Abstract: A vacuum cleaner filter bag seal is used to form disposable vacuum cleaner bags by joining two portions of filtration material. The two portions of filtration material are sealed by placing them together and then crimping them so that the layers mechanically interlock. The invention also pertains to a method of providing such a seal.

Abstract: A dust collector blow tube having a blow tube (22) being open at a first end (32) and closed at a second end (36), the first end being reasonably and sealingly received over a supply pipe (12); the second end (36) being acted up by pressure means to place pressure on the second end (36) to force the first end (32) over the supply pipe (12); the pressure means is a cylinder (42) mounted about a vertical shaft (44) parallel to but spaced from the longitudinal axis of the cylinder (42) so as to provide a cam effect, rotation of the cylinder (42) about the vertical shaft (44) providing the necessary pressure.

Abstract: A fabric for filtering particulate matter from a stream of hot gases, e.g., from a diesel engine, has an unknotted weave of flexible, incompressible, uncrimped, spaced support yarns and flexible, lofty, fully crimped, fill yarns. During the weaving process, the fill yarns are pulled tightly against the support yarns so that they do not slip or shift. For greater assurance of good filtering, a filter employs multiple layers of the fabric, with the support yarns of each layer extending orthogonally to those of adjacent layers. For uses involving prolonged exposure to high temperature, both the support yarns and fill yarns can be continuous-filament ceramic yarns such as alumina-boria-silica yarns. For lower temperatures, the yarns can be primarily glass.

Abstract: A unique vacuum loader with a special tangential separator is provided to efficiently remove, readily collect, effectively separate, and safely dispose of wet, dry, and fibrous materials, including liquids and slurries, in a mine or in other places. Desirably, the tangential separator is compact for use in mines and has special directional vanes which vary the flow and enhance separation of dusty fluid carrying the fibrous material, dust, and other particulate matter.

Abstract: An oily smoke purifying apparatus of central processing system type comprising an upright housing on the inside bottom of which is provided a water tank equipped with a water pump that is connected to a multitude of branch pipes capable of spraying a screen of water so that the space between these pipes and a slant catch plate located under the pipes forms a cooling chamber. As oily smoke is drawn into the cooling chamber by the fans located in the upper portion of the housing, oil and steam are separated; the oily mud dropping into the water tank and then being collected in the waste oil tank, the steam being exhausted via the upper portion of the housing after being multiply filtered.

Abstract: An apparatus (10) for purifying gas distribution systems has a gas inlet (12) and a gas outlet (14) for connection to gas distribution lines (54). A housing (22) encloses a resistance heater (24) and a particle filter (26) for the gas. The resistance heater (24) is connected to the gas inlet (12) and the particle filter (26) is connected between the resistance heater (24) and the gas outlet (14). The resistance heater includes a sealed tube (26) defining a gas plenum (28). A resistance heater element enclosed in a cylindrical Inconel alloy shell (30) is centrally disposed in the sealed tube (26). A spiral ridge (32) winds around the shell (30) to define a spiral path for gas flowing through the plenum (28). The spiral ridge (32) has a narrower pitch near the gas inlet (12) and a wider pitch moving toward the filter (26) end of the plenum (28).

Abstract: A dust collector of the type wherein a main body of the dust collector includes one or more filter elements 11 which are permeable to air but not to airborne particles above a predetermined size, a live air zone 13 below the filter elements 11 and a main air inlet port 14; a vacuum being generated on that side of the filter elements 11 opposite the live zone 13 which thereby induces a pressure differential across the filter elements 11 whereby air and entrained particulate matter is drawn through the main air inlet port 14 into the live air zone 13 within the main body 17; the dust collector further including particulate matter guiding means 18 (in one particular form being in the form of a tubular shell) for changing the direction of movement of the entrained particulate matter in the main hopper immediately after it enters the main body from the main air inlet port 14; the particulate matter guiding means comprising a duct member 18, having at least one change in cross-sectional area therein from a smaller

Abstract: A filter device includes a first purifier chamber having a first recess. A first filter cartridge is capable of being disposed within the first recess. A second purifier chamber, including a second recess, is included in the filter device. A second filter cartridge is capable of being disposed within the second recess. A contour element is associated with the second filter cartridge, the contour element being configured to resist insertion of the second filter cartridge within the first recess. A mounting portion is formed in each recess and is configured to engage with a mating portion formed on each filter cartridge. The mating portion of each type of filter cartridge is specific as to not be able to be inserted into any recess but those recesses configured for that type of filter cartridge.

Abstract: The steam platen comprises spaced flat horizontal exterior walls each having a horizontal outside surface, and concentric cylindrical walls, one an inside wall and the other an outside wall both of which extend from the first to the second flat wall. The first flat wall abuts a mold half and the second flat wall abuts a supporting structure such as a base or a head, and these flat walls may be termed a mold sidewall and a bolster sidewall respectively. The interior space between the first and second flat walls has a plurality of partitions which extend from one flat wall to the other and which form one or more continuous serpentine steam passages which constitute a steam cavity. This steam cavity covers the entire area of the mold and is devoid of dead spots, so that the mold sidewall is heated by the steam to an essentially uniform surface temperature. For ease of fabrication, the platen may be formed as two separate pieces, i.e.

