Abstract: A device for separating a mixture comprised of at least a continuous phase I and at least a disperse phase II, one of the phases being a light phase and the other being a heavy phase, comprising canalization means for canalizing a current of the mixture and suited for communicating thereto a helical motion along a central shaft (A) and filtration means, the motion leading to a differentiated radial displacement of the light phase and of the heavy phase under the action of the centrifugal force, during which the continuous phase I flows at least partly through said filtration means. The canalization means and filtration means are arranged to define a helical passage which decreases according to a direction of flow of the mixture through the device.

Abstract: Back-flushing filter device for the filtration of a highly viscous liquid with a housing (1) which has an inlet port (2) for the liquid to be filtered, a filter (3) and an outlet port (4) for filtrate, characterised in that,the filter (3) contacts, on its side facing the liquid to be filtered, a separating body (5) with recesses ("reject spaces") (6),the separating body (5) has inlet channels (7) for the liquid to be filtered, whereby the inlet channels run into the recesses (6),the separating body (5) has an outlet device (8, 8', 8") for the back-flushed liquid which is spatially separated from inlet channels (7),the housing (1) has a drain (9) for the back-flushed liquid, and thatthe entry port (2) and drain (9) are designed to be closable.

Abstract: An improved strainer device has a screen which receives a solid/mixture from a feed container for separation. To insure that an uneven flow of the mixture over the screen does not occur due to, for example, a non-level mounting, inlet rushing or turbulence, a weir structure is provided which raises the water mixture level above the screen by a predetermined height.

Abstract: A composite type screen includes a machine main body divided into a first structural part in which a first processing chamber is contained and a second structural part in which a second processing chamber is contained and a screen plate is interposed between the surfaces of the first structural part and the second structural part. Since a first rotary shaft having an impeller mounted thereto is disposed in the first processing chamber and a second rotary shaft having a rotor mounted thereto is disposed in the secondary processing chamber, the first rotary shaft does not pass through the first screen member. As a result, a seal member for the first screen member is not needed, whereby the number of parts is reduced and moreover a paper material can pass through the entire region of the first screen member and the area thereof through which the paper material passes is increased, so that a foreign substance removing efficiency can be improved.

Abstract: A device for cleaning large quantities of water (3) of rakings at overflow edges (2), especially from rain water reservoirs, rivers, etc., with a stationary separation area (10), which is formed as a section of a cylinder jacket (7) with an axis (8) parallel to the overflow edge, through which the quantity of water flows is provided. A takeover device (11), which is driven about an axis (8) of the cylinder jacket (7), is assigned to the separation area (10) for removing the rakings separated at the separation area (10).

Abstract: A self-cleaning stationary basket strainer has a housing with an inlet adjacent the top and an outlet adjacent the bottom, with a stationary strainer basket contained therein spaced from the wall of the housing. A flush discharge opening and a backwash discharge opening and provided in the closed bottom of the housing. A hollow backwash conduit is provided adjacent the inner surface of the strainer basket, adapted to move about the inner periphery thereof, and has a passage in the wall thereof communicating with a chamber in the conduit. A discharge section on the hollow backwash conduit communicates with the backwash discharge opening in the housing, the backwash discharge opening sealable when not in use. A scraper blade and extension member are provided on the hollow backwash conduit forming a channel which communicates with the passage. A rotatable brush may also be used which moves about the inner periphery of the strainer basket and brushes the inner surface of the strainer basket.

Abstract: A solid-liquid separator comprising a number of stationary rings arranged with spaces left therebetween, a number of floating rings each disposed movably in the spaces between the stationary rings and a screw conveyor provided in the inner space of the stationary and floating rings. The screw conveyor is driven in rotation to convey sludge water introduced into the space, and while being conveyed, only a water portion thereof is discharged to the exterior through the minute gaps between the floating and stationary rings. The motion of the floating ring prevents clogging of the solid portion in the minute gaps.

Abstract: A long sand trap for separating and removing sand from inflow channels, particularly of sewage treatment plants is provided with a settling channel (1) having in particular a trapezoidal cross-section and extending along a straight path. A transporting conveyor device (8) which is acting opposite to the direction of flow is provided in the bottom area (6). A classifying conveyor device (10) discharges the sand delivered from the transporting conveyor device (8) in an upwardly inclined manner. The classifying conveyor device (10) is arranged in the central longitudinal plane (3) of the settling channel (1). It has a discharge chute (17) which can be used selectively left-hand or right-hand.

