Abstract: A method and a system to assemble a plurality of filter bags within one another using a pole and a pulling guide, and a filter bag unit which includes a plurality of assembled filter bags with creases and stitches oriented relative to each other.

Abstract: A filter including a container and a basket which is contained in the container and has mounted thereto a bag-like filter element and filtering liquid to be processed by allowing the liquid to pass through the filter element. The filter includes an upper tubular section forming the upper part of the basket and having an upper end open, and an annular seal mounted inside the container and held between the upper tubular section and the container. The upper tubular section has a first fitting surface having an outer diameter decreasing downward. The seal has a second fitting surface having an inner diameter which decreases downward and engaging with the first fitting surface. When the seal receives force acting outward radially from the upper tubular section, compressive deformation of the seal is limited to a predetermined amount.

Abstract: A dust-collecting apparatus is described that includes a lift-off door assembly that provides access to the interior of the dust-collecting apparatus while minimizing the adverse effects on the normal operation of the apparatus by maintaining a proper seal between the interior and the exterior of the apparatus. In particular, the lift-off door assembly includes a top plate, a door frame, and a bottom plate. The top plate is secured to the door frame. Lift clips are provided about a perimeter of the bottom plate and are secured to the bottom plate. Lifting ends of the lift clips are positioned over an outer portion of the door frame, such that when a lifting force is applied to the top plate, the top plate, door frame, and bottom plate are lifted together via the lift clips to move the lift-off door assembly from the closed position to the open position.

Abstract: A duct filter bag used in connection with a heating and air conditioning vent, the duct filter bag including a filter body constructed of a material that is air permeable yet catches particles exiting the vent, the filter body having a perimeter; an attachment assembly connected to the filter body; where the filter body is extendable outward relative to the attachment assembly to define a filter volume; the attachment assembly being adapted to attach the filter body such that the filter volume is in registry with the vent.

Abstract: An exterior duct filter retainer used in connection with a heating and air conditioning vent, the duct filter retainer including a filter body constructed of a material that is air permeable yet catches particles exiting the vent, the filter body having a an attachment assembly connected to the filter body; the attachment assembly being adapted to attach the filter body such that the filter is against and/or in registry with the vent. The filter body can be flat, and the attachment assembly can use a variety of means to attach the filter body in registry with the vent.

Abstract: A fluid pressure vessel has a chamber with an inlet and outlet with a nested primary and secondary filter bag disposed such that the primary bag communicates exclusively with the inlet, and flow through the primary bag flows through the secondary bag before the outlet. The primary bag is disposed in a first rigid porous basket and the bag rim seals against a flange on the first basket. The secondary filter bag surrounds the first basket and the rim of the secondary bag is sealed around the flange of first basket. A second rigid porous basket surrounds the secondary filter bag and is sealed on the rim of the secondary filter bag and is sealed against the inner periphery of the pressure chamber by an O-ring.

Abstract: A filter pipeline for an air intake system of an internal combustion engine has a tubular body and a filter element arranged in the tubular body. The filter element is a filter bag of a flexible material that has an opening and is attachable in the area of the opening to the tubular body. The filter bag and an inner wall of the tubular body are provided with ribs projecting inwardly from the tubular body such that in a circumferential direction of the pipeline different spacings are provided between the filter bag and the inner wall of the tubular body.

Abstract: A filter arrangement, for cleaning gases contaminated with particles, has at least one filter unit with an exterior and an interior filter (3.1, 3.2), wherein the exterior and interior filters can be moved relative to each other, thereby exposing an opening (3.4) in the bottom regions thereof. This allows cleaning of filter units at the site of the filter units without disassembly of the same (cleaning in place—CIP). A method for cleaning is provided in that the region of the filter unit on the clean gas side including introducing a fluid sprayed via a cleaning lance protruding into the clean gas region while exposing a gap (3.4) in the bottom region of the exterior and interior filters.

Abstract: A filter is provided and includes filter media folded into itself to have increased surface area formed of at least two filtering sections including an outer filtering section and an inner filtering section.

