Abstract: A vacuum cleaner includes a housing having a filter bag cavity. A suction generator and a bag mount are both carried on the housing. Additionally, the vacuum cleaner includes a bag caddy that is displaceable between an operating position connected to the bag mount and a bag disposal position disconnected from the bag mount.

Abstract: A continuous pressure letdown system connected to a hopper decreases a pressure of a 2-phase (gas and solid) dusty gas stream flowing through the system. The system includes a discharge line for receiving the dusty gas from the hopper, a valve, a cascade nozzle assembly positioned downstream of the discharge line, a purge ring, an inert gas supply connected to the purge ring, an inert gas throttle, and a filter. The valve connects the hopper to the discharge line and controls introduction of the dusty gas stream into the discharge line. The purge ring is connected between the discharge line and the cascade nozzle assembly. The inert gas throttle controls a flow rate of an inert gas into the cascade nozzle assembly. The filter is connected downstream of the cascade nozzle assembly.

Abstract: A transparent foldable dust bag is designed as an attachment for a vacuum cleaner and like. The transparent foldable dust bag has a foldable outer transparent wall portion and a foldable inner filter cone portion connected by the top connector and the bottom flange to form a hollow cavity for separating and collecting dirt and dust from air. Opened dust bag is deployed and stretched by the rigid top connector and bottom flange for keeping the shape of the dust bag in a designed position. See through the outer transparent wall of the dust bag allows to look filling level inside of the dust bag and to replace it properly without exposing collected dust and dirt.

Abstract: The invention relates to a filter module in the form of a hollow body with at least one chamber. The walls of the hollow body are made of a non-metallic material that can be comminuted and/or disintegrated in a recycling process. The material is a paper product, such as cardboard, paper or paperboard, or a fibrous material, such as wood or pressboard material.

Abstract: A thermal mixer reduces the temperature of flue gas supplied to a fabric filter. Two spray dry absorbers are operable to cool flue gas. A housing of the mixer has first and second inlet passages for gas from the absorbers, an outlet passage for gas to the fabric filter, and a mixing passage. A set of damper vanes extends in the mixing passage and has a mixing position for mixing the flue gases from the inlet passages to supply mixed gas to the outlet passage at relatively high pressure drop but lower temperature if one of the absorbers in not operating. They have a non-mixing position for passage of gases without mixing and at low pressure drop when both absorbers are operating. The invention can also be used to improve mixing of combined gas streams initially having different chemical compositions or amounts of particle loading.

Abstract: A thermal mixer reduces the temperature of flue gas supplied to a fabric filter. Two spray dry absorbers are operable to cool flue gas. A housing of the mixer has first and second inlet passages for gas from the absorbers, an outlet passage for gas to the fabric filter, and a mixing passage. A set of damper vanes extends in the mixing passage and has a mixing position for mixing the flue gases from the inlet passages to supply mixed gas to the outlet passage at relatively high pressure drop but lower temperature if one of the absorbers in not operating. They have a non-mixing position for passage of gases without mixing and at low pressure drop when both absorbers are operating. The invention can also be used to improve mixing of combined gas streams initially having different chemical compositions or amounts of particle loading.

Abstract: A simple dust collector includes a housing, a base plate horizontally separating the interior of the housing to form a motor chamber for fix a motor to rotate a fan covered by a fan cover under the base plate. A sucking passageway and a wind-exhausting hole are formed under the fan cover, and a tube joint is connected with the sucking passageway connected to a dust tube. The plurality of wind outlets are formed in a lower section of the housing and sealed by an airy cloth ring to filter dust from wind. The housing has an opening in a lower side and the opening is fitted with a dust bag for dust carried by the wind generated by the fan from the passageway and swirled by centrifugal force caused by rotation of the fan to fall and be collected in the dust bag.

Abstract: An apparatus for removing constituents from a fluid stream is provided. The apparatus includes a duct, a collection device, a sorbent injector, and an acoustic generator. The duct has a fluid passageway to receive a fluid stream having constituents. The collection device filters the fluid stream. The sorbent injector injects a sorbent in the fluid passageway of the duct. The acoustic generator generates an acoustic field in the fluid passageway of the duct to promote sorption of the constituents for collection by the collection device. Additionally, a method is provided for removing constituents from a fluid stream.

