Abstract: The invention provides a filter assembly for use in a vacuum cleaner. The vacuum cleaner includes an airflow path (18), a dirt and dust collecting device arranged in the airflow path (18), a motor or fan unit (10) for causing air to flow along the airflow path (18). A first filter (12) is arranged immediately upstream of the motor or fan unit (10) and a second filter (14) is arranged downstream of the motor or fan unit (10), wherein the first and second filters (12, 14) are connected together so as to form the single filter assembly. The connection of the filters (12, 14) encourages the user of the vacuum cleaner to regularly maintain both filters (12, 14) thus improving the performance of the vacuum cleaner.

Abstract: An air filtering device including a circular plate, plurality of fan blades fixedly attached to the circular plate, the fan blades extending downwardly from the lower surface of the circular plate; a filter frame having an air permeable cylindrical inner wall, having an upper wall, having a lower wall, and having an air permeable cylindrical outer wall, the air permeable cylindrical inner wall, the air permeable cylindrical outer wall, the upper wall and the lower wall defining a cylindrical filter media containing space; air filtering media extending annularly around the air permeable cylindrical inner wall within the cylindrical filter media containing space; and, a filter frame attaching mechanism attaching the filter frame so that it extends annularly around the outer edges of the fan blades.

Abstract: Apparatus for closing the front of an air purifying unit that includes a main support frame upon which is secured a rear cover and a top cover. A removable front cover is arranged to pass over the front section of the support frame and closes against the top and rear cover. A latching device acts between the support frame and the top cover to secure the cover to the frame. Biasing members are mounted upon the support frame for urging the walls of the front and rear covers outwardly and guiding the covers into edge to edge alignment.

Abstract: The invention relates to an air purification apparatus substantially comprising a suction part, a ventilator housing with one or several ventilators and one or more air filters disposed before or after the ventilator, wherein a housing implemented with a base comprises modular function parts disposed tower-like one above the other, one engaging the other in sealing fit and readily detachable one from the other and at least one pivoted lever disposed pivotably on the lateral portion of the housing by means of a pivot receptor in the direction of the arrow and extending over all parts of the housing from the outside and clamping them together. The air purification apparatus additionally fastenable on the ceiling is usable in particular as spot suction, as ventilation or overpressure or as clean-air purification apparatus.

Abstract: A self contained air purification system includes an upright enclosed housing defining a germicidal chamber. A primary filter having a normally upstanding longitudinal axis has outer and inner peripheral surfaces, an interior plenum, and is supported on a base member. The housing has air inlets proximate the filter and air exhaust louvers in an upper member. Ultraviolet germicidal irradiation lamps are disposed in the germicidal chamber, and a resiliently mounted fan overlies the primary filter for drawing unclean air from the environment into and through the air inlets, through the primary filter, through the plenum and then into the germicidal chamber in a vortex-shaped whirling mass air stream flowing in a protracted course around and past the irradiation lamps for maximized exposure to the lamps, a purified air stream being discharged, after a final filtration, through the air exhaust louvers, then is returned to the environment.

Abstract: A high-efficiency air filtering apparatus for cleaning and circulating air in a closed room is in the shape of a vertical cylinder and includes a semi-cylindrical housing and a semi-cylindrical filtering chamber, both enclosing a centrifugal blower configured to suck filtered air out of the apparatus through the filter and to blow it into the room. The apparatus is characterized by that the filtering chamber contains a closely pleated filter sheet of HEPA-filter which is covered on top and bottom by flat panels and is air-tightly pressed onto the semi-cylindrical housing, thus making the apparatus completely air tight. The filtering chamber is urged onto the contour of the filtering chamber and is releasably fastened to the top and bottom of the housing, permitting replacement of the filter after clogging.