Abstract: A waste disposer comprises a shredder section for shredding waste material and a water remover section coupled integrally with the shredder section for removing water from the waste material, in which the shredded waste material is carried upward throughout a cylindrical screen member mounted in the water remover section by the rotation of a screw while its containing water being removed and drained through apertures of the screen member. A plurality of vertically extending rib portions are arranged at equal intervals on the inner wall of the screen member so that screw blade comes in direct contact with the rib portions during its rotation. A plurality of pins are provided at equal intervals on the outer edge of the screw blade, each pin having a length sufficient to run directly on the inner wall of the screen member as the screw rotates.

Abstract: An appliance for sorting and deflaking fiber suspensions has a rotor with a horizontal axis rotatively mounted in a housing. In a first, inlet rotor zone the rotor is provided with entraining means for extracting by centrifugation contaminating particles of high relative density. The rotor is surrounded donwstream by a screening cylinder and is also provided with entraining means for the fiber suspension, which deflake and sort out the fiber suspension in a second rotor zone. In a third rotor zone the fibers are washed out of the rejects after water has been added and in a fourth zone the rejects are dehydrated.

Abstract: An apparatus for treating pulp includes an outer casing, a stationary screen surface mounted in the outer casing. A conduit introduces pulp into the interior of the screen surface. An annular space is defined between the screen surface and the casing for receiving the fraction passing through the screen surface. A feed screw is rotatably mounted in the interior of the screen surface. The feed screw extends vertically or is to some extent inclined relative to the vertical direction. The feed screw includes a shaft and pulp conveying blades. The periphery of the feed screw is provided with a nozzle conduit extending substantially parallel to the shaft and located close to the screen surface for spraying washing liquid to the screen surface. The apparatus is especially suitable for screening and/or thickening of fiber suspensions in the wood processing industry.

Abstract: A waste disposer comprises a shredder section for shredding waste material and a water remover section coupled integrally with the shredder section for removing water from the waste material, in which the waste material is shredded with the shredder section and the shredded waste material is carried upward throughout a cylindrical screen member mounted in the water remover section by the rotation of a screw provided in the screen member while its containing water being removed and drained through apertures of the screen member before discharged from the upper end of the screen member. In particular, a projecting reflector of an inverted truncated cone ring-like shape having a downwardly tapered slope arranged on the outer side thereof is mounted to the upper end of the screw for narrowing the upper opening of the screen member.

Abstract: A hydrodynamic device for generating negative pressure excursions in a pulp slurry during fine screening, includes at least one half-foil member disposed on a substantially cylindrical outer surface of a rotor. The rotor is mounted within and co-axial with a substantially cylindrical screen having a circumferentially continuous apertured zone to define an annular screening chamber between the rotor and the screen. The half-foil member is collectively at least axially co-extensive with the apertured zone and has a leading edge which, also collectively, is inclined at a spiral angle relative to the axis of the rotor such that, in one embodiment, during rotation, the leading edge of the half-foil member conducts large particles downwardly through the screening chamber. A selection of hydrodynamic foil configurations is provided in order to adapt to a wide range of pulp types and screening conditions.

Abstract: The invention pertains to a device to separate solid materials from a stream of liquid, particularly from cooling water. In the case of the known devices, difficulties occur in cleaning the filter from fibrous contaminants generally or starting with a certain size. The subject device draws off fibrous as well as coarse grained contaminants equally well.A preferably funnel shaped filter 3 with a suction device 4 running at an angle to the surface line 6 of the funnel filter 3 is arranged in a pipe shaped housing. The inclination creates a force component 19 which transports the coarse grained contaminants to the tip of the filter where they are drawn off by the suction opening 8 of the suction rotor 7. The fibrous contaminants are drawn off by the suction device 4.

Abstract: An agitator suction filter for the filtration of fluids containing solids, is provided with a housing with an inlet opening, a bottom cover, a filter plate lying over the bottom cover, with an agitator arranged to rotate over the filter plate, this agitator being provided with an hydraulic lifting and lowering device and with extraction elements which carry or transport the filter cake to an outlet opening, and with an outlet opening and an outlet line which is provided with a shut-off device. Around the agitator shaft is arranged a drive bush which is connected at the external periphery via a drive element to the drive motor and at the internal periphery fixed against rotation to the agitator shaft, with the drive bush being led through a sealing unit and the agitator shaft mounted by the drive bush and movable axially via the lifting and lowering device.