Abstract: A phase separator apparatus is disclosed which utilizes phase separator modules for insertion in a separation tank. The modules include a frame for retaining a plurality of impingement plates within the frame utilizing removable retention means, such as slots, allowing easy removal and replacement of the impingement plates. The phase separator module also includes vertical baffles for blocking the flow of fluid to be separated and forming a quiescent region on either side of the impingement plates normal to the direction of flow to the fluid to be separated. The removable retention means, such as slots in the frame, not only allow removal for cleaning and maintenance of the plates, but also provide a means for adjusting the spacing of the gap between the plates, the plate length or a combination of both, in order to modify the efficiency of the separator.

Abstract: A wire frame assembly for supporting an air filtration bag includes two wire form sections detachably coupled at a frame junction. Each frame section includes a plurality of wire elements extending along the length thereof, and presenting ends terminating at the frame junction. A generally annular ring is carried by one of the frame sections at the frame junction, with the ring protruding outwardly beyond the periphery of the frame assembly. The air filtration bag is accordingly isolated from coming into contact with the sharp wire element ends.

Abstract: An evaporative fuel control canister for use in an internal combustion engine includes a canister main body having a vapor absorbing chamber and a liquid separate chamber. The vapor absorbing chamber has a first portion filled with a vapor absorbing material, and a second spatial portion. The liquid separate chamber has an expansible and contractible member containing a liquid absorbing material. The vapor absorbing chamber is adjacent to the liquid separate chamber in a ventilation state. The canister includes a vapor passage coupling a fuel tank and the liquid separate chamber, and a purge passage coupling the internal combustion engine and the liquid separate chamber. The purge passage has a first opening positioned in the expansible and contractible member, and a second opening positioned in the second spatial portion.

Abstract: An industrial dust collector comprises mainly a base, a guide box, a motor, a suction fan, a suction hose, a filtration bag, a dust bag, and a pre-filtering means disposed between the guide box and the suction hose so as to filter out the objects considerably greater in size and weight than the dust in order to prevent such objects from damaging the suction fan and the dust bag.

Abstract: A clean room arrangement comprises a clean room having an upper portion and a lower portion. Clean air is introduced into the upper portion of the clean room, flows downward and expelled from the lower portion of the clean room. An air recirculation passage is connected to the clean room such that the lower portion of the clean room is communicated with the upper portion of the clean room. A heat source is provided in the air recirculation passage to generate an ascending flow of air in the air recirculation passage so that the air descends in the clean room due to natural convection.

Abstract: A modular, low-profile ceiling air filtration unit is disclosed having a diffuser plate with an unperforated zone along one edge, the remainder of the plate being perforated. A blower in the unit plenum directs air toward the end of the plenum having the unperforated zone. Turbulent air impinging on the housing end wall is prevented from passing through to a filter by the unperforated zone of the diffuser plate.

Abstract: A drop leg has a housing provided with top and bottom ends. The top end has an inlet and an outlet and the bottom end has a drain. An impingement plate supported within the housing is spaced from the top end to establish a separating chamber and to be directly contacted by the air stream through the inlet. The upper surface of the impingement plate is downwardly and inwardly inclined and has a central drain. The air stream striking the inclined surfaces rebounds towards the outlet. When vapors are also present, the drop leg is provided with a bulkhead which is sealed to the housing and establishes with the impingement plate an upper chamber and with the bottom end a settling chamber for contaminants separated from the air stream.

Abstract: A variable air filter system is described for convection and ventilation air flows, filter elements being introduced into the air flow in order to clean or purify the room air. To obtain an improved filtering effect, provision is made for filter elements to be disposed at a distance in front of or above the air-generating surface or the air-generating cross-section, the area of such filter elements being as large as or, if required, larger than the air-generating cross-section of the air-emitting surface. It is possible to provide the filter elements with the facility of enabling different inclination, form, overall depth, and length and height arrangement to be adjusted to the optimum value for filter efficiency in the air flow for cleaning.

Abstract: A combustion of a fuel-air mixture is used to provide a high-temperature and high-pressure pulse of gaseous combustion products for the back-flush cleaning of ceramic filter elements contained in a barrier filter system and utilized to separate particulates from particulate-laden process gases at high temperature and high pressure. The volume of gaseous combustion products provided by the combustion of the fuel-air mixture is preferably divided into a plurality of streams each passing through a sonic orifice and conveyed to the open end of each filter element as a high pressure pulse which passes through the filter elements and dislodges dust cake supported on a surface of the filter element.

Abstract: A bag assembly for a vacuum cleaner of the type having a housing defining a bag-receiving compartment, and a lid for closing an opening in the housing above the bag-receiving compartment. The bag assembly comprises a bag having a side wall with upper edge margins defining a bag mouth, and an annular bag support of synthetic resin material. The bag support has an annular wall with a generally vertical central axis, and an annular sealing formation adjacent the top of the wall. The upper edge margins of the bag are stitched to the annular wall of the bag support to provide a seal between the wall and the bag around the mouth of the bag. The bag assembly is placed in the bag-receiving compartment of the vacuum cleaner and the lid moved to a closed position in which the annular sealing formation on the bag support is sealingly engageable with the housing.

Abstract: A plastic molding device for a semiconductor element for plastic molding a semiconductor element on a lead frame, which comprises: an upper platen, a lower platen, and a movable platen movably provided at a tie bar which is provided between said two platens; an upper metal mold and a lower metal mold provided at the upper platen and the movable platen, respectively; a motor for applying a raising force for driving the movable platen; a driving force conversion mechanism for converting the rotation force of the motor into a reciprocative force; and a double toggle mechanism for giving the reciprocative force to the movable platen.