Abstract: A multi-layer bag assembly is used with a housing for collecting particles from air flowing through the multi-layer bag assembly. Multi-layer bag assembly includes at least two bags arranged one inside the other. Each of the bags includes an air permeable filtering material for collecting particles carried by air flowing through the material. The air permeable filtering material being may be the same or different for the at least two bags. The multi-layer bag assembly includes structure for holding the at least two bags in a wide open position. The structure may be a cooperating bag structure incorporated in the at least two bags for cooperating with the housing for selectively holding the respective bags in their respective open conditions. The structure may also be a removable collar attached to at the open portion of the at least two bags, where the removable collar is part of an integral collar of the multi-layer bag assembly.

Abstract: A filtration assembly for use with a suction cleaning device, the filtration assembly including a housing body for housing one or more filters; and a motor driven impeller which generates suction for drawing air and any entrained material into an inlet through the one or more filters and discharging the air through an outlet; wherein the one or more filters includes a first bag filter received by the housing body, the first bag filter including a base portion and a side portion which define a cavity for holding any material that cannot pass through the first bag filter; and, wherein the side portion of the first bag filter is laterally spaced apart from a wall portion of the housing body such that a gap is formed between the side portion and the wall portion.

Abstract: Provided is a filter bag for use in a dust collector which increases a filter area greatly even with a simple structure, and which makes size of the dust collector compact, to thereby reduce an installation area of the dust collector, and uniformly distributing an air pressure to thereby increase a dust removal effect as well as to enable a worker to easily manufacture the dust collector regardless of a quality of a material to thus provide a wide application range.

Abstract: A filter element (1) with a tubular folded bag (2) of folded filter material, which has a plurality of fold blades (3) adjacent each other in the longitudinal direction (10) of the folded bag (2) a closure cover (4) is attached at at least one axial end (7) of the folded bag (2). In order to provide a filter element which can be bent to any desired curved form while maintaining a high degree of filtration performance, and can be produced in a cost effective manner, the fold blades (3) of a folded bag (2) are provided with a combination of diagonal folds extending at an angle relative to each other such that the fold blades (3) in the longitudinal direction (10) of the folded bag extend back and forth and thereby form a three-dimensional crown structure (18). At least the outer margin of the closure cover (4) has a form corresponding to the crown structure (18) of the fold blades (3).

Abstract: A vacuum cleaner bag includes a bottom part having a substantially rectangular base section. A projecting section is disposed proximate to at least one side of the base section. The projecting section, when folded up for the storage position, rests on the base section. Sidewall sections extend peripherally in a direction away from the bottom part to form an inside space.

Abstract: A novel sanitary and odor free workstation having two spaced apart, transparent plate members that are operatively interconnected to a vacuum source and in combination define a vacuumed air evacuation area that functions as a workstation between the plate members. Thus, a user can easily position an object of choice within the workstation, or even adjacent thereto, and have hands free controlled access that allows manipulation of the object yet protects the user, and others, from physical or airborne transference of bacterial matter and from any undesirable odors emitting there from and also protects the user's eyes from any potential damage, respectively. Furthermore, the workstation is portable, self-contained, safe, sanitary and is substantially usable with any object of choice.

Abstract: A filter bag assembly includes an outer bag having an open end, a closed end opposite the open end, and a longitudinal axis. The open end of the outer bag is sized and shaped for receiving liquid to be filtered. A filter member is loosely mounted in the outer bag and has a pair of opposed open ends and a plurality of longitudinally extending pleats. Each of the pleats projects generally outwardly in a radial direction.

Abstract: A filter wrap for a cylindrical filter has a sheet with an interior side facing the filter when the sheet is wrapped on the filter, and an exterior side. It also has an edge defining a main opening to the interior for receiving the filter. At least one strap is provided for the wrap with one end attached to the sheet. The strap has another accessible distal end. Pulling on the strap(s) everts the sheet as it is pulled off of the filter. This results in trapping debris residing on the exterior of the sheet within the sheet once it is everted during removal of the wrap from the filter. Installation and removal can be performed while the protected equipment remains in operation.

