Abstract: Economical, easy to install and use, and disposable, air filter for an HVAC system. The filter is quasi-universal with respect to the size of the air intake vent over which it can be deployed, and it requires less frequent replacement of filter material than is common with typical throwaway (box-type) air filters. When replacement of filter material is needed, the replacement can be done with less or no direct handling of or exposure to the dirty filter material. In use, the filter maintains relatively consistent cleanliness of the filter material by automatic, periodic scrolling of the filter material to replenish the filtering surface.

Abstract: An air filtration equipment, the air filtration equipment is installed in an ventilation area at an interface between indoor and outdoor spaces of a fixed space, the equipment including: a sensor configured to sense information on inhalable particles in outside air; at least one filtering layer configured to filter out inhalable particles in air entering from the ventilation area into the indoor space; and a control device connected with the sensor and the at least one filtering layer and configured to control the at least one filtering layer to expand according to the information sensed by the sensor, such that the expanded at least one filtering layer covers the ventilation area. Also, a screen window and a window are provided.

Abstract: A method of manufacturing a selected spacing folded, pleated media by preparing a pre-pleated sheet of filter media having pleats with peaks and troughs throughout its length applying an at least one adhesive element along the pre-pleated sheet of filter media; advancing and cutting the pre-pleated sheet of material; compressing the cut length of pre-pleated sheet of filter material, resulting in folding of the pleats and adherence of the pleats into a folded, pleated filter media stack that is selectively separable; selectively separating the media stack and selecting a pleat spacing for a selected pleat spacing section application of an at least one spacing support element at the peaks of each pleat and refolding and recompressing into a selected spacing folded, pleated media stack wherein the media stack is adhered and can be selectively removed to extend from a compacted state to a deployed state with the selected pleat spacing.

Abstract: In embodiments, an air filter apparatus includes a base structure (210), an air propulsion mechanism (220), and an adhesive air filter (ADAF) (240) that has an adhesive surface (242). The air propulsion mechanism may establish an air flow (252, 254, 256, 258). The base structure may be configured such that the air flow goes past a vicinity (222) of the adhesive air filter (240), and at least some of the particulates (262, 264) in the flowing air impact the adhesive surface (242), and thus become adhered to it and captured by it. The adhesive air filter could be made from commercially available adhesive tape that is discarded when saturated. Since it is impervious to air, small particulates can be captured upon impact economically. Embodiments may purify the air in enclosed spaces such as homes, offices, and passenger compartments, preventing health problems. Embodiments may further reduce pollution from chimneys.

Abstract: A replacement filter deployed within a flow channel with a housing having a first of two or more frame members and a second of two or more frame members that are detachable with an exposure slot formed within the housing. A filter media storage area is within the housing, having unexposed, folded, pleated filter media stored therein. The unexposed folded, pleated filter media is compactly held within the filter media storage area. A motor is coupled to a power supply and in communication with a controller. The motor moving a movement member that advances an unexposed portion of the stacked pleated filter media into the exposure slot, expanding and exposing the unexposed portion of the media to the flow channel while retaining pleats and creating an exposed portion of the filter media. A containment area is provided where the exposed portion of the pleated filter media is collected folded, restacked and compactly stored and retained.

Abstract: A filter assembly for removing particles from air flow across the filter assembly with a frame around a perimeter of the filter assembly, dynamic filter media for removing particles from air flowing from an upstream side of the filter assembly to a downstream side of the filter assembly that passes from a clean filter media storage chamber to a used filter media collection chamber within the frame on a second side of the filter assembly. The dynamic filter media is moved from the output from a turbine shaft modified by a gearbox to drive a set of drive traction rollers.

Abstract: Described are multi-stage drum filtration systems including a primary rotary drum filter stage, at least one passive filter stage, and a main fan configured to create a vacuum on an inlet side of the primary rotary drum filter stage. The multi-stage drum filtration system may also include a HEPA filter stage. A controller may be configured to control a speed of the main fan to maintain an inlet vacuum to the primary rotary drum filter stage that corresponds to an inlet vacuum set point input.

Abstract: The invention is directed to a direct replacement air filtration or handler filter that is placed within an air flow channel within an air handler unit having a housing. A motor in communication with a controller and having an at least one sensor input or a timer or a transceiver and processing module. A filter media storage area is located on one end of the housing, with a pleated, folded filter media folded and compactly stored inside the filter media storage area. An exposed filter media containment area is located on an opposed end within the housing with the filter media extending therebetween. The filter media being paid out or advanced from the filter media storage area across the housing where it is exposed to air within the air flow channel as it removes contaminants from the air.

