Abstract: A vented hatch cover for an enclosed vessel having a cover body sized to overlie and cover a hatch opening defined by an upstanding coaming. A pair of air passages are defined by the cover body and a pair of hoods connected thereto. The hoods define air inlet opening and a plenum which communicates with air outlet openings in the interior of the cover body. The air passages permit air flow in sufficient volume to vent the vessel and to empty the vessel by high speed vacuum unloading. A filter is removably retained on the hoods in the air inlet openings. A filter screen on the interior of the cover prevents contamination of the air passages from the inside. A latching arm provides downward pressure on the hatch when in a sealing position and the capability of pivoting the hatch cover together with the latching arm when it is moved. The cover is floatingly engaged in the arm.

Abstract: A construction for supporting a flexible sheet is disclosed which includes a U-shaped channel having opposing flanges that are adapted to receive a complimentary spline member for frictionally engaging a flexible sheet, such as window screen, between a surface of the spline member and an adjacent inner surface of one flange of the U-shaped channel. The structure has several practical applications including the construction of window screens, electrostatic air filters of the charged media type, storm windows of plastic film and the like. An improved construction for an electrostatic air filter of the charged media type is also disclosed.

Abstract: A process for producing hermetically sealed filters is disclosed. The process includes the steps of providing thermoplastic base and top filter parts and a section of filtration media, sandwiching the media between sections of the base and top filter parts under a compressive force, applying a rapidly repetitive force to at least one of the filter parts to cause movement between the parts and frictional welding of the parts, maintaining the compressive force after frictional welding to allow the melted portion of the parts to solidify and thereby form a fluid seal at the junction of the filter parts and at the junctions of the filtration media and each of the base and top filter parts. In one embodiment, the junction between the filter parts is the periphery of an automatic transmission filter, and the junction is hermetically sealed. A hermetically sealed automatic transmission filter is also disclosed.

Abstract: For use in internally supporting a filter element of the fabric, bag-shape type there is provided a support frame having a border at least a part of which is defined by a single guide strip typically substantially W-shaped in cross-section and which presents two guide channels to face inwards of the frame for the spaced apart support of two mesh layers. A single deformed length of the guide strip may be used to form a base and two side portions of a rectangular shaped support frame.

Abstract: A high efficiency filter and method for its production. An array of tube-type sleeves, each sleeve composed of a filtering medium and joined longitudinally along its exterior surface to the adjacent sleeve, is expandably fixed into a framework and all margins of the array are sealed to the framework in order that a fluid passing orthogonally through the plane of the array and its frame must pass through at least two filtering surfaces. The process and machine used to make the aforementioned product start with a relatively narrow roll of filtration media and, through a series of steps, form, cut and glue the media so as to form the requisite sleeve structure and then by means of controlled curing, affix a predetermined number of the sleeves in to the desired array.

Abstract: A two step process for ultrasonically welding together first and second thermoplastic pieces and welding a membrane between these two pieces. The first piece comprises an annular bead, the second piece comprises an annular energy director. The method comprises first ultrasonically cutting and sealing the membrane to the first piece using an anvil comprising an annular projection and at the same time creating a groove in the first piece. The annular bead is ultrasonically melted and thus welds the membrane to the first piece. The first and second pieces are then brought together so that the groove and energy director are aligned. Under ultrasonic action, the energy director melts within the groove creating a strong weldment without any voids or material flashing.

Abstract: The present invention relates to a filter unit having a sheet of filtering material mounted on a first frame and a second frame received within and below the first frame. The second frame is configured such that the filtering material is tightly held between the first and second frames and the filtering material is stretched by the second frame. In accordance with one of the aspects of the present invention, the second frame is provided with ear members. The ear members are sized such that the ears penetrate the filtering material and hold the first frame tightly between the ear members. The ear members reinforce the first frame by the second frame, through a mechanical interconnection of the frames and also, prevent slippage of the filtering material.

Abstract: A filter or filter assembly in which at least the frame work is made of magnetic material which holds the filter or filter assembly in place without the need of hardware and which is easily removed for cleaning or changing. The applications or numerous such as vehicle vents, swimming pools, spas, radiator covers, or any opening which needs to be filtered which has a metal frame work or opening.