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

Abstract: An indoor unit of an air-conditioner having a unit body, provided on a rear of a ceiling, having an lower surface portion exposed indoor and an indoor heat exchanger and a blower in its exterior, a decorative panel, structured as the lower surface portion for the unit body, having an inlet port for guiding air in a room to the indoor heat exchanger, a filter fixing portion, structured as a part of the decorative panel, having a filter attached to a position opposite to the inlet port to be detachable, a support portion for supporting the filter fixing portion to be freely rotatable to the decorative panel, and an open/close driving mechanism for driving the filter fixing portion to be freely opened and closed against the decorative panel in a state that the support portion is used as a fulcrum, the mechanism for hanging the filter fixing portion from a ceiling surface when being opened to be moved.

Abstract: A filter ventilator built in a HF-tight manner into a slot of a mounting plate. An electroconductive housing and an electroconductive adhesive seals a transition between the housing and the mounting plate in an HF-tight manner to ensure HF-tightness.

Abstract: An air filter designed to be placed at a definite distance L beyond the periphery of the primary airflow which is created by an operating fan, and attached to a stationary element of the fan or to a stationary element of an enclosed space with fasteners which are, at the same time, vibration isolation units. The present invention greatly reduces the creation and release of fine particles of soot, mold, dust mites, etc. Five modifications of the invention are described, as well as the way to determine a distance L when the fasteners are used with ceiling fans, diffusors and other conventional fans. When an operating fan with a weighted base is used, the base acts as an additional vibration dampening unit, which further limits creation of fine toxic particles.

Abstract: An air purifier, an air filter and a method of manufacturing an air filter for an air purifier are provided. The air purifier includes a base assembly, a filter assembly and a grill. A fan is mounted to the base assembly, and draws air through the filter assembly. The base and filter assemblies include adjoining walls having openings which are substantially smaller in area than the areas of the adjoining walls and area through which air is drawn in through the filter assembly. A resilient gasket having a passage approximately the size of these openings is positioned between the adjoining walls. The filter assembly is drawn towards the base assembly when the fan is operated, thereby enhancing the seal formed by the gasket against the adjoining walls. Unfiltered air is accordingly unlikely to bypass the filter assembly. The air filter is manufactured in an efficient manner through the use of a back plate having oblique end portions.

Abstract: An air filtering, fume collecting mechanism is disclosed in which the contaminated air is drawn by a fan through a filter element which spins transversely across the flow of air being drawn by the fan. The filter element may be a disc removeably mounted on the hub of the fan blade assembly or it may be shaped to function as the impeller itself.

Abstract: A filter for suspensions with an impeller generating controlled turbulence for suspended solids, comprising an inclinable filter body 1 which shelters a filtrating element consisting of a filtrating sleeve (10) and an impeller (11) working together. The sleeve (10) is mounted on filter body (1) by means of supports (12) and it shelters a part of the impeller (11), comprising an axle (13) which is subject to a motor assembly (14), located outside body (1) and around which are mounted radial blades defining two phases: an inlet phase (15) and a processing phase (16), the latter being lodged inside the sleeve (10) and a washing device (31) for the sleeve (10). The inlet phase (15) comprises blades (20) in the form of a short pace propeller to give axial impulse, and no radial impulse, to the liquid to be filtrated. The processing phase (16) comprises blades in the form of a long pace propeller (21) to give impulse of great radial intensity, and small axial intensity, to the liquid.

Abstract: Energy conservation structure is provided for a controlled environment room having an opening in a wall thereof through which work is passed and through which room air under pressure may be discharged from the room, thereby to prevent contamination of the room air by contaminants in outside air entering the room through such opening, the energy conservation structure including structure providing suction adjacent to the wall opening to induce the flow of room discharge air thereto, the latter structure being constructed and arranged for communication with structure and apparatus for recycling the discharge air of such induced flow to the controlled environment room.