Abstract: A filter to clean the air entering an alternator in a vehicle used in a dirty environment such as a crop harvesting machine includes a mesh filter which is coupled to an air intake of the alternator. The filter is constructed of a mesh material which is flexible and includes relatively small apertures. The apertures prevent chaff and other extraneous material from entering the alternator, while allowing air to flow freely into the alternator, preventing overheating. The flexible mesh sleeve can be vibrated during operation, as, for example, by the flow of air from the engine fan, to provide a self cleaning function in which the vibration causes extraneous material to be shook from the filter.

Abstract: A thermal mixer reduces the temperature of flue gas supplied to a fabric filter. Two spray dry absorbers are operable to cool flue gas. A housing of the mixer has first and second inlet passages for gas from the absorbers, an outlet passage for gas to the fabric filter, and a mixing passage. A set of damper vanes extends in the mixing passage and has a mixing position for mixing the flue gases from the inlet passages to supply mixed gas to the outlet passage at relatively high pressure drop but lower temperature if one of the absorbers in not operating. They have a non-mixing position for passage of gases without mixing and at low pressure drop when both absorbers are operating. The invention can also be used to improve mixing of combined gas streams initially having different chemical compositions or amounts of particle loading.

Abstract: A multi-stage collector of the type used to collect particles from industrial gas. The collector can contain multiple narrow and wide zones formed by a plurality of parallel corrugated plates. Contained in the narrow zones can be elongated electrodes with sharp leading and/or trailing edges. These electrodes can provide a non-uniform electric field near their sharp edges leading to corona discharge. The corona discharge causes particulate matter in the gas flow to become charged. The region in narrow zones away from the sharp edges of the electrodes resembles a parallel plate capacitor with relatively uniform electric field. In this region, particles can be collected on the plates and on the electrode. Wide regions can contain barrier filters (bag filters) with conductive surfaces. The collector can also be used to clean inlet gas in gasification plants and to collect re-usable materials from a gas stream.

Abstract: The invention concerns a permeable material containing a fibrous composition consisting of organic and/or inorganic fibres characterised in that it further contains between 0.1 and 10 g/m2, advantageously 1 g/m2 of activated carbon fibres whereon is adsorbed a germicidal agent.

Abstract: An air duct system includes a conical fabric filter disposed within a cylindrical air duct. In some embodiments, both the filter and the air duct are inflatable. A fabric collar and a pair of zippers not only allow the filter to be readily removed for cleaning, but also allow the air duct system to continue operating with the filter removed. Pleats can provide the filter with more surface area, and the pleats can be interconnected in an alternating pattern to inhibit the filter from over-inflating.

Abstract: A mounting collar is for supporting a vacuum cleaner filter bag in a mounted condition over a vacuum cleaner fill tube. The fill tube has a cylindrical outer surface. A panel of the mounting collar is configured to be attached to the filter bag. The panel has a first inner edge defining a first opening for receiving the fill tube. An elastomeric diaphragm of the collar extends across the first opening. The diaphragm has a second inner edge defining a second opening. The second inner edge is configured to be elastically stretched circumferentially about the fill tube and to be in contact with the cylindrical outer surface about the entire circumference of the cylindrical outer surface when the first opening receives the fill tube. A lobe of the diaphragm is defined by the second inner edge and a baseline. The baseline extends from a first point on the second inner edge to a second point on the second inner edge and is located entirely on the diaphragm.

Abstract: A nonwoven fabric is formed of polyphenylene sulfide fibers impregnated with a synthetic resin by 5 to 50 wt % based on the total weight of the nonwoven fabric, and has stiffness based on the Gurley method specified in JIS L 1096 of 3000 to 10000 mgf, and can be used as a filter medium for collecting hot dust emitted from refuse incinerators, coal boilers, metal melting furnaces, and others.

Abstract: A filter for air extraction apparatus is disclosed, which is assembled from a porous material arranged to collect contaminants. The filter comprises a bag with a constricted inlet for receiving contaminated air. The bag is formed from a plurality of envelopes having filtering side walls and each of the envelopes has at least one orifice connected to an orifice of an adjacent envelope.