Abstract: A forced air handling system filter is provided including an inwardly opening, channel-shaped peripheral frame from which corresponding peripheral portions of a panel-like filter batt is supported and an elongated bar of scented material is provided and stationarily supported within a pocket of the frame opening inwardly of the inner periphery thereof. The bar includes a scent impervious cover completely enclosing the bar and one longitudinal edge of the bar projects outwardly of the aforementioned pocket toward the remote side of the frame and that portion of the cover disposed over the bar marginal portion includes a tear strip extending longitudinally thereof. The tear strip is adjustably tearable from the remainder of the cover to expose a corresponding portion of the bar for scent release therefrom.

Abstract: A filter element comprises at least two pleated filtering mediums and at least one roughly flat filtering medium interposed between the pleated filtering mediums. Each pleated filtering medium has an end constituted by edges of triangular bottom sections and the other end constituted by edges of triangular top sections. The triangular bottom sections of one pleated filtering medium is bonded to the flat filtering medium only at and near the edges of the bottom sections. The triangular top sections of the other pleated filtering medium is bonded to the roughly flat filtering medium only at and near the edges of the top sections. Spacers are provided between the top sections and the flat filtering medium and between the bottom sections and the roughly flat filtering medium. Such spacers may be constituted by alternate small ridges and grooves formed in the roughly flat filtering medium.

Abstract: A clamping arrangement for stainless steel fiber filter elements in the pressure relief channel of a safety containment of a nuclear installation. The filter elements are engaged at their edges by a clamping structure which is fully disposed within the duct walls defining the relief channel. The clamping arrangement includes a support frame mounted on the duct walls and a clamping frame disposed on the support frame and clamped thereto with the edges of the respective filter element clamped therebetween such that any leakage through the clamping arrangement is still contained by the duct walls.

Abstract: A device for filtering air in a room equipped with a ceiling fan having rotating blades includes at least one element made of a filtering material which is interconnected between two adjacent blades of the fan by a fastening means.

Abstract: A fluidation kit for retrofit installation on a pneumatic outlet for a railway covered hopper car is disclosed. The outlet includes an outlet pan having downwardly sloping walls. The kit includes at least one air permeable fluidizing membrane on the inside face of the outlet pan wall to fluidize a powdered or pulverant lading. An externally mounted manifold assembly is attached to outside surfaces of the outlet pan for connecting the air permeable fluidizing membranes on the inside surfaces of the downwardly sloping walls of the outlet pan to a source of fluidizing air. The air permeable fluidizing membrane is supported in a peripheral extending frame member which supports the air permeable fluidizing membranes a small predetermined distance above the sloping wall surfaces to provide a plenum therebetween for diffusing fluidizing air throughout the entire extent of the air permeable fluidizing membrane.

Abstract: A filter cartridge for removing particles of the order of submicrons from a solution, comprising at least two filtering films laid in parallel with the inner peripheral portions bonded fixedly to an inner rim of the core and with the outer peripheral portions joined together, thus defining a path of a solution to be filtered, and providing a relatively large effective filtering area.

Abstract: A pressurized gas discharge system for the safety containment of a nuclear reactor includes a conduit structure connected to the containment and consisting of a plurality of modular conduit units which are flanged together end-to-end, each having flanged side openings with filter frame members including stainless steel fiber filter packs flanged thereto in end-to-end relationship. The filter packs extend fully across the frame members and have their circumferential edges clamped between the flanges of adjacent frame members so that in the clamped areas the filter packs are reduced in thickness to a fraction of their original thickness, the flanges having U-shaped members disposed on their faces such that the legs of the U-shaped member project toward the adjacent flange and provide two seal strips with the edges of the filter packs compressed therebetween.

Abstract: An air cleaner and method of making same, the air cleaner comprises: a one piece, moulded housing, including domed first and second outer portions integrally formed about a common circumferential first edge, defining therein a chamber, an inlet and an outlet extending therefrom in communication with the chamber. A panel filter is secured within the housing, during the moulding thereof, at the common edge for dividing the chamber into first and second aerodynamically shaped compartments in communication with the inlet and outlet respectively.

Abstract: A protector screen assembly is disclosed to protect the turbine inlet of a turbocharger installed on an internal combustion engine. The protector screen prevents debris from entering the turbocharger in case of engine failure such as a broken valve. The protector screen is heat resistant and easily installed between the exhaust manifold and turbocharger turbine inlet.