Abstract: The invention is directed to replacement media advancing air filter in air handling units with a flow channel. The filter having a housing and an exposure slot with filter media storage area that has an unexposed pleated, folded filter media portion stored therein. The filter media portion being folded and stacked in and compactly held at least in part within the storage area. A motor is coupled to a power supply and in communication with a controller. The motor moves a movement member that moves a portion of the filter media from a stored state in the storage area into the exposure slot and is exposed to the air in the air flow channel creating an exposed portion of the filter media. The exposed portion is collected within a containment area as a further portion of media is moved into the exposure slot to replace the exposed portion therein.

Abstract: A replacement filter deployed within a flow channel with a housing having a first frame member and a second frame member that are detachable with an exposure slot formed within the housing. A filter media storage area is within the housing, having unexposed, folded, pleated filter media stored therein. The unexposed folded, pleated filter media is compactly held within the filter media storage area. A motor is coupled to a power supply and in communication with a controller. The motor moving a movement member that advances an unexposed portion of the stacked pleated filter media into the exposure slot, expanding and exposing the unexposed portion of the media to the flow channel while retaining pleats and creating an exposed portion of the filter media. A containment area is provided where the exposed portion of the pleated filter media is collected folded, restacked and compactly stored and retained.

Abstract: Described are multi-stage drum filtration systems including a primary rotary drum filter stage, at least one passive filter stage, and a main fan configured to create a vacuum on an inlet side of the primary rotary drum filter stage. The multi-stage drum filtration system may also include a HEPA filter stage. A controller may be configured to control a speed of the main fan to maintain an inlet vacuum to the primary rotary drum filter stage that corresponds to an inlet vacuum set point input.

Abstract: The invention is directed to a direct replacement filter having a housing with an exposure slot with a filter media storage area having unexposed folded, pleated filter media stored therein, being unexposed pleated, folded, and stacked to be compactly held within storage area. An at least one motor is coupled to a power supply and in communication with a controller. An at least movement member is coupled to an at least one support member coupled to the media. A containment area also provided where the controller signals the motor engaging the movement member which is driven such that the movement member drives the at least one support member which engages the unexposed folded pleated filter material, moving the unexposed folded pleated filter media the storage area toward the containment area and moving an exposed portion of the filter media through the at least one exposure slot toward the containment area.

Abstract: A method for renewing a sheet-type filtering material to a flowing gas stream inside a conduit by converting some of the energy of a flowing gas stream traversing the filter assembly to rotate a propeller and the propeller shaft. The rotational energy from the propeller shaft is operably coupled to a gear that causes a supply of unused sheet-type filter material on a first side of the filter assembly top move across the filter assembly to a second side of the filter assembly, so that the portion of the sheet-type filtering material in a position to filter a flowing gas stream changes over time as the flowing gas stream rotates the propeller.

Abstract: The invention is directed to replacement media advancing air filter in air handling units with a flow channel. The filter having a housing and an exposure slot with filter media storage area that has an unexposed pleated, folded filter media portion stored therein. The filter media portion being folded and stacked in and compactly held at least in part within the storage area. A motor is coupled to a power supply and in communication with a controller. The motor moves a movement member that moves a portion of the filter media from a stored state in the storage area into the exposure slot and is exposed to the air in the air flow channel creating an exposed portion of the filter media. The exposed portion is collected within a containment area as a further portion of media is moved into the exposure slot to replace the exposed portion therein.

Abstract: The invention is directed to a direct replacement air handler filter placed within an air flow channel having a housing. The housing having a motor coupled to a power source. The motor being in communication with a controller having an at least one sensor input or a timer. With a filter media storage area located on one end of the housing, having a folded filter media compactly stored inside the filter media storage area, and an exposed filter media containment area located on an opposed end. The filter media extending there between. The filter media is paid out from the filter media storage area across the housing where it is exposed to air within an exposure area and removes contaminants from the air. It is further passed through a seal that seals the containment area where the filter media is re-folded, collected, and compactly stored with the filtered contaminants.

Abstract: The present invention includes: a rolled filter stretched between first and second winding shafts and, unused part of the filter being wound around the second winding shaft; a brush provided between the first and the second winding shafts so as to come into contact with a surface of the filter; a feeding mechanism for driving the first and the second winding shafts to take up or rewind the filter; and a feeding control unit for controlling the feeding mechanism. When activating a renewing operation for feeding unused part of the filter from the second winding shaft, the feeding control unit controls the feeding mechanism such that once the filter is taken up by the first winding shaft by an take-up amount La, the filter is rewound by the second winding shaft by a rewind amount Lb, and La and Lb satisfy a relationship La?Lb.

