Abstract: A duct filter bag (1) for a vacuum cleaner having a holding plate (2, 15) which has a tightly closed opening (4) for a pipe connection of a vacuum cleaner, the opening being adapted to be closed from the outside by a separate closure flap (5) which has an insertion region (8, 9, 11). In order to make the dust filter bag (1) more favorable in use, the closure flap (5) is hinged to the holding plate (2) laterally of its region of swing (V).

Abstract: A cyclone separator formed by a plurality of parallel tubes and a plurality of fins. Each tube is configured in a multitude of segments. One segment of the tubes forms a cylindrical section, one segment is bent inwardly to form a roof section, and one segment is bent inwardly to form a conically-shaped hopper section. As the circumference and diameter of the hopper section decreases from top to bottom, at least a portion of the tubes are configured, either by being extracted or swaged, to accommodate the decreasing circumference and diameter, which results in an increase in the heat recovery of the water-cooled heat transfer tubes without the need for an intermediate ring header.

Abstract: The invention provides a radon daughter dosemeter made up of a cyclone, a filter in a filter holder and a radiation detector spaced from the filter. The filter is arranged to filter dust and aerosol particles from air issuing from the air outlet of the cyclone, and the detector is arranged to detect radiation from dust and aerosol particles on the filter. The invention also provides a method of monitoring radiation exposure of persons; and an electrochemical etching cell for the etching of detectors used in the dosemeter.

Abstract: A bladder control mechanism of a tire vulcanizer includes an actuating mechanism for moving a bladder holder and a bladder gripping bowl of an upper bladder clamp relative to one another. A spring of the control mechanism imparts a gripping force to the bladder holder. Therefore, no re-tightening is required while a bladder is in use. When the bladder is to be changed, the actuating mechanism is actuated to forcibly separate the bladder holder from the bladder gripping bowl in opposition to the spring. As a result, the bladder holder frees the edge portion of the bladder. Further, due to a bayonet connection, the bladder can be readily changed in a short time by turning and removing the bladder holder.

Abstract: A fume and dust collector system is comprised of a semi-rigid tubular filter compressively held against a sub-base by a beam. To dislodge accumulated particulate, a combination of gravity hammer rapping of the beam compressively loads the filter wall and pulses of air discharged into the filter interior tension the wall. The filter is removed through the top of the enclosure and particulate is removed through a drawer at the bottom.

Abstract: A horizontally mounted filter cartridge dust collector includes a housing and a plurality of filter cartridges horizontally mounted in rows on a cartridge cradle disposed inside the housing for supporting the cartridges. The cartridge cradle includes a plurality of vertical risers and horizontal tubes attached between the risers and an inner wall of the housing separating the dirty and clean air plenums. A single access door facilitates inspection and servicing of all of the filter cartridges and the entire dirty air plenum. Pairs of studs attached to the inner wall mate with corresponding grooves in the cartridge end caps to precisely locate the horizontal and vertical positions of the cartridges. Clamping mechanisms are provided to compress and seal each row of cartridges to isolate the clean and dirty air plenums. Each clamping mechanism includes a rotatable shoe for isolating the cartridges and gasket seals from torque being applied to operate the clamping mechanism.

Abstract: A bag securing and tensioning system for a vacuum cleaner includes a duct for directing a flow of dirt-laden air from an inlet thereof to an outlet thereof, a porous outer bag and a connection member for releasably mounting the outer bag to the outlet end of the duct. The connection member includes a longitudinally extending slot located in a handle of the vacuum cleaner and a bag guide member including an extension slidably mounted in the slot. A bag clip is secured to the bag guide member. The bag clip holds an end of the porous outer bag.

Abstract: A filter assembly of the Vee-panel type comprising a filter frame and a plurality of complementary pairs of replaceable filter panels slidably disposed within the frame and defining a plurality of adjacent Vee's with the apexes of the Vee's being disposed adjacent the air outlet end of the assembly. The filter frame defines a plurality of rectangular perimeter panel retention surfaces thereon adjacent the sides of the filter panels for retaining the panels in place and forming an air tight perimeter seal therewith. A compressible gasket is disposed about each of the panel retention surfaces.

Abstract: A loading apparatus is provided for receiving solid particulate material entrained in gas stream. The loading apparatus separates the particulate material, such as plastic pellets or plastic regrind, from the gas stream so that the particulate material is retained in the loading apparatus for subsequent loading into another receiving vessel or into an injection molding machine. The gas stream leaves the loading apparatus substantially free of particulate material. The entrained particulate material enters the generally cylindrical loading apparatus in a tangential direction and the reduction in speed of the gas stream causes the particulate material to fall out into the inverted frusto-conical lower section of the loading apparatus. Gas leaving the upper section of the loading apparatus is caused to reverse its circumferential flow before leaving the loading apparatus so that substantially all of the fines in the gas stream fall out into the body of the loading apparatus.

