces of a partition wall by means of a pressure sealing frame. Single filter pockets are inserted in the openings of the partition wall and in place between single filter pockets the filter insert sliding rests upon internal surfaces of the partition wall. During operation a certain amount of separated dust is forced into the gaps between the internal surfaces of partition walls and parts of the filter insert surfaces supported by those internal surfaces. Whereby the accumulated dust layer automatically compensates for the stretching of the needled fabric.

Abstract: A filter module comprises a frame bridged by a plurality of spaced-apart arch members, on which is supported a one-piece filter element comprising a plurality of pockets which each enshroud an arch member, and which connect into a mouth portion circumscribing the frame and held in position by a drawstring. The filter module is easily erected, and a seal between the inlet and outlet sides of filter equipment employing the module is easily provided.

Abstract: A pocket filter cartridge for removing solid particulates from a dirty gas stream including a plurality of sheath-like filter bags suspended from a common header assembly in side-by-side relation. Each of the filter bags includes a plurality of alternating rows of filamentary stays or span stitching spaced across the width of the bag and extending generally parallel to one another along its length so that upon inflation of the bag by the dirty gas stream during use, the stays shape the bag into a plurality of adjacent tube-like sections opening into one another within the bag. The stays in each row are sized to be of a different length than the stays in the rows adjacent to it to alternately vary the thickness of the bag at the juncture of the tube-like sections formed in the bag.

Abstract: A dust collecting apparatus with quick release filter support system comprising an enclosure, a bulkhead structure mounted to the interior walls of said enclosure, and defining upper and lower portions of said enclosure, means for the intake and exhaust of air from the surrounding environment in a single direction, a filter cloth assembly comprising a filter cloth affixed to and supported by a frame assembly inserted into said enclosure, and quick release clamping means used to bring said frame assembly into an air tight sealing arrangement with said bulkhead.

Abstract: A pocket filter cartridge having a plurality of side-by-side filter assemblies secured to a common mounting frame adapted to be secured across a dirty gas stream in a gas duct. Each of the filter assemblies includes a sheath-like filter bag suspended from an apertured header plate which is secured to the mounting frame in an overlapping fashion with its adjacent mounting plates to form a common header for all of the filters in the cartridge.

Abstract: A gas filter comprising a square frame and an interchangeable filter package containing a filter web of a folded zig-zag configuration forming a plurality of proximate filter pockets received on a support grid mounted on the frame and having a shape complementary to the folds of the filter web.

Abstract: A pocket filter in the form of a filtering block is provided with an assembly of channels open at one end to receive gas from which dust is to be removed, and is interleaved with the channels of another assembly open towards the other end and delivering the gas from which the dust has been removed. These channels have a generally square-shaped cross-section, and are connected to each other, for example by stitching lines, along their edges. During operation, the initial shape provided for the cross-section of the channels of the two above mentioned assemblies is maintained by tensioning these two assemblies with tensioners or the like, on which are fixed the edges of the outer channels of the filtering block.

Abstract: The present invention refers to the mounting of filter bags and the like of the kind comprising the mounting of such filter bags in a frame which holds them by means of a holding ring and which applies pressure against the outer walls of the frame, securing the lip of the bags between the body of the frame and the holding ring.

Abstract: A plurality of separate V-shaped wire mesh members are arranged and connected in side-by-side relationship to provide a plurality of V-shaped cells across an air stream. A W-shaped retainer or connector formed of perforated sheet metal has outer, downstream facing trackways which receive side edges of the wire mesh members, and a central, upstream facing trackway which receives and retains the free edges of V-shaped filter media bags which are inserted into the V-shaped cells overlying the wire mesh. A stabilizer bar extends across and attaches to the exposed adjoining edges of the V-cells to support the cells in proper relation and retain the filter media in place.

Abstract: An apparatus for the separation of particles from a gas of the type which has filter elements disposed around a drum located in the center of a housing with a shutter mechanism. The improvement of the present invention also relates to an apparatus which allows separation and emptying of filter elements by the shutter mechanism and particle separation without venting of particles to the atmosphere. The apparatus is particularly useful for instance, for asphalt mixing plants, stone quarry or foundry dust separation and collection.