Abstract: A transport carrier for transporting x-ray masks, wafers and the like, from an ultra-clean environment to another through a lesser clean environment. The apparatus includes a box that is sealed from the outside by an access door, one or more fans, at least one air filter, rechargeable batteries or a continuous voltage supply for powering the fans. It also includes a damper mechanism for maintaining a positive air pressure when the access door opens. The damper also secures recirculating air inside the box when the door closes. The recirculating air is continuously cleaned at a rate of 2,000 times/minute. The air filter is placed horizontally, preferably, over a frame facing the product to be transported to ensure a continuous smooth, laminar flow.

Abstract: The invention provides a vacuum cleaner (100) including an airflow path, dirt and dust collecting device arranged in the airflow path, a motor or fan unit (110) for causing air to flow along the airflow path and also arranged therein, a first filter (112) arranged immediately upstream of the motor or fan unit (110) and a second filter (114) arranged downstream of the motor or fan unit (110), wherein the arrangement is such that, when in use the dirt and dust collecting device are made accessible or removed for emptying or replacement, both filters (112, 114) are visible to the user. This arrangement encourages the user of the vacuum cleaner to regularly maintain both filters (112, 114), thus improving the performance of the vacuum cleaner (100).

Abstract: A clean dry air generating unit that includes a fan filter unit and a dry air generating apparatus arranged within a chamber of closed construction. The fan filter unit includes an open air introducing fan, a chemical filter, and a HEPA filter. The chamber of closed construction is supplied air through the fan filter unit which is then supplied to the dry air generating apparatus. Clean dry air is fed from the generating unit to an area outside of the chamber or can be reintroduced to the generating unit. The apparatus can continuously supply clean dry air at a lower cost.

Abstract: An air filtration and purification system for the interior of a closed vehicle, including an outside air intake and an inside air intake, both the intakes empty into a common plenum located interior of the vehicle, an air passageway defined by an inlet, in fluid communication with the plenum, and an outlet spaced-apart therefrom for removing the air in the plenum, a plurality of purifying air filters arranged in series in the passageway, a first air movement device interposed the plenum and said passageway inlet to create a flow of air from the plenum to the filters, a second air movement device in the outlet of the passageway to draw said flow of air across the filters, and a vent device in fluid communication with the second air movement device for distributing the filtered air from the second air movement device into the vehicle.

Abstract: A ceiling fan for cleaning air in a room wherein each blade of the ceiling fan has a cavity open to the top and bottom surfaces of each fan blade and a filter unit in each of the cavities but within the confines of the fan blade such that, when the ceiling fan is operated, the airflow created by the ceiling fan will be forced through the filter unit from the bottom surface through to the top surface, wherein the filter units can collect airborne particles.

Abstract: A ceiling-fan-blade-mounted air freshener apparatus includes a housing assembly which includes a lower housing portion and an upper housing portion projecting upward from the lower housing portion. The upper housing portion includes a plurality of vent apertures. An air freshener/matrix assembly is housed within the housing assembly. A housing-to-blade connector connects the housing assembly to a ceiling fan blade. In one embodiment, the housing-to-blade connector is comprised of a layer of pressure-sensitive adhesive bonded to a bottom side of the lower housing portion. The housing-to-blade connector further includes a peel strip removably adhered to a bottom surface of the layer of pressure-sensitive adhesive. The housing assembly includes a pointed end, and the air freshener/matrix assembly includes a complementary pointed end. The pointed end of the air freshener/matrix assembly is wedged into the pointed end of the housing assembly under an influence of centrifugal force.

Abstract: Apparatus for indicating when the air intake filter of portable turbines useful with spray paint guns is blocked and a method and apparatus for close coupled mounting of a pair of series connected turbines by axially aligning and abutting the axial outlet of one turbine against the axial inlet of the other turbine with a seal surrounding the turbine junction and with tie rods extending between radially projecting apertured ears of the turbines securing the turbines together and supporting the turbines on a generally U-shaped mounting bracket having spaced apart flanges engaging the tie rods. An air baffle partitions the space containing the two turbines into two air plenums to prevent hot air exhausted by the larger turbine from entering the air inlet to the turbine impellers. A visual or audible indicator provides a perceptible indication that the filter is becoming blocked.