Abstract: A bag for vacuum sealing from which air is sucked up by a suction nozzle which is connected to a suction pipe or a suction horse of a vacuum cleaner. This bag has a small bag for air suction, and the suction nozzle is inserted in this small bag. The small bag is made of two resin films and is opened and closed by a zipper composed of a protrusion and a groove. The suction nozzle has a rear connecting portion with a check valve inside and a front portion with a suction hole, and the rear portion is to be connected to a vacuum cleaner. The rear connecting portion stands upward. The front portion is spatular and has a suction hole which opens downward. The outer circumference of the front portion where the suction hole is provided is almost equal to the inner circumference of the portion of the small bag where the suction nozzle is inserted.

Abstract: A filter for air extraction apparatus is disclosed, which is assembled from a porous material arranged to collect contaminants. The filter comprises a bag with a constricted inlet for receiving contaminated air. The bag is formed from a plurality of envelopes having filtering side walls and each of the envelopes has at least one orifice connected to an orifice of an adjacent envelope.

Abstract: A sealable debris bag includes a bag body having an opening, and a plate member attached to the bag body proximate the opening. First and second portions of the plate member are pivotable along a fold-line so that the first portion is engageable with the second portion to substantially seal the opening. A tab on one side of the fold-line engages a notch on the other side of the fold-line to secure the device. The fold-line can be formed in the plate member, to define the first and second portions where the portions are contiguous, or can be formed in the bag body where the portions are non-contiguous. The opening may be formed in a flexible lateral wall of the bag body, or alternately, in an end portion of the bag body. A complimentary alignment structure on plate member mates with an alignment structure on a vacuum to ensure proper alignment of the debris bag on the vacuum.

Abstract: An output duct extension for attachment to an upright vacuum cleaner output sleeve or collar. The output duct extension is constructed to be insertable into the paper fill tube of a disposable paper filler bag. The output duct extension is of a longitudinal length such that when it is inserted into the fill tube and the paper filler bag is contained in a fabric fuller bag of the vacuum cleaner the upper end of the output duct extension is positioned at the approximate top end of the fill tube.

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: An improved vacuum cleaner bag with a mechanism for allowing the user to visually align the coupling opening of the vacuum cleaner bag with the discharge tube of a vacuum cleaner. The vacuum cleaner bag also includes a discharge tube receiving structure positioned opposite the coupling opening for receiving the tube end of the discharge tube when the collar surrounding the coupling opening is being positively seated around a base end of the discharge tube.

Abstract: A dust separator for a vacuum cleaner, in which the bag is sealingly connected to a rigid member that screens-off an air-flow passageway through the vacuum cleaner and has an opening with which the bag connects. The screening member is separate from the bag. Mounted at the orifice of the bag is a flange which functions to prevent the bag from being drawn through the opening in the screening member in the direction of air flow through the vacuum cleaner. The flange can be collapsed to enable it to be passed through the opening in the screening member when the bag is full.

Abstract: A large drum for containing high dispersion, high air content solids for repeated filling and emptying by means of vacuum filling plants and a method for filling them. The drums consist of at least two layers, an inner layer consisting of uncoated air-permeable fabric and an outer layer being coated so as to be dust tight and provide a moisture barrier. These layers being connected to one another by means of a special seam, so that it is possible for the drum to be deaerated solely through this seam. The seam includes an air-permeable dust-retaining filter strip material disposed between the drum layers.

Abstract: There is provided a vacuum cleaner filer bag including at least two sidewalls which sidewalls are joined by seams. At least one first sidewall comprises a film laminate of a heat sealable film layer and a film support layer. At least one second sidewall comprises a filter laminate comprising at least a synthetic fiber filter layer and synthetic fiber support layer where the at least one first sidewall is joined to adjacent sidewalls by thermal seams. The filter layer is preferably a high efficiency microfiber filter media which provides HEPA level performance for the vacuum cleaner bag.

Abstract: Provided is a filter favorably used in high-temperature long-term exposure conditions, for example, in coal boilers, cupola furnaces for steel and cast iron production, cement kilns, aggregate drying furnaces, furnaces for non-iron metals, etc. For the filter, provided are a filter material comprising a web or a web and its support, which contains a polycyanoaryl ether in an amount of not smaller than 5% by weight relative to the weight of the filter material; and a filter material comprising a substrate of polycyanoaryl ether fibers or of polycyanoaryl ether fibers and other organic fibers, and a web of at least one type of fibers selected from polycyanoaryl ether fibers and other organic fibers, wherein the amount of the polycyanoaryl ether fibers is not smaller than 5% by weight relative to the total weight of the substrate and the web.