Abstract: A machine includes a heat exchanger for an engine having a heat exchanger core and a filtration system. The filtration system includes a flexible filter sheet coupled with at least one take-up roller and a filter cleaner adapted to clean the filter via compressed air. A method of operating a machine cooling system includes rotating a rotatable drive element coupled with a filter, and cleaning the filter by directing compressed air therethrough.

Abstract: A lint filter device for an airflow in a tumble dryer, comprising an endlessly circulating element, arranged around at least two deflector elements and positioned such as to be crossed by the airflow. The circulating element has an upper edge and a lower edge and first engaging elements are arranged on at least one of the two edges which, on opening a loading door of the tumble dryer may come to cooperate with at least one second engaging element, arranged inside the tumble dryer such that, on the opening process of the loading door, the circulating element may be automatically moved in a circulating direction and may be passed across at least one device for the removal of lint from the circulating element. The invention further relates to a method for cleaning such a lint filter device.

Abstract: An air filter arrangement for an agricultural combine located on a panel at a side wall of the agricultural combine. The air filter arrangement includes a rotary filter mounted for rotation at a first aperture, a scoop enclosing the rotary filter and blocking substantially all air flow to the rotary filter except at a scoop inlet disposed along an upper edge of the scoop above the rotary filter, and at least one stationary filter disposed to filter air passing through a second aperture in the panel, the stationary filter being located between an upper portion of the rotary filter and the scoop inlet.

Abstract: An inner portion of a filter cleaning portion 300 arranged at an inner portion of an interior unit is respectively arranged with cleaning units 300A, 300B constituted by arranging upper brushes 344a, 344b brought into contact with one face of an air filter and lower brushes 322a, 322b brought into contact with other face of the air filter 5 opposedly to each other at filter inlet/outlet 350a, 350b of the filter cleaning portion 300. Further, a longitudinal frame 54 and a transverse frame 55 of an air filter 5 having a filter sheet 51 in a shape of a meshed sheet for catching dust and a frame 52 for supporting the filter sheet 51 are formed on a rear face side (side of heat exchanger 3) of the filter sheet 51.

Abstract: An air filter for electric welding includes a box having an opening for connecting with a sucking tube, an dividing plate dividing the box into an upper chamber communicating with the opening and a lower chamber, a spark blocker inside the upper chamber, a movable filter device set under the spark blocker inside the upper chamber and provided with a cloth filter, a blower inside the lower chamber, and an extractable screening device installed outside it and communicating with the lower chamber. In using, when the blower is switched on, the air is sucked in from the sucking tube to the spark blocker, the movable filter device, the blower and the extractable screening device orderly, blocking sparks completely and achieving an effective filtration.

Abstract: An apparatus and corresponding method for automatically changing out a filter cartridge in a continuous air monitor. The apparatus includes: a first container sized to hold filter cartridge replacements; a second container sized to hold used filter cartridges; a transport insert connectively attached to the first and second containers; a shuttle block, sized to hold the filter cartridges that is located within the transport insert; a transport driver mechanism means used to supply a motive force to move the shuttle block within the transport insert; and, a control means for operating the transport driver mechanism.

Abstract: A filter screen assembly for use with an air intake structure, the structure including a face within which is formed an air intake opening. The filter screen assembly includes a screen having a flexible mesh material and an outer perimeter edge. The perimeter edge is secured at specified locations to the face of the air intake structure, by a plurality of fastener components each including a fixed portion and an actuating portion, in order to filter out contaminants associated with an air stream entering the intake structure and to prevent the screen from being drawn into the air intake opening. Alternatively, at least one elongated track may be secured to a face of the intake structure proximate the intake opening and, in use with a plurality of traversably secured trolley hooks, operates to advance the screen in a given fashion across the intake opening.

Abstract: A filter system includes a source of clean filter media adjacent a channel through which fluid passes. The filter media is automatically advanced from the source to the channel and eventually to a sealed container adjacent the channel. The filter media is automatically advanced through the channel, where it is replaced with clean filter media in the channel. A controller controls the advancement of the filter media based upon time or based upon a current condition of the filter media.