Abstract: An exhaust gas purifier of the type wherein a catalytic body is elastically supported within a metal casing. This is achieved by at least partly filling a space between the catalytic body and the metal casing with a dampening member comprising one or more wire blocks. The wire is preformed of a screw shape and that preformed wire is wound into the shape of the block. This block is stretched to elastically fit over the body, and the block is compressed between the body and the casing.

Abstract: A dust collector of a large capacity suitable for cleaning air or gases and for separating out by-products of an industrial process for further utilization. The collector generally comprises a continuous and integral filter medium which is suspended form a plurality of downwardly extending frames forming a series of separate elements having a triangular cross-section, each element being relatively wide at the top and narrow at the bottom to define, between adjacent elements, a divergent collecting space which is wide at the bottom.

Abstract: An air filter for attaching to a top and/or bottom surface of a fan blade. The air filter is constructed from an elongated strip of porous material capable of having air pass therethrough while trapping airborne particles borne by the air. Also, the elongated strip has opposed exposed surfaces and a peripheral edge extending therearound and preferably, an adhesive strip having opposite surfaces and an adhesive substance on each of the opposite surfaces is attached to one side edge of the elongated strip. The other opposed surface of the adhesive strip is preferably attached to a top and/or bottom surface of a fan blade. Thus, the filter strip sweeps and filters air moving across the one surface of the fan blade as the fan blade rotates.

Abstract: A room air treatment system in which air is drawn through a large particle prefilter, a first carbon filter, a second dual honeycomb matrix carbon filter in which the honeycomb cells in adjacent matrices are offset relative to one another, a blower mounted on vibration isolation mounts and is expelled by the blower into a plenum from when it exits upwardly through a fine particle HEPA filter and finally out through a final filter which is a combination fine particle filter and carbon filter. A filter change warning system is provided which includes a 3500 hour filter change indicator, an every 7000 hour filter change indictor, a back-up warning indicator, a mute button for muting the warning indicator and a recycle system for restarting the hour count.

Abstract: A multiple stage filter assembly which combines a permanently framed particulate filter media layer with an odor and particulate removal filter media layer which is removably mounted to the particulate permanent filter frame in overlying relationship to the outer surface of the particulate layer. The odor removal filter media layer is held in position by a plurality of filter retaining members which cooperate with the main frame structure to provide support for the gaseous filter layer. The retaining members function in a manner which permits simple removal and replacement of the gaseous filter layer without disturbing the permanently framed particulate filter layer.

Abstract: An ostomy bag has a filter attached to it by a series of plural sequentially peelable adhesive annuli.

Abstract: An air cleaner assembly includes a pair of molded housing members, each of which include four side walls and an open end. The opposite end of one of the members carries an outlet tube for connection to the air intake system of the vehicle, and the opposite end of the other member includes a lattice-work structure defining openings to admit air into the air cleaner assembly. The two housings snap together by receiving the side walls of the one member into the open end of the other member, and the members defining the lattice-work structure engage a panel cartridge filter assembly to force the latter into an adhesive carried in a groove extending around a flange defined on the one member.

Abstract: A composite stove hood filter consists of a primary metal mesh filter and a nonwoven, secondary disposable filter. The secondary filter is a low basis weight (0.2 oz./yd..sup.2 to 1.0 oz./yd..sup.2) spun-bonded polymer sheet which is attached to the primary filter by means of elastic bands or Velcro strips. A patch of melt-blown polymer material, impregnated with air freshener, may be attached to the spun-bonded sheet of the secondary filter to freshen the air as it is filtered.

Abstract: A high efficiency particulate air filter, and a method of fabricating the same, are disclosed, with the filter being characterized by being lightweight and readily disposable after use. Further, the filter may be fabricated in a basic or universal form, which permits it to be utilized to form any one of a number of possible specific mounting configurations by the placement of one or more specifically designed headers about the outer periphery. The filter comprises a sheet of HEPA filtering media folded upon itself in accordion fashion to form a filter pack, and a relatively thin and lightweight peripheral frame surrounding and supporting the pack. The frame is composed of a relatively hard, crust-like, air impermeable molded material which is self-bonded and sealed to the filter pack to effectively preclude the leakage of air therebetween.