Abstract: A system and method for recovering vapors in industrial washing equipment, wherein a solvent is used to wash various articles within a wash area of the equipment. The system includes a hood supported above the wash area, a motor driven fan mounted within the hood for creating an envelope of negative pressure between the wash area and the hood to draw rising vapors into the hood and to direct the vapors at high velocity against a surface to cause separation of pure solvent liquid droplets from the vapor through impaction, and a coalescer for gathering the separated droplets of pure solvent prior to directing the pure solvent to a holding tank for reuse in washing operations.

Abstract: A high-efficiency air filtering apparatus for cleaning and circulating air in a closed room is in the shape of a vertical cylinder and includes a semi-cylindrical housing and a semi-cylindrical filtering chamber, both enclosing a centrifugal blower configured to suck filtered air out of the apparatus through the filter and to blow it into the room. The apparatus is characterized by that the filtering chamber contains a closely pleated filter sheet of HEPA-filter which is covered on top and bottom by flat panels and is air-tightly pressed onto the semi-cylindrical housing, thus making the apparatus completely air tight. The filtering chamber is urged onto the contour of the filtering chamber and is releasably fastened to the top and bottom of the housing, permitting replacement of the filter after clogging.

Abstract: A movable overhead ventilation assembly is provided for use in a work facility to be positioned in close proximity to a source of airborne environmental material. The ventilation assembly includes a supporting frame located within the work facility. The frame includes a longitudinally-disposed overhead track. A movable chassis is carried by the track. A ventilation housing is carried by the chassis for overhead translational movement of the ventilation housing within the work facility. The ventilation housing includes a plurality of walls, and has at least two openings therein defining respective inlet and outlet zones thereof. An exhaust fan is located within the ventilation housing between the inlet zone and the outlet zone for creating an upwardly moving air stream in the area surrounding the source of airborne environmental material.

Abstract: A smoke removal device, especially designed for use in welding, having one or more portable funnels, with a wide opening through which suction may be directed to remove smoke from particular areas where combustion is taking place, and a narrow opening opposite to the wide opening, a vacuum device for creating the suction by which the smoke is removed, the vacuum device having an inlet valve for each funnel, and hoses connecting the narrow opening of each portable funnel to one of the inlet valves of the vacuum device. In a preferred embodiment, the portable funnel is connected to a base containing magnets. The funnel is connected to the base by a first cylinder extending downward from the funnel, with the first cylinder fitting inside a second cylinder attached to the base, with the funnel and first cylinder being rotatable in relation to the base and the second cylinder. A wheeled, multifilter carriage is provided to clean smoke coming from the funnel before it is exhausted into the surrounding air.

Abstract: A window fan incorporating a filter. The fan has a low, flat profile for fitting in a window while occupying limited viewing area of the window. The fan includes laterally projecting extensions for sealing a gap which might otherwise exist at the right and left sides of the fan. The fan includes a motorized squirrel cage blower for forcing air through a flow path defined within the window fan. The blower is elongated, and oriented with its rotational axis arranged horizontally to enable the low profile. The filter is washable, and is installed by sliding into a holding chamber, and located serially within the air flow path. The window fan has a manually adjustable air deflector for directing discharged air as desired. The electrical circuit conducting power to the motor includes a touch sensitive switch for on-off control, a thermostatic switch for operating the fan when the touch switch is on and a predetermined temperature is detected, a speed selector switch, and an indicating lamp.

Abstract: A portable air cleaner designed to remove fine particles and unwanted gases from a room to provide for a healthier and cleaner environment. The portable air cleaner includes a high air volume circulating design and operates quietly and efficiently. The portable air cleaner is designed to minimize the unsettling of particles which have settled out on the floor about the base of the air cleaner so as not to aggravate the particle concentration within the room environment. The portable air cleaner includes a particle filter designed to have ultra high efficiencies with respect to particle removal. Disposed coterminous to the particle filter to remove unwanted gases from the filter air to provide for improved cleaner and healthier environment.