Abstract: A multi-stage cyclone separator apparatus is provided for separating particulates from gas in a particulate laden gas. The apparatus is particularly useful for separating particulates such as catalyst particles from hot refinery gas in fluid catalytic cracking reactors and regenerators. The apparatus makes economical use of space and provides for accommodation of stresses due to differential temperature expansion by providing a manifold or plenum chamber receiving partially cleaned outlet gases from a first stage of cyclone separators and providing an inlet therefore to a second stage of separators. The number of separators in each stage are independent of those in the other stage. By arrangement around the periphery of the intermediate manifold chamber and suspension from a top of the housing the separators in the different stages may be efficiently interfitted without interference from separator dip legs as well as providing support for the structure to accommodate thermal stresses.

Abstract: An air cleaning system for a vehicle passenger compartment comprises of a first air cleaner unit and a second air cleaner unit. The first air cleaner unit is arranged to discharge air of the vehicle passenger compartment to the outside of the vehicle and to circulate the air upon cleaning the air. The second air cleaner unit is arranged to inhale outside air into the vehicle passenger compartment upon cleaning the outside air. When the air pollution level in the vehicle passenger compartment is high, the air cleaning system is operated to inhale outside air due to the operation of the second air cleaner unit and to discharge inside air due to the operation of the first air cleaner unit. Furthermore, the first air cleaner unit is formed in a thin-box shape and installed on a rear parcel shelf so as to improve the rearward visibility.

Abstract: The invention relates to an electric vacuum cleaner having a filter bag intermediate carrier disposed between a filter cassette arranged above a motor-driven blower and the motor housing. The intermediate carrier is pivotally mounted via a hinge and has guide cams which dip into engaging recesses of a base plate of the filter bag. The vacuum cleaner apparatus can only be operated with filter bags which are specific to this apparatus. Safety cams are formed on the intermediate carrier and follow the inner wall surface of the filter cassette when the intermediate carrier is closed. Catches are formed on the inner wall surface but do not catch the safety cams if an authorized filter bag is placed in the filter cassette. However, if an unauthorized filter bag is placed in the filter cassette, then the structure of this filter bag causes the safety cams to deflect and catch in the catches thereby preventing the operator from completely closing the intermediate carrier on the filter cassette.

Abstract: A dust separator (1, 2) is provided for removing particles from a gas, provided with a centrifuge (3) which is rotatable about a central axis and which comprises at least two centrifuge chambers (7, 9). A first centrifuge chamber (7) is connected at one side to a gas inlet (11) and an opposing other side to a gas reversal chamber (13) which in its turn is connected to a second centrifuge chamber (9) which comprises a filter (17) and which concentrically surrounds the first centrifuge chamber (7).

Abstract: A clean air apparatus comprises a body in which clean air is supplied, an I/O port having an opening for carrying a carrier housing objects to be treated in/out of the body, a door which opens/closes the opening, and dust preventing device for preventing dusts from entering the body from the outside through the opening, when the door is opened.

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

Abstract: An improved air filtration apparatus of the rotary prefilter type having a rotating filter screen disposed in a wall of the filter housing is equipped with a constricted suction nozzle which is reciprocable radially across the rotating filter surface to remove debris accumulated thereon. Operation of the suction nozzle is controlled in relation to the pressure drop across the filter to maintain the pressure drop within a predetermined desired range.

Abstract: The method of controlling a duration of an adsorption cycle in a process of adsorbing moisture from a gas, particularly air, using an adsorbing material including the steps of passing a moisture-carrying gas and a heated regenerating medium alternatingly through the adsorbing material in a series of alternating adsorption cycles and regeneration cycles, consists of monitoring, during a regeneration cycle, only a decrease of weight of the adsorbing material; comparing the decrease in weight of the adsorbing material to a preset value; and controlling the duration of an adsorption cycle immediately following the regeneration cycle according to the comparing. Alternatively, the method of controlling the duration of the adsorption cycle consists of monitoring, during an absorption cycle, only an increase of weight of the adsorbing material; comparing the increase in weight of the adsorbing material during the monitoring to a preset value; and switching to regeneration when the preset value is reached.

Abstract: A device for separating fibers and gas, comprising a cyclone (1) with inlet (2) for a mixture of fiber/gas and separate outlets (3 and 5, respectively) for fibers and gas, respectively. In front of the gas outlet (5) a screen (6, 10) is located, which is provided with apertures and attached on a rotatable shaft, so that the rotation of the screen gives rise to accelerations and forces preventing fibers from passing through the apertures in the screen (6, 10).

Abstract: An air flow system for removing airborne particulate material includes a bank of filters through which air is moved in one direction, thus depositing particulate material on an air input side of the filters. A vacuum head associated with a secondary vacuum system is intermittently applied in a reciprocating movement to selected portions of the air input side of the filters for cleaning them, while the remaining portions of the filters continue to operate in the normal manner without interruption. Both the filters and the vacuum head are provided with integrally formed interengaging guide means which facilitate this operation.

Abstract: This invention relates to an improved mechanical separator which is capable of continuous operation without clogging, which is capable of efficiently separating particulate material from a gaseous medium such as air in such a manner that the collected particulate material may be salvaged, and which apparatus is environmentally friendly in that it cleans gases such as air in a highly efficient manner while at the same time saving potentially valuable products which would otherwise be mainly lost.