Abstract: A filter for a spa or pool, having a filter body which receives a filter bag having a sheath encompassing the exterior of the filter body and a pocket extending inwardly from the front end of the sheath into the filter. Operation of the spa water circulation system draws spa water into the filter bag pocket while concurrently spa water is drawn transversely through the filter bag sheath and auxiliary spa water openings into the filter body. An O-ring encircles the upper portion of the filter bag to releasably retain such bag to the filter body during operation of the spa water circulation system.

Abstract: A stainless steel filter assembly which filters fluid entering a fluid interactive device, such as a gas analyzer, includes a connection block in the line which has lateral ports for coupling with an inlet coupling and an outlet coupling on a filter. The filter has a folded filter media made of sintered stainless steel panels which are separated by stainless steel screens that increase the surface area of the filter media exposed to the inlet stream of fluid to be filtered.

Abstract: A filter for a spa or pool, having a filter body which receives a filter bag having a sheath encompassing the exterior of the filter body and a pocket extending inwardly from the front end of the sheath into the filter. Operation of the spa water circulation system draws spa water into the filter bag pocket while concurrently spa water is drawn transversely through the filter bag sheath and auxiliary spa water openings into the filter body. An O-ring encircles the upper portion of the filter bag to releasably retain such bag to the filter body during operation of the spa water circulation system.

Abstract: A powder receiving device has a loading chamber with an integral dust collector. The dust collector preferably includes at least one bag filter which filters air taken from above powder loaded into the loading chamber. The filtered air is then fed either back into the loading chamber, into a hopper where the powder is released to an external location, or out over the container from which the powder is loaded. This air flow provides for increased fluidity of the powder. The bag filter is positioned facing the loading chamber, such that when a backwash mean sends a pulse of air into the bag filter, the collected powder is dropped back into the loading chamber. The resulting powder receiving device prevents powder from escaping when powder is transferred from a container into the loading chamber. Since the powder is prevented from escaping, the powder receiving device further provides a clean workplace.

Abstract: A vacuum cleaner apparatus (10) is provided which includes a vacuum motor (16), an air pervious membrane (26) and an air pervious material collection bag (22). The vacuum motor (16) is arranged to draw air downwardly in turn through the bag (22), the membrane (26) and the motor (16) so that, in use, the bag (22) retains material entrained in the air. There is also provided a spacing means (28) located intermediate the membrane (26) and the bag (22) for orienting the bag such that a first portion (35) of the bag is adjacent the membrane and a second portion (32) of the bag is spaced from the membrane.

Abstract: The air filtration device for use with a roof drill has an air intake block attached to a vertical support abutting the mine roof lateral to the drill hole. A flexible hose attached to a dust filter and a vacuum source for filtering and collecting dust from the air before exhausting the air to the atmosphere is connected to the air intake block. The air intake block has a plurality of holes defined in at least one face of the block for the intake of dust laden air and an air passage within the block in communication with the vacuum source provided by the flexible hose. The holes defined in the air intake block may be covered by screens to prevent the entrance of large particles into the air intake block. The air intake block is disposed to provide sufficient suction lateral to the longitudinal axis of the drill steel in order to remove fine particles of quartz and dust from the air adjacent the entrance of the drill hole.

Abstract: A vacuum bag scenting system is disclosed including a vacuum bag having a pair of faces which are spaced apart upon inflation of the vacuum bag. A closed cellophane bag is disposed in the vacuum bag and coupled to each of the faces of the vacuum bag. A scent pad is disposed in the cellophane bag and is also coupled to a portion of the cellophane bag adjacent one of the faces of the vacuum bag. Inflation of the vacuum bag causes the faces of the vacuum bag to spread apart from each other and in turn tear the cellophane bag apart to expose the scent pad therein to permit releasing of scent from the scent pad into the vacuum bag.

Abstract: A prefilter bag for insertion into a standard filtration bag apparatus, having a filtration assembly comprising a seamless filter membrane having uniform pore openings preselected within the range of between about 2 and about 50 microns (.mu.) and a linearly channeled, non-deformable, semi-rigid liquid transport thermoplastic sheet in the form of a molded webbing or netting in contact with the upper surface of the filter membrane; said webbing having marginal edges which are coextensive with those of the membrane; said assembly adapted to be shaped by continuous winding of the assembly upon itself for 2 to 5 complete convolutions around a tubular mandrel so as to form a cylindrical tube or cone; the bottom of said cylinder being sealed to prevent liquid leakage and the top of said cylinder, forming a liquid inlet opening, being sealed to a retaining ring adapted to be inserted in, attached to or sealed to an outer, retaining ring of a non-wrapped filter bag.