Abstract: Self cleaning air filtration machine and a method for using same comprising; a filter with a motor driven belt or disk or counter rotating disks that are perforated, a spray bar, a recirculation pump and supply line, a wet tank, a ultrasonic transducer, ultraviolet submersible bulbs, a water fill port, a liquid level sensor, a liquid and sediment drain port, and a power source. A preferred embodiment includes a subsonic transducer on the wet tank. A preferred embodiment includes a air diffuser, a toxic and noxious gas detection and recognition and radiation detection with automatic safety shut down and audible and visual alarm, a ultraviolet saturation chamber. A preferred embodiment includes a secondary wet filter, a secondary air diffuser, a secondary ultraviolet saturation chamber. A preferred embodiment includes a inline dryer assembly.

Abstract: The replacement of filters for Heating, Ventilating, and Air Conditioning (HVAC) is often time-consuming and labor-intensive. Organizations having responsibility for many apartment or dormitory units can spend a significant fraction of their man-hours replacing such filters. A novel approach to reducing the labor for this task is to attach one end of sheet-type filtering material to a dispensing roll, and the other end to a gathering roll; both rolls being affixed to a frame. The assembly is installed into an air duct and the filtering material allowed to blouse, somewhat. The flow of air is intermittent in typical HVAC systems, so when the air begins to flow, the filtering material is forced, due to its resistance to flow, in the direction of the flow. This energy—a force applied through a distance—is utilized by a lever arm bracket to advance the gathering roll. In this fashion, new material leaves the dispensing roll and is exposed to the air, while the dirty filter sheet accumulates on the gathering roll.

Abstract: A self-cleaning strainer which may be installed upstream of a heat exchanger to prevent debris greater than a critical size from reaching the heat exchanger. The strainer is preferably mounted just upstream of a heat exchanger in order to minimize the possibility of debris reaching the heat exchanger. The strainer comprises a screen element which can be advanced across the flow path of the fluid between two rollers. The screen element is placed so that the fluid must flow across the screen element face to continue through the process pipe; the screen may be perpendicular or parallel to the fluid flow axis of the strainer body or at an intermediate angle to it. Flow blocking members are used so as to direct the flow to pass through the screen element.

Abstract: A furnace filter system or kit for installation on an existing furnace duct having upper and lower supply roll supports respectively mountable on the top and bottom walls of the duct adjacent one side wall of the duct for removably receiving a supply roll of filter media therebetween, and upper and lower take-up roll supports respectively mounted on the top and bottom walls of the duct adjacent the other side thereof for removably receiving a filter media take-up roll therebetween. Slots are provided in the side walls of the duct inwardly adjacent the corresponding one of the supply roll and take-up roll and between the top and bottom walls of the duct, and a filter media supporting frame assembly is received in the duct and has opposite sides provided with guide slots therein aligned with the duct slots.

Abstract: A furnace filter assembly for removing dirt and contamination from air entering an existing furnace is installable on the existing furnace without the need for modification thereof, and includes a filter frame, a supply roll for supporting a continuous length of bulk filter media, a take-up roll for receiving the filter media as it is advanced from the supply roll across the filter frame, a motor for rotating the take-up roll for advancing the filter media, all of which components are mounted on the filter frame. The assembly further includes a motor control system having a pressure sensor, a timer, and a switch in electrical communication with a controller for energizing and de-enegizing the motor in response to conditions of the filter media.

Abstract: An automated filter changing device (20) includes a filter reel system (22). A motor (24) is connected to the filter reel system (22). An airflow sensor (26) is in an airflow of the filter reel system (22). A controller (28) is connected to the motor (24) and the airflow sensor (26). The airflow sensor (26) determines when the airflow is below an acceptable threshold. When the airflow is below an acceptable threshold, the controller (28) tells the motor (24) to index the filter reel system (22).

Abstract: A furnace filter system or kit for installation on an existing furnace duct having upper and lower supply roll supports respectively mountable on the top and bottom walls of the duct adjacent one side wall of the duct for removably receiving a supply roll of filter media therebetween, and upper and lower take-up roll supports respectively mounted on the top and bottom walls of the duct adjacent the other side thereof for removably receiving a filter media take-up roll therebetween. Slots are provided in the side walls of the duct inwardly adjacent the corresponding one of the supply roll and take-up roll and between the top and bottom walls of the duct, and a filter media supporting frame assembly is received in the duct and has opposite sides provided with guide slots therein aligned with the duct slots.

