Abstract: Individual disposable nose and mouth filters, in combination, each of which is comprised of a sheet of a suitable air filtering material, sized and configurated respectively to loosely cover the mouth and nostril portions of the face of a wearer, continuous strips of a suitable pressure sensitive adhesive tape are engaged in a peripheral relation to outer peripheral edge areas of the respective filters and outer periphers of the adhesive tape, normally covered by removable backing strips, are extended beyond the filters for secure engagement with face areas surrounding the mouth and nostril areas of the wearer's face.

Abstract: A filter module has a housing providing a receptacle for a standard filter element, and also has a lateral extension for accommodating securing means to hold the filter element in place. The lateral extension defines a grille opening for removeably receiving an outlet grille in flush relationship, the grille opening extending laterally beyond the receptacle. A seal gasket closes the space between the grille and the filter element, embracing the securing means.

Abstract: If the edge of a filter cloth is coated with one or more layers of a polychloroprene latex mixture which contains zinc oxide and a silicate filler in addition to a polychloroprene with carboxyl groups, sticking is so greatly reduced that the durability of the filter cloths is substantially increased.

Abstract: Device for collecting air-borne dust samples on a membrane in an even distribution which enables X-ray diffraction analysis of the collected samples.

Abstract: A diffuser of the type used in supplying filtered air to a clean work area includes a filter housing within which is supported a filter panel. Gaskets are carried on the upper and lower peripheral surfaces of the panel and an adjustable, resilient clamp operably engages the filter and biases the filter and the upper gasket to form a knife edge seal with a portion of the filter housing. A protective grill assembly is sealingly latched to the housing and also forms a knife seal with the lower gasket on the filter panel. Further, a curtain support member is disclosed which is carried by the grill assembly and seals an isolation curtain airtight to the ceiling.

Abstract: A sheet of porous filter material folded into accordion pleats, the pleats having opposite edges folded over on diagonal fold lines to close the opposite edges of alternate pleats. The pleated and folded sheet is selectively disposed in flat panel form or formed into a tube with the pleats extending axially of the tube. When the filter is in its tubular form, the folded pleat ends are disposed at the exterior of the tube.

Abstract: The drawings illustrate an air filter assembly which is assembled from a pair of identical box-like housing halves. Equally spaced rib elements are formed in each half such that, upon assembly, the rib elements are interdigitated to provide a space for confining therebetween a pleated filtering sheet having a large filtering area.

Abstract: A filter assembly which includes spaced first stage resin bound fibrous filter members with a second stage fine filter member spaced between the first stage members to form plenum chambers on opposite sides of the second stage member with the first stage members being dimensionally stable and supporting and protecting the second stage filter member.

Abstract: An air filtering system includes a motor driven exhaust fan operable to draw air through a filter for particulate spray material, support means for supporting a dispenser adapted under operator control to dispense particulate spray material into the air and means responsive to operator removal and return of the dispenser to the support means for energizing and deenergizing the motor, respectively.

Abstract: The filtration module is adapted to be installed in groups occupying all or a substantial portion of a wall or ceiling area in a room. The filter elements are replaceable from inside the room without disassembly or removal of the housing structure. The filter elements are held in secure sealing relationship against recessed edge surfaces by an easily removed retaining frame normally secured to the housing with fastenings accessible from within the room.

Abstract: An air filter assembly is provided which comprises a multisided air filter panel and a multisided supporting frame therefor. The frame is of unitary construction and includes a foraminous center section, and a marginal section delimiting the center section. The center and marginal sections are in supporting engagement with one surface of the filter panel. The frame is provided with a plurality of peripheral sections which are foldably connected to the marginal section and cooperate with one another to delimit the center and marginal sections. Each peripheral section includes foldably connected first and second flange segments which are disposed in substantially face-to-face fold back relation. The first flange segment is foldably connected to a portion of the marginal section and extends angularly inwardly therefrom and forms an acute angle with the portion of the marginal section to which it is attached. A third segment is foldably connected to the second flange segment and extends angularly therefrom.

Abstract: A trap accessory, for selective coupling between a suction conduit and an aspirator includes: an elongated housing having a through passage; an elongated retainer slidably received in the housing passage, and having a through passage; and a filter element retained in the housing passage by said retainer. The housing is provided with a coupling nipple for coupling to a complementary coupling orifice in the suction conduit; and the retainer is provided with a coupling orifice for coupling to a complementary coupling nipple of the aspirator. The suction conduit and suction appliance have complementary coupling members, and are adapted to be coupled directly together in the absence of the trap accessory.

Abstract: An improved turbine inlet screen for protecting the inlet to the turbine of an engine turbosupercharger and exposed to numerous substantial and rapid variations in exhaust gas temperature. The screen comprises a circular metal plate having an improved pattern of annularly arranged perforations providing radially non-linear mass relations from the plate center to its edge selected to reduce maximum thermal stresses, particularly at the plate edge, during transient gas temperature conditions.This invention relates to engine exhaust turbine inlet screens for protecting the exhaust turbine from the entry of potentially damaging foreign matter and, more particularly, to a plate type inlet screen having an improved pattern of perforations arranged to minimize internal stresses in the screen plate which are caused by the varying exhaust gas temperatures of transient engine operation.U.S. Pat. No. 3,286,459 Ephraim, Jr., assigned to the assignee of the present invention, discloses in FIGS.

