Abstract: An apparatus for separating liquids and solids from a mixture thereof comprises a trough structure (12) in which is suspended a filter means (14) on which the mixture can be placed. A vacuum mechanism (16) draws a vacuum beneath the filter means to draw the liquids downwardly from the solids, and a oscillating mechanism (20) causes the remaining solids on the filter to move in a conveying direction. A flexible perforated sheet (60) is provided beneath and in generally continuous contact with the filter means (14) and which can be intermittently flexed to maintain the filter means unobstructed by solids.

Abstract: The invention comprises a screening device for separating fine particles from a stream of air and a particulate mixture containing coarse and fines which includes a box-like hollow housing tilted downwardly at an acute angle. The housing contains a plurality of elongated screening elements and an air cleaning device consisting of a blowpipe and a series of nozzles directed at the screening elements through Venturi tubes. At periodic intervals a jet or pulse of air is injected into the Venturi tubes to reverse air flow and rid the screen elements of adhered coarse particles. Substantially complete fines removal can be achieved by employing a recycling loop between the coarse particle outlet and inlet of the housing.

Abstract: A high consistency pressure screen comprises a screen including a profiled inner surface and a rotor including a profiled outer surface rotating adjacent and spaced from the profiled screen to produce a positive-negative pulsation cycle of approximatey 50%--50%.

Abstract: An apparatus for removing solid particles from cooling water having a tubular housing (1), a funnel-shaped trap sieve (4) attached to the inner housing wall with the tip facing in the flow direction, and a pressurized water sprayer (11). The sprayer includes a washer arm (14), concentrally rotatable about the downstream side (23) of trap sieve (4), and having at least one slit nozzle (15) directed toward the downstream surface (23). A suction tube (8) extends into a collecting chamber (10) of trap sieve (4). To prevent large particles from jamming rotating components, trap sieve (4) is cleaned by spraying water only against the downstream side. The tip of the sieve is defined by a cylindrical container (5) having a closed bottom (6). The intake end (9) of suction tube (8) extends into the container. Wash water is introduced into washer arm (14) through an inner end fixedly attached to a hollow flange (13) mounted on a rotary shaft (12) of pressurized spray apparatus (11).

Abstract: An apparatus is described which separates small solids from process waste water. A continuously rotating elongated drum screen in a three foot diameter flow channel removes the solids. The solids are deposited by spray wash into a dewatering chamber. The screen components include row of closely spaced links and pivot members connected end-to-end to form a continuous loop mounted within a frame driven by a variable speed motor.

Abstract: The separation of a first solid component from a mixture thereof with a liquid and a second solid component which is of smaller average particle size than the first solid component, the first and second solid components being in suspension in the liquid and with the percentage by mass of the second solid component being substantially greater than that of the first solid component, by means of a travelling endless cloth. The cloth passes through an operative separating region in a horizontal manner. The mixture is fed onto substantially the entire operative separating region from a feed box that has a floor with apertures therein; the floor being located above the cloth. The liquid and second solid component pass through the cloth, to be collected by a trough. The first solid component remains on the cloth and is subsequently removed and collected.

Abstract: Improved sieving apparatus for size analysis of dry powder having a sample chamber floored by a sieving screen and an underlying fines chamber adapted to be mated in fluid communication therewith. Disposed beneath the screen is a jet emitting rotor of selective configuration adapted to emit an upwardly directed air jet curtain to repeatedly sweep the underside of the screen to both improve the screening action and to reduce the required time therefore.

Abstract: A classifier for separating particulate matter into relatively coarse and fine particles. The classifier includes a casing, at least one cylindrical screen assembly mounted in the casing and extending substantially in the direction in which the particulate matter flows in the casing for forcing the fine particles to traverse the cylindrical screen assembly, and at least one air purge pipe disposed in the casing for blowing air against the screen assembly to remove particles off the latter screen assembly, the cylindrical screen assembly and the air purge pipe being relatively movable by a drive mechanism. The cylindrical screen assembly has an increased degree of mechanical strength and rigidity, and provides a wide effective area available for screening.

Abstract: A screen machine, particularly for cellulose pulp and recycled pulp, which includes a screen rotor (15), which is rotatable in a housing (16) having an inlet (17) for pulp suspension, an outlet (18) for accepts and a discharge opening (19) for rejects. The screen rotor (15) is so arranged between the inlet (17) and the outlet (18) that flow therethrough from its inlet side has a radially inward directed component. On the outlet side of the rotor (15) is arranged at least one stationary baffle means (26), which separates a sector of the screen rotor from the outlet. Along at least a part of this sector there is communication between the inlet (17) and the space between the rotor (15) and the baffle means (26).

Abstract: Method and apparatus for making a sharp separation of solids into components which are finer than the screen mesh and coarser then the screen mesh. The solids ladened fluid is introduced onto a screen to separate coarse solids from fine solids. A tray containing a body of aqueous liquid is vibrated causing the aqueous liquid to repeatedly contact the solids while on the screen to provide the needed mobility for fine particles to pass through the screen with the liquid. The aqueous liquid returns to the tray and the vibration of the tray aids in removal of the fine solids which have passed through the screen from the tray. Aqueous liquid is continuously added to the tray or sprayed above the screen to keep accumulated solids from increasing the viscosity of the aqueous liquid in the tray.