Abstract: A manually operable water purification system which includes (i) a first container having an open end and an outlet orifice, (ii) a filter operably positioned within the first container for filtering contaminated water placed within the first container as the contaminated water is forced toward the outlet orifice in the first container, (iii) a porous body of biocidally effective material operably positioned within the first container for disinfecting the filtered water as the filtered water is forced toward the outlet orifice in the first container, (iv) a plunger sealably receivable within the first container through the open end for forcing contaminated water retained within the first container through the filter and the porous body of biocidally effective material, and (v) a passageway through the plunger provided with a check valve for abating formation of a vacuum within the first container as the plunger is withdrawn from the first container.

Abstract: A strainer device is disclosed for continuously separating liquids from a solid/liquid mixture, the strainer including a screen receiving said solid/liquid mixture and a container under reduced pressure disposed under the screen to collect the strained liquid. High pressure fluid is used to roll the solids off the screen to insure that the solids do not plug the screen. If recycled water is used, a spring-loaded nozzle is also provided which may be purged. The device may also be used for thickening a solid liquid mixture. Preferably an angled or conical screen is used.

Abstract: In a screen for pressure sorters for fiber suspensions which is of rotationally symmetrical shape in relation to a screen axis and the screen wall of which is provided with screen opening channels connecting the screen inlet side with the screen outlet side and on its inlet and outlet sides with recesses into which the screen opening channels open, in order to improve the throughput capacity of the screen, to simplify its manufacture, to achieve good fatigue strength of the screen and to generate turbulences at the screen inlet side, each of the recesses on the inlet side extends over several screen opening channels and is in the form of a groove extending transversely to the circumferential direction of the screen, a recess is provided for each screen opening channel on the screen outlet side, and the largest width of the recesses on the outlet side is at least as large as the largest width of the grooves on the inlet side.

Abstract: A pressure sorter for a suspension flow includes a cylindrical housing having at least one inlet opening and at least one outlet opening with a defined pressure drop therebetween. A rotationally symmetric screen basket defining an axis is disposed within the housing. The screen basket has a plurality of openings defining a total screen perforation passage area. The axis of the screen basket is positioned offset a distance of 6 to 12% of the diameter of the screen basket. The axis of the screen basket is disposed in a plane which extends through the housing axis and is perpendicular to the housing outlet opening. A rotor and suspension sorting space are disposed centrically within the screen basket. An accepts space is disposed radially outward of the screen basket between the screen basket and the housing.

Abstract: This invention relates to a screen separator for separating metal adsorbent particles from a pulp and includes a screen separator for separating metal adsorbent particles from a pulp including an open topped and closed bottom cylindrical screen for axially vertical location, in use, in a tank containing pulp with the open top of the screen at or adjacent the full pulp surface level in the tank, an impeller which is located in the screen with its axis of rotation vertical, drive means, and a drive shaft connecting the drive means to the impeller with the impeller being adapted to drive pulp in the screen upwardly to a level above the surface level of the full pulp level in the tank when the impeller is rotated in the screen. The invention further extends to a method of separating the particles from the pulp by means of the separator and to a metal recover process which employs the separation method.

Abstract: Devices for screening pulp suspensions are disclosed including a cylindrical screen extending longitudinally within a housing, an inlet for feeding the pulp suspension into the interior of the cylindrical screen, an accept outlet for removing the accept portion of the pulp suspension after it has passed through the cylindrical screen, a reject outlet for removing a reject portion of the pulp suspension at the opposite end of the cylindrical screen with respect to the inlet, and a rotor concentrically positioned for rotation within the cylindrical screen such that an annular screen chamber is created between the rotor and the screen, the rotor including wings extending from its exterior such that the wings have a length circumferentially with respect to the rotor which ranges from about 2:1 to about 6:1 with respect to the distance between the rotor and the screen, and the leading edges of the wings being separated a greater distance from the rotor than the trailing edges of the wings.

Abstract: An apparatus and method for treating fiber suspension is especially applicable for pulp screening in the wood processing industry, particularly for the separation of light particles from fiber suspensions. The apparatus comprises an outer casing with conduits for inlet pulp, accepts, heavier rejects and lighter rejects; a filter cylinder and a rotor, the surface of which is provided with at least one protrusion; and an opening for guiding the light rejects through the surface of the rotor.