Abstract: A filter apparatus is disclosed for removing contaminants directly from paper handling machines in data processing rooms. Such contaminants include paper dust and carbon black from high speed paper handling machines such as computer printers, paper cutters and the like. The apparatus comprises a wheeled housing having a top cover with an outlet grille. A squirrel cage fan is suspended from the cover beneath the grille. A filter pack is mounted beneath the fan. The bottom of the housing has an inlet opening connected to a duct which passes air from the machine being serviced, through the filter pack and out the grille.A vacuum motor is mounted in the bottom of the housing and connected to a flexible hose for picking up material on the floor as well as spillage from inside the data processing machines. This material is passed through an in-line filter. The air from both the duct and the flexible hose is passed through the filter pack.

Abstract: A container for sterilizing, and storing and presenting surgical instruments and materials in a sterilized condition has a container base member with a cover and bottom and side apertures for passage of a sterilizing agent; a sealing gasket between the container cover and the base member provides a seal and a tortuous path constituting a probability filter is provided exteriorly of the seal; a removable tray for instruments to be sterilized is carried within the container; a removable filter element commensurate in shape to the container base member is located intermediate the removable tray and the bottom of the container base member; the filter element may be of a soft formed element or may have a frame and is located with a portion extending outwardly between the base member and cover past the sealing gasket; the filter element provides a filter path permitting passage of sterilizing agent received through the bottom and side apertures into the container while the filter element inside the container and th

Abstract: A powder-air separator with a filter made by sintering short-cut filament-shaped particles or by sintering a mixture of short-cut filament-shaped particles and ordinary atomized round particles.

Abstract: The present invention is directed to a device (50) for providing filtration of air. The device includes a body (70) and a cover (72) with each having endless mating structure (76) and (78) which may be welded together thereby mechanically pinching a flat sheet filter media (74) and holding it in place. The cut edge of the filter media (74) is encapsulated. The filter media (74) is held outwardly from bottom (92) of body (70) by gussets (90) to provide sufficient area for air to pass through. Inlet openings (110) are provided between top (94) and endless mating structure (78) in a fashion which allows top (94) to be attached to a flat wall of a sealed housing of a type used for disk drive systems.

Abstract: A lint and raveling collector for a clothes dryer is installed on the side of the rotating drum. The lint and raveling collector has a lint and raveling filter and a lint and raveling collecting box. The lint and raveling filter has a net-like filter member, and ribs provided on the surface of the net-like filter member to prevent friction between the filter member and the clothing. The collecting box has an opening formed at its portion facing the ribs. The collecting box covers the lint and raveling filter in such a manner that a space for accumulating the lint and raveling is defined between the lint and raveling filter and the inner wall of the whole portion of the collecting box except for the opening portion. By provision of the ribs, the lint and raveling can not pass through the interstices of the filter member, and clothing is prevented from directly rubbing against the surface of the filter member.

Abstract: The specification discloses a filter stack in which a plurality of individual tapered frames with openings on their widest sides are alternatively aligned, with filter paper between adjacent frames, such that the openings in one frame face one way and those in the next adjacent frame face the other way. Parallel tongues projecting from one surface of the frames insure that filter paper will be clamped in place. Air leaks are eliminated by shrink-wrapping said stack of frames, except on the ends with openings, to firmly hold them together.

Abstract: A filter assembly includes a casing having a support panel to support the filter element and upstanding walls extending around the periphery of the casing. The corners between the walls are reinforced by a pair of tabs extending, each extending from a respective one of the walls and co-operating with the other wall to provide a double layer of reinforcement. The walls are inclined to the support panel to permit nesting of the casings during transport.

Abstract: Apparatus for releasably securing filter elements against an apertured tube sheet in a dust collector filter housing includes a pair of locking bars movable between a first position spaced from the tube sheet and a second position adjacent the sheet. Resilient means on the locking bars press portions of the filter elements into sealing engagement with the tube sheet so that the filter elements depend from the sheet when the bars are in the second position and apparatus is provided for shifting the bars between the first and second positions.