Abstract: Apparatus is provided to size finely divided catalyst particles so that all of the catalyst particles passing through the apparatus are sized so as to have a maximum particle diameter. The apparatus includes:(a) A sealed cylindrical housing having an arcuate opening cut into its lower surface,(b) A fine mesh screen which overlaps the arcuate opening cut into the cylindrical housing,(c) A hemicylindrical housing attached to the lower surface of the cylindrical housing and defining a cavity in communication with the cylindrical housing,(d) An inlet port in the top center surface of the cylindrical housing,(e) An outlet port in the bottom center surface of the hemicylindrical housing,(f) A shaft rotating axially within the cylindrical housing and having brushes attached thereto which force catalyst particles from the cylindrical housing through the screen and break down catalyst agglomerates introduced into the cylindrical housing.

Abstract: A method for classifying wet coal for obtaining coal charges suitable for use in a coke oven comprising classifying the wet coal directly in a cylindrical screen which rotates and revolves around an eccentric rotation shaft while blowing a high pressure gas stream to the screen to eliminate adhesion of the wet coal particles to the screen. The method enables a continuous and consistent classification of wet coals without the clogging of the screen and the dust pollution. The cokes obtained by dry distillation of the coal classified by the present method show high quality.

Abstract: A high transfer pressure device, and method, especially adapted for continuously conveying hard particulate material such as coal; and a screen specifically for use in such conveying. The high pressure transfer device includes a pocketed rotor containing a pair of diametrically through-going pockets perpendicular to each other, a housing enclosing the rotor and having four ports spaced around the periphery thereof, and a screen operatively associated with the rotor or the ports for screening out particles above a predetermined size that are conveyed in liquid passed through the device. Preferably the screen is associated with one of the ports of the housing and fluid injection nozzles are associated with the screen for injecting liquid under pressure toward the screen to effect dislodgement of any particles that may be lodged in the screen and thereby prevent damage to the screen. The operation of the fluid injection nozzles is timed to the rotation of the rotor.

Abstract: A sluice box apparatus for recovering heavy material, such as gold, comprises a fine recovery channel and a coarse recovery channel. The recovery channels have receiving ends, riffles and matting for collecting fines of the material. A hopper at the receiving end of the channels has a receiving end for aggregate, a discharge end adjacent the receiving ends of the channels, a bottom, an open top and water distributing means near the top and the discharge end for washing fines from the aggregate. A perforated plate extends substantially across the hopper near the discharge end. The plate is spaced-apart from the bottom. There is a coarse material discharge opening adjacent the coarse recovery channel for a flow of water and aggregate passing over the perforated plate to the coarse recovery channel and a fine material discharge opening between the bottom end and the perforated plate and adjacent the fine recovery channel.

Abstract: Apparatus for separating a composite of three materials into their particular groups includes a first screen (17) which permits the group of the smallest sized material to pass therethrough. The materials not passing through the screen (17) are fed to a trough (21). Second screens (23) are provided near the end of the trough which permits the group of the mid-sized materials to pass therethrough. The group of the largest sized materials move to and through a discharge spout (25) at the end of the trough (21).

Abstract: A method for classifying wet coal for obtaining coal charges suitable for use in a coke oven comprising classifying the wet coal directly in a cylindrical screen which rotates and revolves around an eccentric rotation shaft while blowing a high pressure gas stream to the screen to eliminate adhesion of the wet coal particles to the screen. The method enables a continuous and consistent classification of wet coals without the clogging of the screen and the dust pollution. The cokes obtained by dry distillation of the coal classified by the present method show high quality.

Abstract: A device for primary separation of valuable ore material from gravel or other waste in placer mining prior to sluicing. The separator comprises a frame having sides and front and back ends and adapted to be inclined at an angle to the horizontal during operation. A material entrance is provided at the elevated end. A screen comprising a plurality of hinged rigid plates, laterally extending across the frame, extends from side to side and front to back of the frame and is supported within the frame. The end of the screen at the elevated end of the separator is secured to the frame. The plates are spaced from adjacent plates a pre-determined distance. Screen distortion means comprising a plurality of spaced rows of rounded projections are mounted on the carriage. These projections bear against the bottom surface of the screen whereby, during operation, they move with the carriage back and forth beneath the hinged plates to create a wave action on the screen to move material across the screen from front to back.