Abstract: An air cleaner assembly for ionizing and filtering air is supported by an electrical receptacle mounted in a wall. A housing supports an enclosed filter and a fan forces air into the housing, wherein the air is filtered and ionized. The filtered and ionized air is forced out of the housing through a grill mounted within the housing. A plug connected to the housing is mateable with the wall mounted electrical receptacle to provide power to the fan and to force air into the housing, through the filter, past the ionizer and out through the outlet grill.

Abstract: A smoke processor including a housing having a recess, an exhaust fan arranged with the housing, a filter mounted within the housing and located above the exhaust fan, a smoke processing container fitted in the recess of the housing, a flexible pipe connecting the smoke processing container with the filter, a cigarette lighter mounted in the smoke processing container, a linking rod having an upper end pivotally connected with the smoke processing container, a rotating disc rotatably connected with a lower end of the linking rod, and a fixed disc engaged with the rotating disc and mounted within the housing, whereby the smoke exhaled by the smoker can be effectively purified thus preventing air pollution,

Abstract: A micro-rotary screener for removing airborne materials from an airstream includes a shell for defining a generally drum-shaped shell, the shell including a first passageway for receiving the airstream and a second passageway for discharging cleaned air. A multi-blade rotating air lock within the shell includes an odd number of rotor lock blades for defining an odd number of pockets into which the airstream is directed. A drive is provided for causing the multi-blade rotating lock to rotate. Seals are attached to the rotor lock blades for contacting inner portions of the shell and restricting airflow between the plurality of pockets. Screens are attached to the edges of the rotor lock blades, and rotate therewith, for filtering airborne materials and for releasing filtered materials during rotation of the multi-blade rotating air lock. A material-discharge bin is provided for receiving filtered materials after they have been released from the screens.

Abstract: A fan blade cover slip is removably secured to each blade of a ceiling fan with fabric extending over the lower face of each blade to substantially cover the lower face of each blade. Each cover slip includes an elongated fabric sheet having longitudinal edges folded over the upper face of a blade to form longitudinal flaps, and with an outward end folded over the upper surface of the fan blade to form an outward end flap. A cord is journaled through a sleeve formed along the longitudinal edges and the outward end of the fabric sheet, with ends projecting out inward ends of the longitudinal sleeves. The projecting ends of the cord are pulled tight and then fastened together to secure the cover slip to the fan blade. An opening is formed generally midway along each longitudinal sleeve, with the cord crossing over from an inward sleeve on one side to the outward sleeve on the opposing longitudinal edge at the openings, to further secure the cover slip on the fan blade.

Abstract: An air conditioning unit is provided with a high capacity filtration system for removing pollutants from supply air, typically return air which has been recirculated from the conditioned area. A filter bypass passage and suitable flow control devices are provided so that supply air, typically fresh outdoor air, may be routed around the filtration system when minimal or no filtration is required. An air quality detector samples the air quality and positions the flow control devices to effect the most cost efficient operation of the air handling unit under the given operating conditions.

Abstract: A hand-held deodorizer which includes a cylindrical housing having a centrally mounted fan, and upper and lower air permeable barriers. At least one of the air permeable barriers includes a filter which absorbs odors from air drawn therethrough. The deodorizer further includes a U-shaped handle attached to the periphery of the housing disguising the deodorizer so it resembles a drinking mug. The handle contains batteries and a push-button switch permitting the user to selectively provide power to rotate the fan. The deodorizer can easily be transported and manipulated by the handle and placed adjacent a source of wretched odor. Upon actuation of the push-button switch, the fan draws air from the source of odor through the filter or filters where the wretched odor is reduced or eliminated, and dissipates the odor-reduced air into the surrounding environment. A flagrance impregnated member masks the scent of the dissipated air by providing it with a pleasant odor.