Abstract: An air filter comprising a first layer of reticulated foam plastic material having a thickness of between 10 mm and 20 mm and a porosity of between 5 and 60 pores to the linear inch, a second layer of reticulated foam plastic material having a thickness of between 6 mm and 10 mm and a porosity of between 60 and 100 pores to the linear inch, and at the interface between said first and second layers an open mesh substrate approximately one millimeter in thickness constricting a maximum of about ten percent of each of the first and second layers, the filter being impregnated with a flame proof retention and plasticizer additive, the first and second layers being bonded together at the interface.

Abstract: A carburetor chamber cover device for covering a carburetor chamber of a portable power-driven machine such as a chain saw. The carburetor chamber accommodates an air cleaner and a carburetor for supplying air-fuel mixture to an internal combustion engine. The cover device comprises a cover adapted to close the opening of the carburetor chamber and having an aperture, and a filter plate and a blind plate adapted to be selectively attached to the cover so as to fit the aperture. The filter plate has a screen capable of arresting comparatively large particles of dust. In order to avoid troubles such as blocking of the filter plate by snow or icing of the carburetor, the filter plate is detached and the blind plate is attached instead.

Abstract: A fragrant scented air filter particularly adapted for use in conjunction with interior building/air conditioning systems which includes a polygonal frame of a U-shaped inwardly opening cross-section defined by a bight portion and a pair of legs, a pad of air permeable, porous, fibrous filtering material having a peripheral edge portion bordered by the frame, and at least two solid rods of fragrant scented material spanning the frame in embedded relationship to the pad and in spaced parallel relationship to each other whereby air can freely pass the same with minimum velocity reduction and maximum fragrance absorption.

Abstract: A frame is made from a one-piece paperboard blank which is formed in a collapsed shipment and storage blank configuration. The collapsed frame can be manually expanded for use. The corners of the expanded frame are locked by locking tabs and locking slots which hold the frame in its expanded state. The frame can be used to hold air filters which are used to filter the air entering a hot air furnace.

Abstract: A filter assembly having clamping means for resiliently engaging marginal areas of the filter media and wherein the clamping means comprises elongate members engaging material facial portions of the filter media and clips supportingly carrying the elongate members with each of the clips having an arm connected to the elongate members and being pivotally movable to first and second positions and wherein in the first position the elongate members carried by respective arms are in biased clamping engagement with the filter media and wherein in the second position the elongate members are away from and out of clamping engagement with the filter media to facilitate replacement thereof.

Abstract: This invention provides an improved construction for air filters wherein the filter frame is provided with indentations or recesses adjacent to its opposite corners which allow a plurality of filters to nest together in a laterally offset relationship to conserve space. The invention can be employed with an air filter including a filter element of fibrous material and a frame for supporting the filter element at its marginal edges. A set of recesses is formed in the same face of the filter frame and located along adjacent sides of the frame at positions adjacent to its opposite corners. The recesses are spaced from diagonally opposite corners of the filter frame by substantially the same distance to permit a pair of filters to nest together in a laterally offset relationship for shipment or storage.

Abstract: A railway car for transporting pulverulent lading includes a fluid-tight container, slope sheets mounted within the container defining two troughs leading to a sump in the lower portion of the container, two aligned permeable conveyors in the bottom of each trough, an apparatus for alternately aerating each permeable conveyor in each trough for fluidizing the lading to facilitate movement thereof into the sump. Discharge valve structure is provided below the sump for pneumatically unloading the container pipe for pressurizing the space between the slope sheets and the container, and a pipe interconnecting the top of the container and the discharge valve structure for conveying air from within the container to the discharge valve structure during unloading of the container, are also provided.

Abstract: Disclosed are filters which are particularly useful in sampling devices for detecting radioactive particulate contaminants in a gaseous medium, such as air. The filters comprise a filter membrane sandwiched between two pieces of plastic material having holes exposing the filter membrane to the gaseous medium. The filters can readily be handled by grasping them by their plastic portions and there is little risk of the filter medium being damaged. An air tight seal may easily be made with the plastic surrounding the filter medium. The filter is easily constructed by placing a piece of filter material to cover a hole in a plastic base layer and then covering them both with a plastic cover layer having a hole to match the hole in the base layer. The cover layer is preferably formed of self-adhesive layer.

Abstract: A circular array of accordian pleated filter material is core and edge sealed, placed in a supporting shell, peripherally sealed thereinplace and capped. Core sealing of the array of filter material is accomplished with a fill of hot melt adhesive and edge sealing with application of a covering strip of the same or a similar hot melt adhesive. An overlay of heat shrinkable tape provides final tight sealing and rigidification of the structure.