Abstract: Disclosed is a vibratory sieve for separation of fibrous materials from materials containing them, the vibratory sieve comprising a sieve body and a mechanism for imparting vibration to the sieve, the sieve body including a screen to be vibrated by the mechanism, the sieve being adapted to convey a mixture of water and the materials containing the fibrous materials onto the screen through meshes of which finer particles and water are passed by the vibration of the screen, leaving the fibrous materials on the screen, the sieve being characterized in that the sieve is provided with an annular member which is movable on the screen surface by the vibration of the screen and whose movement is confined by an inlet member in such a way that the mixture of water and the materials containing the fibrous materials is placed inside the annular member.

Abstract: A device for separating manure into wet and dry phases is disclosed herein. The manure separator includes a cylindrical strainer portion, a jacket disposed around the strainer portion to collect the wet phase, and a rotatable screw conveyor disposed within the strainer portion. The rotatable screw conveyor includes a shaft, and first and second screw thread sections disposed on the shaft and spaced from one another to include a longitudinal, annular zone that is free of obstruction around the entire circumference of the shaft. The longitudinal, annular zone causes a plug of relatively dry manure to form therein, the forming of which exerts back pressure on upstream portions of manure adjacent the first screw thread section enhancing the separation. The second screw thread section removes downstream portions of the plug for discharge of the dry phase from the device.

Abstract: The invention concerns a sorter with at least two screen baskets in a housing unit. The invention is characterized in that with screen basket diameters of at least 600 mm the at least two screen baskets are contained side by side, spaced, in an arrangement such that their longitudinal center axes extend parallel to each other and their end sides or end surfaces are contained each in identical planes extending perpendicularly to the longitudinal center axes of the screen baskets.

Abstract: A scraper filter system, which comprises a screw-formed spiral impeller within a cylindrical filter element, and a scraper in the groove formed along the spiral end of the impeller for engagement with the internal surface of the filter element for scrapingly removing solid components deposited on the surface of the filter element.The scraper is comprised of a plurality of separate arcuate segments each being urged radially in the external direction by a resilient member, and also includes a securing element for preventing movement of each segment in the groove with respect to the spiral edge of the spiral impeller.

Abstract: Screening apparatus for paper making stock comprises a generally cylindrical vertical housing having the interior thereof separated by a cylindrical perforated screening member into a screening chamber and an annular accepts chamber on the inner and outer sides of the screening cylinder respectively. The feed stock enters an inlet chamber below the screening chamber tangentially, and special provision is made for preventing heavy reject particles from circulating around the bottom of the inlet chamber. For this purpose, the inlet chamber is provided at a position spaced circumferentially downstream from the inlet port, with an outlet port into which high specific gravity particles are carried by centrifugal force along with the carrying liquid. A conduit leads from this outlet port back to the inlet chamber in order to maintain a continuous flow through this conduit.

Abstract: A method and apparatus for treating a fiber suspension to thicken or screen it. The suspension is fed to the gap between a filter surface and a counter member, and accepts flow through openings in the filter surface. Rejects continue along the filter surface to a rejects outlet. Relative movement, preferably relative rotation, is effected between the filter surface and counter member. The suspension at the filter surface is coarser and/or of higher solids concentration than the accepts. This coarser suspension is subjected to a force component by a protrusion on the counter member surface that tends to move it away from the filter surface, in a guided manner (between the protrusion and a guide plate). A second protrusion in the form of a backwardly inclined plate forces fresh suspension toward the filter surface to take the place of the suspension just moved away from the surface.

Abstract: The device is the dual functional filter of the slurry, scraping of the filtered cake, compression the scraped cake and discharging the compressed cake, continuously. The device is composed of both the filter part and the cake compression part. While the filter part is positioned upward holding the filtrate room, the slurry chamber and the filter medium in between, the lower cake compression part contains the screw blade attached to the shaft stationed from the top of the filter part to the end of the cake compression part. The filter cake piled on the filter medium during the filtration of the slurry fed under pressure, is scraped by the scraping blades attached to the shaft or, if necessary, peeled off by the pressure flashings of the back wash liquid through the cake on the filter medium. Precipitated cakes from the above is compressed in the compression part by the screw.

Abstract: A coagulation reaction tank comprises a cylindrical tank provided in the central part thereof with a rotary stirring mechanism furnished with stirring vanes and a filtration tank for introducing the liquid from within the cylindrical tank in the form of filtrate and discharging the filtrate out of the cylindrical tank. This coagulation reaction tank is characterized by the fact that the filtration tank provided in the bottom thereof with slits is disposed in the cylindrical tank above the stirring vanes or the cylindrical tank provided in the upper part of the wall thereof with slits and the filtration tank is disposed outside the slits.