Abstract: A furnace filter system or kit for installation on an existing furnace duct includes upper and lower supply roll supports respectively mountable on the top and bottom walls of the duct adjacent one side wall of the duct for removably receiving a supply roll of filter media therebetween, and upper and lower take-up roll supports respectively mounted on the top and bottom walls of the duct adjacent the other side thereof for removably receiving a filter media take-up roll therebetween. Slots are provided in the side walls of the duct inwardly adjacent the corresponding one of the supply roll and take-up roll and between the top and bottom walls of the duct, and a filter media supporting frame assembly is received in the duct and has opposite sides provided with guide slots therein aligned with the duct slots.

Abstract: Constantly high efficiency of a catalytic converter can only be ensured when the configuration is maintained relatively free of particulate matter. A screen is disposed on the inflow side of the catalytic converter, which continuously or discontinuously transports away the flue dust particles collected by the screen. The flue dust collected is transported by the lateral movement of the screen to one side of the catalytic converter where the collected dust is removed. Alternatively or additionally, a vacuum system may be employed to clean the screen.

Abstract: A filter screen assembly for mounting over an air intake opening of a structure. The structure has a height, a width and a depth and defines a selected face within which the air intake opening is formed. The selected face further includes a top, a bottom, a first side and a second side surrounding the intake opening. A planar and flexible filtration screen defines a substantially rectangular shape with by a top edge, a bottom edge, a first side edge and a second side edge. Fasteners are provided for securing at least first and second sides of the screen to corresponding sides of the intake structure and include eyelets formed within the screen which are supported upon tubular portions extending from the structure and fasteners which secure within the tubular portions to affix the screen in place.

Abstract: A high efficiency air conditioning system is proposed, in which, while operating on a batch system, desiccant regeneration and process air dehumidification can be carried out simultaneously with a simple configuration. The air conditioning system comprises at least two desiccant members, a process air passage for providing a process air to one of the desiccant members for dehumidification of the process air, and a regeneration air passage for providing a regeneration air to the other of the desiccant members for regeneration of the regeneration air. The desiccant members are movable with respect to the process air passage and the regeneration air passage to alternatingly switch each of the desiccant members from one of the regeneration air passage and the process air passage to another.

Abstract: The dust-laden air is led along a flow path through a porous filter wall (7) into a vacuum atmosphere (4') and from there, as clean air, over an acceleration stage (24) and discharged from the flow path. In order to equalize the resistance to flow in the flow path, the filter wall (7) is periodically cleaned with force pulses. In this connection, it is acted on, in time sequence, only section-wise by force pulses, namely when the filter-wall sections are in a position directed transverse to the vertical during the action of the pulses or are then brought into such a position. In this position, the dust-laden atmosphere lies--seen in the direction of flow--below the filter-wall section (7) and the vacuum atmosphere (4') lies above it.

Abstract: A filtering assembly for protecting an air intake of a structure. A flexible screen is mounted so as to cover an air intake opening of the structure. The screen may be selectively moved in either of opposite directions so as to be raised or lowered across the intake opening. The screen may further be stored at either or both ends of the structure.

Abstract: The improved carpet cleaning machine, intended for use with "dry" carpet cleaning systems using dampened granules or particles, can be used in either of two modes. One involves carpet "brushing" for dirt removal by urging particles into the carpet and along the fibers. The other involves later vacuuming for particle removal. To facilitate the latter, one embodiment of the machine has first and second particle-removing media such as a concentrically-mounted cyclone separator and conical screen filter, respectively. The separator has air flowing through it downwardly along a vortical path and then upward, such air flow often carrying along a few particles. Such high-velocity particles impinge on the outer surface of the screen filter and many particles adhering to such filter are dislodged. The filter is said to thereby be "purged" or cleaned. There may also be a third medium and even a fourth medium to remove very fine particles before the air is expelled back into the room.

Abstract: An improved machine convertible for brush-aided cleaning or vacuuming includes a pair of powered brushes counter-revolving for stroking solvent-dampened carpet cleaning particles through the carpet and along carpet fibers during initial cleaning. A separately-powered pod is detachable from the machine during brush-aided carpet cleaning and attached to a machine-mounted vacuum nozzle for carpet vacuuming to pick up the dirt-laden particles. The pod has first and second media selected to remove particles of differing sizes from air flowing through the pod. During initial carpet cleaning when vacuum is not needed, the pod may be detached and used in another area for hand-vacuuming carpeted stairs and other "small-area" places.

Abstract: A filtering device for a tenter for the gaseous treatment of fabrics includes a movable filtering belt which traverses the entire length and cross section of the tenter. Pressure nozzles on the clean side of the belt dislodge collected materials into waste collectors which are in communication with discharge dusts traversed by the belt, the belt thus filters gases returned for internal circulation and gases emitted to the atmosphere.