Abstract: A filter cleaning system for a vacuum that includes a housing that is open across its top end and is arranged to be covered by a removable lid whereon is mounted a vacuum source. The housing includes a hose port for connection to a vacuum hose, and the housing can be mounted on wheels, casters, or the like. A double filter system, that includes separate primary and secondary filters, is arranged within the housing, with the secondary filter mounted across the vacuum source inlet, and with the primary filter, that is a bag connected to the lid undersurface, for containing the secondary filter and a filter support. The filter support is a rigid fame connected at a fight angle to an end to a straight rod that extends through the lid to be manipulated by an operator to move the filter support so as to engage surfaces of both the primary and secondary filters, to vibrate and shake collected particles therefrom.

Abstract: In a vacuum bag for a vacuum cleaner having a dirt-laden air outlet, the vacuum bag includes an air-permeable outer bag formed of paper, an air-permeable inner bag formed of meltblown material disposed within the outer bag, and an air-impermeable collar disposed on an outer surface of the outer bag. The inner bag, outer bag and collar define therethrough a channel of given area for passage therethrough of a dirt-laden air outlet into the inner bag. The improvement resides in the vacuum bag additionally including an air-impermeable reinforcement patch formed of flashspun olefin material disposed opposite and at least partially below the channel when the vacuum bag is in use. Thus a portion of the outer bag generally opposite the outlet is protected from penetration and tearing by particles entrained in the dirt-laden air expelled at high speed from the outlet.

Abstract: Vacuum cleaner canisters and vacuum cleaner filter bags are provided with weir members disposed in the path of particle laden air flowing through the vacuum cleaner. The particle laden air flows across the top and/or side edges of the weir members creating a pressure drop thereacross and an area of low pressure on the downstream sides of the weir members whereby particles in the airstream are influenced to drop out of the airstream and into the low pressure areas.

Abstract: Disclosed is a porous device adapted to remove particulates from a fluid passed through the device. The device includes a porous filtration medium. The medium has a first surface having an area which is adapted to receive the fluid for passage through the medium and a second surface from which the fluid exits the medium. The device is configured to variably increase the area of the first surface in response to a differential in fluid pressure between the first surface and the second surface so as to extend the life of the device. In some embodiments the device is adapted to retain the increase in surface area which acts as a visual indication that the device is reaching its capacity to retain particulates.

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 vacuum cleaner filter bag having multiple, nested inner bags and an outer bag for sequentially filtering a discharge from a vacuum cleaner, wherein each of the inner bags is adapted to cease filtering the discharge therethrough when the bag has become clogged with particulate matter. Each inner bag is designed to rupture, when clogged, in a manner to allow the discharge to bypass that bag and directly enter the next bag.

Abstract: A filter apparatus having a filter bag subassembly for collecting contaminating material. The filter bag sub-assembly includes five diametrically and axially-spaced bags and an integral collar. The five spaced bags form five spaced chambers and the integral collar has a stepped shape forming five cylinder support portions for the five spaced bags.

Abstract: A cylindrical filter bag including a wire mesh cage is provided with an access opening in the cage proximate to the open end of the filter bag. A resilient snap band is provided around the outer circumference of the cylindrical filter bag. The snap band includes a pair of felt rings formed around the band and an annular groove between the rings. The snap band thus provided can be depressed into the access opening in the wire mesh cage to allow the filter bag to be readily positioned in an airtight manner within a circular hole provided in the tube sheet of a dust collector. The hole in the tube sheet is provided with a collar having a radially extended flange portion that is attached to the top surface of the tube sheet to center the collar above the hole. The wire mesh cage of the filter bag is further provided with a reinforcing sleeve that mates with the tube sheet collar, and a venturi that is positioned concentrically within the sleeve.