Abstract: A dust collection/control system is disclosed utilized in a floor polishing machine (10) in the most preferred form. A polishing member (16) for maintaining a floor surface as it is moved along the floor is located and rotated within a housing or shield (186) including a circular, planar portion (92) terminating at its periphery in a downwardly extending flange (94) including a flexible skirt (95) which engages the floor. The rotation of the polishing member (16) within the housing (186) passively generates an air current contained within the housing (186).

Abstract: The present invention relates to a dust and lint collection device. The device is utilized in the collection and disposal of lint, dust or other such material. In its broadest context, the present invention includes a collection sleeve which is adapted for engagement with the opened end of a flexible bag. The material to be collected is inserted through the sleeve and into the bag. The bag can then be disposed.

Abstract: Filtering bags manufactured with materials selected to withstand specific conditions of service which include labels made of materials resistant to such conditions of service which have markings resistant to such conditions of service for the life of the filter bags. The labels are preferably incorporated in the filtering bags so as not to form filtering zones.

Abstract: A cloth bag filter is formed with a generally cylindrical porous sidewall through which a vacuum is drawn for filtering of contaminant from an air stream, an open upper end for connection to the vacuum source, and a generally closed but optionally porous lower end portion. The sidewall is sufficiently flexible such that it collapses radially inwardly when air is flowing therethrough, simultaneously causing the lower end portion of the bag to be drawn upwardly toward the upper end portion. Upper and lower rings are secured to the upper and lower end portions of the bag for radially supporting the end portions. The weight of the lower ring causes the lower portion of the bag to automatically drop when the vacuum source is turned off, thus causing the sidewall to automatically expand outwardly to a generally vertically hanging position, disrupting the cohesion of the contaminant collected thereon, and causing such contaminant to break-up and fall from the filter.

Abstract: A filter arrangement which is employed in a fluid conduit is formed of a filter formed of a permeable filter material connected to a flange seal having an annular portion for engaging with and coupling to the permeable filter medium, and a planar portion for forming a seal which prevents leakage at a flange-type coupler. The planar and annular portions of the flange seal are formed of teflon, as is the filter itself, which may be formed of multiple layers of teflon fabric or filter material, each having a respective filter permeability characteristic. The filter is coupled to the annular portion of the flange seal by a thread which is sewn through the various layers of the filter medium and the annular portion of the flange seal. The thread may itself be formed of teflon, such that the entire filter arrangement is formed of teflon and will resist corrosion. Collapse of the filter is prevented by a rigid tubular support which has apertures therethrough to facilitate flow of the fluid.

Abstract: The present invention provides a bag filter comprising a melt-blown fibrous nonwoven web formed into a bag configuration with a closed end, an open end, an inside surface, and an outside surface. The bag filter is constructed such that (a) the fibrous nonwoven web comprises fibers such that 90% of the fibers have a diameter ranging from a minimum fiber diameter to a maximum fiber diameter which is no more than about three times the minimum fiber diameter, (b) the fibrous nonwoven web as oriented in the bag filter has a tensile strength in the circumferential direction at least about 1.5 times the tensile strength in the longitudinal direction, and/or (c) there is no side seam and an injection-molded thermoplastic elastomer end closure. The present invention also provides a method of treating a fluid by passing the fluid through such a bag filter.

Abstract: An improved composite fiber of fiberglass and polytetrafluoroethylene (PTFE) is provided. The composite fiber comprises a coherent strand of commingled filaments of fiberglass and PTFE which is far more resistant to flex, abrasion, and chemical attack than previous fiberglass fibers. Preferably filaments of expanded PTFE tow yarn and filaments of PTFE are combined through a process of air-jet texturing. The fibers of the present invention have a wide range of possible uses, including being formed into a fabric and employed as filter media.