Abstract: An air filter assembly and more specifically the use and combination of a relatively inexpensive and easily replaced paper filter associated with a conventional polyfoam or fiberglass filter conventionally employed in an intake of an air duct system associated with an air conditioning system or air heating system utilized in homes, offices and the like. Specifically, the air filter assembly includes a rolled filter paper that is drawn across the upstream side of a polyfoam filter or fiberglass filter which acts as a support for the filter paper with the paper filter being replaced periodically by moving a new segment of paper filter from the paper supply roll to a position in alignment with and in engagement with the polyfoam filter and disposing of the used paper filter. An inspection window is provided in the air intake louver door normally provided in air conditioning/heating systems to enable the condition of the paper filter to be observed to determine if the paper filter should be changed.

Abstract: An efficient, highly porous fabric filter medium capable of filtering air at temperatures up to about 500.degree. F. (260.degree. C.) has been provided. The filter medium is made from a polyimide fiber and is especially well suited for use in combination with a rotating drum filtering machine, thereby providing high temperature air filtration at a lower initial equipment and installation cost, and with subsequent lower operating and maintenance costs than have been previously possible.

Abstract: A filtering device for dust and exhaust gases of glass melting furnaces containing sulfurous compounds wherein the filtering medium is mineral wool which can be passed across the exhaust gas flow by means of a temperature-stable belt that matches the opening for the gas passage.

Abstract: A portable air cleaner consisting of an upright housing having casters on the bottom to enable it to be moved readily into different locations. The housing has a compartment for containing a roll of filter medium, preferably a filtration paper as disclosed in U.S. Pat. Nos. 4,239,516 and 4,293,378, which may be drawn from the roll compartment across the hollow frame.In use, a fresh section of the filter paper is positioned overlying the frame until it becomes loaded with particles filtered from the airstream flowing through the hollow frame. When the filter medium becomes loaded, a fresh section of the medium is drawn across the frame.An overload device is provided to interrupt energization of the motor driving the fan when the filter medium becomes sufficiently loaded to block flow of air through the filter medium.

Abstract: An electrostatic powder coating installation which includes a cabinet for accommodating a device for producing electrostatically charged powder, with a filter strip being disposed in the cabinet at a bottom end thereof. A suction system is provided which includes at least one movable suction nozzle and one suction air duct functionally connected with the suction nozzle with a suction blower. The suction nozzle is functionally connected with a drive belt, with the belt moving the nozzle transversely to the suction air duct. The suction nozzle is reciprocated by at least one motor driven belt, with the belt simultaneously serving as a sealing element for a slot provided along a length of the suction air duct.

Abstract: A locking structure of wire rod for filter element, which comprises perforating a locking hole larger than a sectional area of the wire rod near both ends or either one end portion of a cylinder with a passage leading in and out provided thereon, inserting an end portion of the wire rod in the locking hole, fixing mechanically the end portion of the wire rod by pushing forcedly in on a wedge. It is further intended that the wire rod is particularly formed triangularly in section, a threaded groove angled same as the top is formed to a desired slit on an outer peripheral surface of the cylinder, the surface on which the wire rod is wound is made even peripherally, thereby functioning effectively as surface filtration and surface separation.

Abstract: The disclosure describes a filter assembly for removing particulates from a fluid. The filter assembly comprises a porous pleated composite and structure for directing fluid flow through the composite. The composite includes upstream and downstream filter media, the upstream filter medium being removably mounted on the surface of the downstream filter medium.

Abstract: An apparatus for filtering a fluid medium has a sealed ring-shaped body in the interior of which is movably mounted a flexible filtering member having a toroidal shape. Slide valves divide the interior of the body into two portions, one of which receives the supply of fluid medium to be cleaned and removes the fluid medium cleaned by the filtering member, while the other cleans the filtering member by removing cake from it.

Abstract: A deodorizer is constructed of a casing defining an intake opening and a discharge opening, a blower provided in opposition to the intake opening, a filter provided in the flow passage of an air stream to be produced by the blower, and a reservoir for storing an odor-absorbing liquid therein. The blower, filter, and reservoir are all housed within the casing.

Abstract: Electrostatic powder coating apparatus having an outer filter belt from which excess powder is removed by an elongated pick-up tube which extends across the width of the belt. The ends of the filter belt, instead of being joined, are overlapped, such that the uppermost end of the belt faces the direction which is opposite to the travel direction of the belt, avoiding interference with the powder pick-up tube.