Abstract: An in-line apparatus for separating oversize particles from a pressurized fluid slurry which comprises:a rigid, hollow body member capable of withstanding the pressure of the fluid slurry, the body member having a valved slurry inlet port and a slurry outlet port, each port adapted to mate with slurry conduit means;a washer access port opposite from and in axial alignment with the slurry outlet port;a hollow, open-ended screen assembly fixedly mounted within the body member between and in axial alignment with the slurry outlet port and the washer access port;a valved oversize particle discharge port at the lowermost end of the body member adapted to mate with oversize particle conduit means; andretractable backwasher means externally mounted on the body member in axial alignment with the washer access port and the screen assembly, where the backwasher means comprises a fluid discharging spray head adapted to pass axially through the interior of the screen assembly, whereby a pressurized backwashing fluid is d

Abstract: A sifting or screening device includes inner and outer concentric screened enclosures which rotate about a common axis. An inlet is provided at one axial end of the inner enclosure and an outlet is provided at the opposite axial end of the enclosures for the material that was too large to pass through the openings defined by the screens. An inclined dead plate or baffle member is provided at the inlet to prevent material fed in through a chute from impinging directly on the screen material and a pressurized air system presents a pulsating curtain of air to disengage material which has become lodged in the screen. A novel support system includes a circular support surface at the inlet end which rides on a pair of bearings and a central axle coincident with the axis of rotation driven by a motor at the outlet end. The axis of rotation is caused to lie at a small angle to the horizontal so that material which will not pass through the screens will slowly fall toward the outlet end of the enclosures.

Abstract: A screening apparatus for screening fibrous material in liquid suspension includes a housing having an inlet and accept fraction outlet and reject fraction outlet. The suspension is introduced under pressure via the inlet. A cylindrical screen is positioned centrally within the housing to define an involute reject passage within the housing and outboard of the screen with the rejected fraction passing under pressure from the reject passage outwardly of the housing via the rejected fraction outlet. The accepted fraction passes from the reject passage inwardly through the screen and is then passaged under pressure outwardly of the housing via the accepted fraction outlet. The suspension is under pressure in its travel through the apparatus and is pulsed en route by a plurality of elastically mounted diaphragms driven in compressing and decompressing strokes by means eccentrically mounted on a rotating mainshaft.

Abstract: Herein described is a machine for removing raisins spoiled by mold from good raisins. An angularly disposed rotating screened cylinder causes raisins to be lifted and dropped to the bottom of the cylinder. Because of the fact that the bad raisins are soft and sticky they will stick to the screen. Good raisins will be tumbled towards the bottom of the screened cylinder and out. Spray nozzles force water through the screened cylinder washing the stuck raisins into a trough where they are kept separate from the good raisins.

Abstract: Apparatus for separating snakeskins and fines from pellets in a collection of polymeric material wherein a first nozzle impinges the collection of polymeric material in a stream of air on a moving screen having a mesh size such that the screen will allow the air and fines to pass but will retain the pellets and snakeskins, the air stream carrying the fines through the screen into a closed compartment. A second nozzle is positioned to allow air from the closed compartment to move upwardly through the screen at a different location from the first nozzle to lift and remove snakeskins from the screen.

Abstract: An apparatus for the separation of solids and liquids from a suspension has a hollow drum rotatably mounted about a horizontal axis. The drum wall is a screen made of a plurality of wires, preferably wedge-sectioned wires; spaced apart in a parallel arrangement and lying axially along the drum. Inlet means direct the suspension against the inner surface of the wall at an angle less than right angles, and preferably substantially tangentially to the inner surface, in a direction opposing the rotation of the drum. The separated solids remain within the drum and are extracted therefrom by suitable means.

Abstract: An apparatus for screening fibrous stock. A rotor is rotatably mounted within an open ended, cylindrical screen which is mounted in a hollow housing. Fibrous stock is introduced into the housing and rotation of the rotor causes the portion of the fibrous stock that will pass through the screen to do so. Any fibrous stock that passes through the screen is discharged from the housing. The rotor includes a cylindrical body member having a plurality of blade members attached thereto and spaced substantially evenly about the circumference of the body member and radiating outwardly therefrom. Each blade member has a leading edge and a trailing edge with the leading edge spaced farther from the body member than the trailing edge.

Abstract: In the opening and cleaning of fibrous materials apparatus is provided which includes a plurality of rotatable beaters within a housing, curved under grids beneath each rotatable beater, baffle plates above and between the beaters, a perforated screen positioned above and adjacent the beaters and a suction hood positioned over and embracing the whole upper surface of the perforated screen. The screen is inclined to the horizontal and the apparatus includes a suction duct extending across the lowermost edge for withdrawing air from an inlet slot along the opposite edge to create an air stream flowing over the whole surface of the screen such that dust and unusable fibres passing through the screen are carried away to a waste extraction duct.

Abstract: An apparatus having a bowl-shaped screen with a large opening at the upper end thereof and a smaller opening at the lower end thereof for screening annularly distributed influent. An influent manifold is located above the screen to distribute influent downwardly into the upper opening. An effluent receiver is positioned about the screen while a concentrate receiver is positioned below the lower opening of the screen. A distributor cone is positioned in the upper opening to direct influent outwardly and downwardly to the screen. The cone is vertically adjustable to vary the size of the annular opening between the cone and the screen. The cone is also rotatably mounted to aid in uniformity of distribution. A tangential influent feed is employed to induce rotation of the distribution cone. A rotatably mounted backspray manifold extends about the screen with nozzles directed to induce rotation of the manifold.