Abstract: A compact exhaust gas treating apparatus which is improved in the bag filter performance in order to reduce the amount of dioxin contained in exhaust gas discharged from municipal refuse incineration equipment, industrial waste incineration equipment, etc. An activated carbon filter is disposed along the filter cloth of the bag filter at the purified gas outlet side of the filter cloth so that exhaust gas passes through the activated carbon filter after passing through the filter cloth, thereby being purified.

Abstract: A physical compact vacuum pickup device of critically safe volume and geometric shape is provided for use in radioactive enclosures, such as a small glove box, to facilitate manual cleanup of either wet or dry radioactive material. The device is constructed and arranged so as to remain safe when filled to capacity with plutonium-239 oxide. Two fine mesh filter bags are supported on the exterior of a rigid fine mesh stainless steel cup. This assembly is sealed within, and spaced from, the interior walls of a stainless steel canister. An air inlet communicates with the interior of the canister. A modified conventional vacuum head is physically connected to, and associated with, the interior of the mesh cup. The volume of the canister, as defined by the space between the mesh cup and the interior walls of the canister, forms a critically safe volume and geometric shape for dry radioactive particles that are gathered within the canister.

Abstract: An upright vacuum cleaner having a filter bag housing assembly comprised of a fabric or otherwise flexible and air permeable bag housing resiliently supported at its bottom end relative to the operator handle such that the bag housing is always in tension and is prevented from twisting about the axis of the operator handle. The bag housing assembly includes rigid upper and lower frame members thereby maintaining the assembly in a prescribed geometric shape. The lower frame member which defines the bottom of the bag housing includes a pair of laterally disposed elongated track members telescopically disposed within respective guide track members fixed to the handle and resiliently biased relative to the respective guide track member to thereby maintain the bag housing in tension and provide lateral stability to the bag housing at the same time.

Abstract: An improved fluid filtering apparatus having an inlet, an outlet, a sealed housing, an outer bag within the housing, an inner bag generally concentric to and suspended within the outer bag, a filtering medium retained inside the outer bag and outside the inner bag and a flow path which channels the fluid radially inward through the outer bag, the filtering medium and the inner bag to a channel in a perforated tube which supports the inner bag. The apparatus is designed to permit the fluid pressure to radially compress the filtering medium to substantially increase the filtering effect.

Abstract: For installing a dry material paper filter on the filter cage of an electric vacuum cleaner, a disk of porous paper filtering material or of cloth type fabric is laid over the panel enclosing the bottom of the filter cage and a ring is pressed up over the paper or cloth filter and over the panel. As the ring is drawn up over the filter cage, it folds and presses the paper or cloth filter around the filter cage. At the top of the filter cage, the ring secures the filter to the cage. An additional filtering sleeve may be disposed around the filter cage before the filter is installed over the cage and over the sleeve with the attachment ring. The sleeve may be of foam or other wet material filtering material. The filter installed with the ring is of dry filtering material, like paper or cloth. A marking or disk at the center of the filter helps a user place the filter over the filter cage before the ring is used to fold the filter into place.

Abstract: Bag for receiving a gas stream containing solid particulate and undesirable gaseous components, consisting of inner and outer tubular porous walls arranged coextensively to define a space between them, which space is divided at discrete intervals into compartments containing solid particles of chemical to treat the gaseous components.

Abstract: A vacuum cleaner uses a special self-cleaning filter arrangement including an initial fabric filter having a relatively large mesh size with a broad open mesh ratio of 5 to 15% and a total opening area of 5 to 45 times the cross section of the inlet, which inlet faces away from the filter. The initial filter is preferably backed up by secondary filters and is arranged so that dirt collected on the filter is periodically sloughed off and dropped into a receptacle after building to a critical level.

Abstract: A filter device, usable as a self-contained or freestanding unit or in association with an associated air treatment installation such as a furnace or air conditioner.A preferred embodiment has a housing in which is supported a parallel-arranged plurality of filter bags folded over to achieve high filter area in comparison to the size of the housing; and ductwork leads the incoming air to the filter bags, which are formed of HEPA paper for screening out even extremely small particles.The housing is hermetically sealed; and there is provided a blower for drawing in air, and causing it to pass through the filter bag system and into the interior of the housing, and then out the housing outlet for entrance to the associated air treatment installation.