Abstract: An air cleaner apparatus for an internal combustion engine having a filter element with a generally planar face disposed in a direction parallel to the flow of air, the apparatus includes a central portion and an air guide disposed adjacent the central portion. The central portion communicates with the air guide through the filter element. The central portion has at least one air inlet in operative communication with the engine for permitting the flow of air from the air guide through the filter element and into the engine. The air guide includes an air scoop and an air exhaust, each disposed in a plane generally perpendicular to the direction of the flow of air relative to the housing. The air scoop and the air exhaust are disposed at opposite ends of the filter element such that a portion of the flow of air entering the air guide through the air scoop enters the central portion through the face of the filter element. The remainder of the flow of air exits the air guide through the air exhaust.

Abstract: A filter screen assembly for use with an air intake unit, the air intake unit having a top, a bottom and at least one side wall. A flexible screen is provided as a roll wound onto a spindle. The spindle is held within a vertically extending container secured to the side of the unit. The container has a bottom and side walls which define an open interior for receiving the spindle and the spindle is rotatably supported at opposite ends within the container. The flexible screen is unwound from the spindle and is attached to the sides of the unit at predetermined locations around the periphery of the unit. The spindle may further be dismounted from the container and the flexible screen manually rewound onto the spindle.

Abstract: A filter element is placed in front of the air intake opening of an electronics cabinet such that all air drawn into the enclosure of the cabinet passes through the filter element. A fan is mounted such that all intake air is drawn only through the air intake opening and the filter. The filter element is removable from the enclosure for easy cleaning.

Abstract: A high-efficiency air filtering apparatus for cleaning and circulating air in a closed room is in the shape of a vertical cylinder and includes a semi-cylindrical housing and a semi-cylindrical filtering chamber, both enclosing a centrifugal blower configured to suck filtered air out of the apparatus through the filter and to blow it into the room. The apparatus is characterized by that the filtering chamber contains a closely pleated filter sheet of HEPA-filter which is covered on top and bottom by flat panels and is air-tightly pressed onto the semi-cylindrical housing, thus making the apparatus completely air tight. The filtering chamber is urged onto the contour of the filtering chamber and is releasably fastened to the top and bottom of the housing, permitting replacement of the filter after clogging.

Abstract: A method of converting a dehumidifier (10) having a base portion (16), a center portion (18), an upper portion (20), a desiccant container (62), and receptacle container (36), to an air purifier (12). The method includes removal of the desiccant container (62) and replacing it with an air filter cartridge (94). The invention is also directed to the air purifier (12) and air filter cartridge (94) for converting from a dehumidifier (10) via the air filter cartridge (94).

Abstract: Air purification or filtration unit having a triangular housing, with the open front face being the hypotenuse of the triangle. The unit is particularly adaptable for use with conventional sized high efficiency particulate air, or HEPA filters and low penetration air, or ULPA filters, to create a highly filtered clean air environment. The unit includes a circulating fan within the housing to draw air through the filters and housing and to exhaust the air through the top housing wall for recirculation, and can also be ducted to exhaust filtered air from the environment, either in whole or in part. A germicidal ultra violet light may be placed within the housing for additional air purification.

Abstract: A compact and lightweight filter assembly for mounting on electronic equipment enclosures which provides EMI shielding and passage of air to the enclosure.

Abstract: A lighting fixture includes a lamp shade having a lamp holder to hold a lamp bulb on the inside and a plurality of hooks around the lamp holder, an air filter fastened to the hooks around the lamp holder, an electrical fan mounted on the lamp shade at the top and controlled to cause currents of air blowing through vent holes on the top of the lamp shade or to draw currents of air out of the lamp shade, and a covered on the electrical fan at the top and having a wire hole for passing electrical wires.