Abstract: An air filter for a hand held hair dryer employing a stretchable filter material which covers the air inlets of the hair dryer. A circular seal is fixed to one end of the filter material and stretches around the air outlet nozzle of the hair dryer. A second circular seal is fixed to the other end of the filter material at 90 degrees to the other seal and stretches around the handle of the hair dryer. The filter material conforms to the shape of the portion of the hair dryer it covers.

Abstract: A vent bag for a clothes dryer is provided and consists of a pouch with an air filter at its distal end that is releasably secured on a vent pipe of the clothes dryer so that the air filter can catch lint coming out of the vent pipe and recirculate the warm moist exhausted air from the vent pipe for energy conservation.

Abstract: A debris and water vacuum system comprising a vacuum pump, a debris receptacle, a first air filter stage, a second filter stage, and valve means for connecting and disconnecting the second air filter stage from a 40 mesh screen final filter and vacuum pump, selectively.

Abstract: A dust collector housing or baghouse is modified to provide for the removal of increased length filter bags and support cages by providing a removable roof section which is connected to the main housing section by cooperating inwardly projecting flanges formed on the upper transverse edge of the housing section and a lower depending side wall of the roof section. The flanges are accessible from the clean air plenum within the baghouse for insertion and removal of flange connecting bolt assemblies.

Abstract: A pre-filter apparatus for use in conjunction with a vacuum cleaner, and which is used to pre-filter the dirt and dust-filled air by a method of negative pressure filtration in order to substantially reduce the volume of air suspending the same amount of dirt before it enters the vacuum cleaner bag, and to continously self-clean the pre-filter. The result is to obtain air without small, filter-clogging particulates by first aggregating them into larger particles before they get to the vacuum cleaner bag so that what enters the vacuum cleaner bag are big clumps which would not have many small particles that can effectively clog up the filter bag. The invention includes the concept of having a smaller suction force siphon off some air through various pre-filter membranes while a larger suction force pulls the dirt particles away from the pre-filter membranes by a negative pressure to keep them continuously clean and maintain their filtration efficiency.

Abstract: A system for preventing contamination of particulate material in a railroad hopper car during transportation and unloading of the material from the car, comprising transporting the material in the railroad hopper car with a filter on each of the various inlet and outlet openings of the car, then upon reaching the point for unloading, applying a vacuum to draw the material out of the car through one spout with its filter removed, while leaving the filters in place on the other openings in the car to prevent contamination of the product from external sources during transportation and unloading. The preferred filter for the railroad car spouts has a frame, a conical filter bag, and a filter bag support ring for mounting on a spout on the car.

Abstract: The apparatus comprises a hermetically sealed hollow housing (1) accommodating in the interior thereof a flexible filtering member (2) in the form of a hose, the ends of which are turned inside out and attached to the periphery of the inside surface of the housing (1). Cavities (3,4) formed between the hose (2) and housing (1) communicate with a discharge device (8) for discharging the fluid medium being cleaned.Provided in the interior of the housing between the fixed ends of the hose (2) is a partition wall (9) having a slot-shaped opening (10) for the passage of this hose and dividing the interior of the housing (1) into two chambers (12, 13). Each such chamber (12, 13) is connected to the feeding device (17, 21) for feeding the fluid medium being cleaned and to the evacuation device for evacuating filter cake.

Abstract: A vacuum cleaner having an air non-pervious body in the shape of a closed bellows in the suction chamber thereof with one end of the bellows bearing against the dust container, and the other end bearing against a partition separating the suction chamber from a positive pressure chamber housing the motor-fan unit. The bellows communicates with the pressure chamber through a conduit so that the bellows can be brought into communication with the positive pressure side of the fan so that the bellows expands and compresses said dust container and its contents, and thus increases the filling capacity of the dust container. The running costs of operating a vacuum cleaner is thus substantially reduced.

Abstract: A fabric of amorphous silica is provided having greatly improved life for bag collectors at high temperatures. This is accomplished by applying a thin coating of gold on the amorphous silica fibers of which the fabric is made. The gold is non-reactive at high temperature and has sufficient lubricity to lubricate the fibers and prevent abrasion of adjacent fibers by each other. The gold coating additionally helps protect the amorphous silica fibers from devitrification. An additional coating of indium may also be applied to form a liquid film at high temperature for increased lubrication. The coating may be applied by dipping or spraying the fabric.