Abstract: A flexible fabric filter apparatus having multiple support surfaces for shaping a flexible fabric filtering element into a compact shape and in which apparatus the support surfaces assist in sealing the filtering element to the filter housing between the inlet and outlet of the filter housing. A method for assembling a filter apparatus having a flexible fabric filtering element which method includes the steps of manipulating the filtering element to form inner and outer filtering sections, mounting the inner and outer filtering sections on corresponding inner and outer support surfaces, and sealing a filter section with the filter housing at a point between the inlet and outlet of the filter housing.

Abstract: A special bag assembly provides a primary material collection receiver to efficiently, effectively, and safely collect, remove, and dispose asbestos and other hazardous material without exposing surrounding personnel to the collected asbestos or other hazardous material. The primary material collection receiver can have a porous or perforated inner bag positioned within the interior of a solid imperforate bag, a perforated inner shell to accommodate expansion of the bags, a shroud to prevent hazardous material from contaminating the outside of the outer bag, and a vacuum tank surrounding the shroud.

Abstract: The invention is directed to a safety filter for an outlying filter cartridge of a hand-guided vacuum cleaner. The filter cartridge includes a rigid air-permeable jacket and accommodates a paper filter bag which is seated in the jacket. The safety filter is a bag corresponding to the form of the jacket and is made of electrostatically-charged non-woven fabric. The safety filter is mounted between the jacket and the paper filter bag.

Abstract: A filter medium for treating exhaust gases is described. The filter medium comprises a porous ceramic substrate, a pre-coat layer of a reaction aid and a layer of a solid material formed on one side of the substrate from which the exhaust gas is charged through the substrate, and a catalyst layer for eliminating nitrogen oxides formed on the other side of the substrate from which the exhaust gas is discharged. The filter medium may have a double-cylinder construction, in which the catalyst layer is formed on at least one side of a inner cylinder and the pre-coat layer and the solid material layer are formed on an outer side of an outer cylinder.

Abstract: A special bag assembly provides a primary material collection receiver to efficiently, effectively, and safely collect, remove, and dispose asbestos and other hazardous material without exposing surrounding personnel to the collected asbestos or other hazardous material. The primary material collection receiver has a porous or perforated inner bag positioned within the interior of a solid imperforate bag, a perforated inner shell to accommodate expansion of the bags, a shroud to prevent hazardous material from contaminating the outside of the outer bag, and a vacuum tank surrounding the shroud.

Abstract: A filtering apparatus for separation of solids from a solid carrying fluid arranged in a housing and having a material flow inlet. The housing is divided into an upper collector chamber and a lower area by an intermediate separating wall. One or more candle filters made up of two concentrically arranged metal fabric filter cylinders defining an annular space therebetween the arranged in a material flow area of the housing and may be surrounded by an immersion tube. A plurality of Laval nozzles are arranged above each candle filter in the collector chamber and are utilized for producing an enhanced injection reverse flushing effect to remove solids adhering to the candle filters. The annular cylindrical configuration of the candle filters greatly enhances the filtering surface area.

Abstract: A bag is shown for use with an upright vacuum cleaner of the type having a motor fan contained in a main housing for producing an air flow out an air duct of the housing. The bag includes a flexible body having side walls formed of an air pervious material which define a normally closed interior and a mouth opening. The mouth opening of the flexible body is secured to the air duct of the main housing to produce an air flow through the flexible body for exhaust to the atmosphere. An oscillator tube, formed of a flexible material, has an interior, an open end at one extent and an intake opening at the opposite extent. The intake opening is arranged to communicate with the mouth opening of the bag body so that the air flow from the main housing passes through the oscillator tube and causes oscillations, the oscillations of the tube serving to vibrate the bag and prevent the buildup of dirt on the bag interior side walls.

Abstract: A double walled vacuum cleaner filter having a reusable inner bag with a zippered opening for debris removal.

Abstract: A resilient support sustaining the upper terminus of a dirt collecting bag on the handle of an upright vacuum cleaner in which an extensible strap on the bag is fastened within a downwardly open recess on the handle maintaining the upper terminus of the bag completely within the handle recess.