Abstract: This invention provides an improved construction for air filters wherein the filter frame is provided with indentations or recesses adjacent to its opposite corners which allow a plurality of filters to nest together in a laterally offset relationship to conserve space. The invention can be employed with an air filter including a filter element of fibrous material and a frame for supporting the filter element at its marginal edges. Preferably, a set of recesses is formed in the filter frame at positions adjacent to its diagonally opposite corners. Each recess is adapted to receive the frame of another air filter to permit the filters to nest together in a laterally offset relationship for shipment or storage. The air filters are arranged in a stack with alternate filters in the stack diagonally displaced relative to the remaining air filters. The recesses permit each air filter to be nested with one or both of its neighbors.

Abstract: A filter device having a first housing and a second housing clasping therebetween a filter membrane. The housings are domed or convexly-shaped and have cylindrical hubs. A peripheral flange extends radially away from each of said dome-shaped housings and one of the pheripheral flanges has integrally formed thereon a plurality of ribs of predetermined length laying on a circumference of said one peripheral flange at arcuate locations therearound. The filter membrane is of circular configuration having radial projections extending around the circumference thereof. The ribs fit between the projections so that ultrasonic welding melts the ribs and fuses the two housings together, holding the filter membrane therebetween.

Abstract: An air filter assembly is provided which comprises a compressible air pervious multi-sided filter panel and a frame therefor, the latter being adjustable from a collapsed first mode to an operative second mode. The frame of foldable sheet material includes a foraminous center section in supporting engagement with the filter panel; a marginal section delimiting the center section; and a plurality of elongated peripheral sections arranged in alternate pairs and foldably connected to an coacting with the marginal section and with each other to form a hollow verge encompassing the filter panel periphery when the frame is in the second mode. The peripheral sections form a substantially flat multiply flange overlapping and compressing the filter panel periphery when the frame is in the first mode. A first pair of alternate peripheral sections have the opposite end portions thereof overlying corresponding end portions of a second pair of alternate peripheral sections when the frame is in the first mode.

Abstract: Improved disposable nose and mouth filter masks are disclosed each of which is comprised of a sheet of a suitable air filtering material, sized and configurated for use in pairs to individually loosely cover the mouth and nostrils of the face of a wearer. A continuous peripheral adhesive strip is applied to peripheral edge areas of the filters with a removable backing strip being normally engaged on the inner exposed adhesive surface, the adhesive strips being applied in overlapping relation in the area between the nose and mouth of the user.

Abstract: A dual filter system for heaters and airconditioners comprising releaseably securable throwaway secondary filter secured to a disposeable or permanent primary filter.

Abstract: An improved air filter panel of the type having a fibrous filter batt and a circumferential support frame surrounding the batt, the frame having an axially extending frame element, the frame element being folded transversely to form frame sidewalls, the sides of the batt being connected to the sidewalls of the frame, the ends of the folded frame element being fastened together to secure the batt in place within the surrounding sidewalls, the improvement comprising an improved frame end fastening means, the means comprising a tab connected at a fixed end thereof to the sidewall of the support frame adjacent one end of the frame element, the tab having a neck portion at the fixed end and a head portion adjacent a free end thereof, the head portion being connected along a portion of a following edge thereof to the neck portion, the remaining unconnected portion of the following edge providing a flange portion, and a slot in the sidewall adjacent the end of the frame element opposing the tabbed end, the slot bein

Abstract: A portable gas cleaning unit having a box-shaped housing supporting filters operable to remove particulates, pollens, odors, and smoke from a gas, as air. A motor driven fan located within the housing moves gas through the filters and discharges cleaned gas to the environment outside of the housing. In one form of the invention, the motor is a D. C. motor powered by a 12-volt battery. The filters are mounted in a recess in the top wall of the housing and include a coarse fiber filter and a particulate charcoal filter. A protective open rectangular grid is located over the fiber filter and is mounted with a tight fit on the top wall to hold the filters in the recess. An open top tank is located within the housing for carrying a liquid, as water. Vapor plates mounted on the tank are used to facilitate the evaporation of liquid into the gas flowing through the housing.