Abstract: A biological air filter for cleaning, humidifying, and detoxifying air containing harmful substances, having a generally cylindrical filter housing with a sealing cover and a removable filter element. The filter element contains a substrate and plants. Air is circulated through the moist substrate and released into the room. Dust and harmful substances are trapped in the substrate and are at least partially consumed by the plants. The biological air filter can also be connected to an existing ventilating system. It is decorative and suitable for use in offices, apartments, laboratories, doctor offices, and the like.

Abstract: An improved fume exhauster includes a housing forming therein a receiving space in which a suction and filtration unit is disposed. Fastened to the lower portion of the receiving space of the housing is a bottom plate having a fume sucking hole and a plurality of air exit holes arranged at a predetermined interval along left, right and front edges thereof. The fume is sucked in through the fume sucking hole of the bottom plate and is subsequently filtered by a filtration member. The filtered fume (clean air) is caused to pass through the air exit holes to form an air curtain under the fume exhauster. The air curtain acts to prevent the dissipation of the fume so as to reinforce the sucking and exhausting effect of the fume exhauster.

Abstract: A cleaning device for a clean room has at least two filter-fan units each comprising a filter and a fan. Connecting elements connect the filter-fan units to one another to form a self-supporting construction unit. Each filter-fan unit comprises a housing having profiled elements for engaging the connecting elements in the form of bars or angled pieces. The connecting elements can be T-shaped or cross-shaped. The construction units can be supported on supports on the floor or suspended from the ceiling.

Abstract: A ceiling mounted air purifier that provides a high velocity, multi-directional air exhaust pattern that distributes filtered air to all areas of a room which includes a plurality of filters and centrifugal fans. The centrifugal fans are substantially surrounded by baffles which form generally equally spaced exhaust outlets.

Abstract: An air filtering apparatus includes a fan body having an air intake and an air outlet. There is a fan within the body which draws air into the intake and forces it out of the outlet. There is at least one air filter between the intake and the outlet. A plenum chamber is connected to the fan body about the air outlet. The plenum chamber is a flexible bag of a sheet-like material which is inflated by air forced out of the outlet of the fan body. At least a portion of the plenum chamber is an air diffuser for air exiting the apparatus. The diffuser is more permeable than the filter.

Abstract: An apparatus for roasting coffee beans or the like includes a controlled spinning bed or fluid bed roaster in combination with a cyclone separator for removing chaff from the heating medium. The cyclone separator is disposed above and in coaxial and abutting relationship with the roaster. The separator has a generally cylindrical shape with a plate having a plurality of louvers in the base thereof. The louvers impart rotational movement as the heating medium passes therethrough so that the chaff can be removed therefrom. In a preferred embodiment of the invention, a second centrifugal separator which is relatively small with respect to the first separator is disposed adjacent the first separator for making a final separation and returning the heated medium to the roaster.

Abstract: An air handling and filtering system is provided for with conventional textile machines. The apparatus includes a common vacuum system for drawing first and second independent airstreams through the textile machines. A filtering system operates with the vacuum system to filter the useful white waste fiber material from all of the first airstreams. Individual filtering devices are provided for each textile machine and are housed in end-housing units disposed as one end of the textile machine. The individual filtering devices filter generally waste fiber material from the second airstreams drawn through the textile machines. The individual filtering devices can be isolated from the common vacuum system so that the individual waste fiber filters can be cleaned without stopping or otherwise affecting the critical first airstream so as not to detrimentally affect yarn formation at the spinning stations of the textile machines.

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: A generally flat air filtering device for an optical disk drive is disclosed. As air is sucked into the disk drive via an inlet of a filter, a filter mat included in the filter removes dust and other impurities from the air. The purified air comes out of the outlet of a tube and then enters and cools an optical disk unit. The filter mat has a generally V-shaped section and, therefore, has a filtering area great enough to enhance efficient dust collection as well as the service life of the filter. To isolate the purified air from surrounding dust-containing air, an endless projection or rail is provided on the tube to bite into the filter mat which is flexible.