Abstract: A disposable filter unit which comprises a self-gasketing, self-supporting, bonded, glass-fiber filter tube sealed in a housing with two similar plastic molded end units, with one peripheral edge of the tube compressed against the interior face surface of one end unit, and the other peripheral edge against a solid surface disc element within the housing.

Abstract: A portable filter enclosure is connected to the exhaust outlet for a clothes dryer. The enclosure includes a multiple stage successive filter screen arrangement for removing entrained particles or lint from the air stream from the dryer. The enclosure is coupled through a flexible coupling to the exhaust outlet of the dryer to permit the exhausted heat to be directed at will to any part of the room or rooms near the dryer. Further included is a louvered arrangement in the outlet of the enclosure which permits further adjustment of the air stream. The outlet of the enclosure has a shape which is adapted to allow for connection of a hand-held drying tool or the like which may then be connected to utilize the output of the warm air from the dryer.

Abstract: An elongated, generally U-shaped in cross-section, retainer strip, of the type which includes longitudinally extending, resilient, confronting semi-walls extending inwardly and downwardly from the free ends of the legs to grip the edges of a fibrous filter mat, includes a pair of exterior flanges. One exterior flange extends in spaced, parallel relation to one of the walls of the retainer strip to mount the retainer strip on a planar portion of a filter frame without rivets or cement. The other exterior flange extends in spaced, parallel relation to another wall of the retainer strip to secure the edges of a conventional screen or mesh backing member eliminating sheet metal tabs.

Abstract: The improved dust bag is designed for use with an upright vacuum cleaner and is made of air impervious material. The lower end of the dust bag is connected with the base of the upright vacuum cleaner adjacent to the air discharge outlet of the vacuum cleaner. A first, relatively large opening is formed in the dust bag and defines the flow path through which air may flow out of the dust bag. An inner wall divides the interior of the dust bag into first and second compartments and includes a second opening which is aligned with and coincides, in size and shape, with the first opening and which permits air to flow from the second compartment to the first compartment. A filter is disposed in the first compartment adjacent to the first opening and is utilized to filter the air as it flows out of the dust bag through the first opening.

Abstract: A low-cost internal lint screen assembly is removably mounted on a rear bulkhead of an automatic clothes dryer in an aperture through which air and lint are exhausted from the rotating drum. A plurality of locking tabs with outwardly-extending shoulders about a peripheral rim of a cover of the assembly flexibly engage surfaces of the bulkhead. Two of the locking tabs are compound tabs also having inwardly-projecting barbs which capture a flexible rim of the frame of the lint filter, the filter frame being compressed inwardly to release the filter from the cover. Also, two of the non-compound tabs may be spring metal attached to the rim, or plastic and formed integrally with the rim material.

Abstract: A new filter structure is provided for removing particles from the exhaust gas of a large, single piston engine of low RPM, before passing the exhaust gas through a turbine for the purpose of driving a supercharger. The filter is so constructed as to be able to efficiently and reliably perform its filtering function over long periods of time in the high temperature environment of the piston engine exhaust. It comprises a cylindrical shaped housing having at one end longitudinally extending slits distributed around its circumference and at the other end an annular flange for mounting the filter in the exhaust line. The housing encloses a filter element comprising a hexagonal stacked array of cylindrical tubes and said filter element is retained in said housing by means of multiple resilient brackets, each formed in the shape of an open elongated loop so as to conform generally to the contour of the filter element on one hand and the inside of the housing on the other.

Abstract: A filtering attachment for the air intake of an automobile passenger compartment. A large rectangular sheet of laminated foil, vinyl and paper has a central opening over which is mounted a filter unit. The filter unit comprises two layers of non-woven paper heat sealed together to form a plurality of adjacent pockets, each of which contains pieces of activated charcoal. A fine mesh screen is mounted in overlying relationship to the filter unit. The attachment is mounted in overlying relationship to the air intake of the automobile so that all air entering the passenger compartment passes through the filter unit.

Abstract: An air filter panel comprising a filter element of fibrous material supported at its marginal edges by a stiff paper frame is provided. The strip of stiff paper is scored along two spaced longitudinal lines and folded away from the longitudinal lines to form a trough for receiving the filter element, the strip also being folded transversely to form a closed configuration surrounding the filter element to receive the marginal edges of the filter element in the trough. The frame is triangular in cross section with an outer wall, a flat rear wall extending inward from the outer wall toward the filter element, and an inclined front wall extending inward from the outer wall toward the filter element and sloping toward the rear wall. The front wall terminates in a flange disposed in a parallel relationship with the rear wall. The flange is secured to the rear wall with the filter element compressed therebetween to hold the frame and filter element together.

Abstract: A bacteria filter includes a pair of generally conical housing sections having confronting marginal flanges adapted to be welded together to seal the sections into an integral filter housing. The flanges have a pair of tongue-in-groove connectors to facilitate alignment of the sections during assembly and to automatically stretch a filter element between the two sections during assembly to optimize the filtering capacity of the filter. Each section of the filter device has a co-axial tubular neck extension defining an inlet and outlet of the filter device.