Abstract: The self-cleaning filter particularly for high-viscosity pasty fluids has a fixed body having a substantially cylindrical elongated chamber in which a filtration drum is supported and defines a central region, at one end of which there is an inlet for the fluid to be filtered, and an outer annular region, at the other end of which there is a duct for the removal of the filtered fluid; a shaft is axially supported and rotationally actuated in the chamber and has a helical crest the profile whereof is suitable for grazing the inner surface of the drum to remove therefrom the impurities which are present and is suitable for pushing the fluid toward an impurity discharge duct arranged at the other end of the chamber, the constant cleaning of the drum being suitable for keeping constant the pressure drop on the filter.

Abstract: In the inventive method and apparatus for the continuous discharge of water and fine particles from a suspension, particularly fibrous pulp, the pulp or suspension is thickened without forcing the removal of water through a relatively thick, uncontrollably gathered fiber mat. In the method, the suspension to be thickened is fed into a filtering chamber, the suspension is continuously mixed for equalizing consistency differences, the liquid is continuously removed from the suspension through a filter and the thickness of a fiber mat which forms on the filter surface is controlled by subjecting the mat to shear stresses. In a thickening apparatus for practicing this method, at least one of co-operating surfaces--i.e. the filtering surface (8) and its counter-surface (10)--is provided with loosening members (12) for non-mechanically limiting the thickness of a fiber mat forming on the filtering surface and thereby preventing the uncontrolled formation of such a mat on the filtering surface (8).

Abstract: Disclosed is a filter press comprising a substantially cylindrical vessel, a plurality of filter elements disposed in the vessel parallel to one another, and a rotor having a rotor shaft rotatably mounted in the vessel and a plurality of rotor elements fixedly connected to the rotor shaft and extending each between two adjacent filter elements, the surface of the rotor elements being adapted to be forced towards the filter elements for mechanically compressing filter cakes accumulated thereon, wherein the axis of the vessel is disposed in an upright position, the filter elements and rotor elements being formed as cylindrical wall members disposed in concentric relationship to one another with the rotor elements extending into the spaces between adjacent filter elements and being secured to a mounting structure connected to the rotor shaft, while the filter elements are supported on a carrier grid in the vessel.

Abstract: A backwash strainer including a body, a strainer element having an inlet side contained in the body, and a space defined between the body and the strainer element. The body includes an inlet to the strainer element and an outlet from the annular space. A nozzle for directing cleaning fluid against the inlet side of the strainer element for dislodging particulate matter from the inlet side of the strainer element mounts to the body. A backwash arm for collecting the cleaning fluid and dislodging particulate matter mounts to the body. The backwash arm is positioned adjacent to and is in close proximity to the inlet side of the strainer element and the nozzle. The backwash arm has an axially extending slot defined by two spaced members having ends positioned adjacent to the nozzle. The backwash arm and the nozzle together may be moveable about a central axis relative to the strainer element.

Abstract: There is disclosed a garbage disposer which pulverizes kitchen garbage, drys it and discharges only the yield water into a sewage system. This apparatus includes a garbage pulverizing segment and a garbage drying segment, both of which are driven by a common motor. The garbage drying segment includes a screw with a helical blade and a cylindrical screen disposed around the screw. In this garbage drying segment the garbage is compressed and dried as it is pressure-fed by the screw within the screen. The water thus produced flows past the screen and is discharged from the garbage drying segment into the sewage system, while the dried garbage is collected in a bag.

Abstract: Filter apparatus for continuously filtering fluids containing large amounts of particles, including large amounts of ultrafine particles. The filter apparatus includes filter media and a backwash system which continuously removes deposited filtrate from an inlet side of the filter media. The filter apparatus also includes means for at least temporarily retaining filtered fluid in an outlet chamber of the apparatus at a location immediately proximate an outlet side of the filter media, such that backwashing of the filter means occurs continuously and instantaneously as filtered fluid passes through the filter means.

Abstract: A continuously and automatically functioning device for the drainage of sludge treated with a flocculent, especially of sewage sludge, comprising a screw conveyor installation with a driven conveyor screw consisting of shaft (16) and helix (17) and a screen wall (18). The screw conveyor installation possesses a first cylindrical area (10) of a large diameter and gap width followed by a conical area (12) for purposes of volume reduction in the throughput direction of the sludge. Connected to the conical area (12) of the screw conveyor installation is at least one pressure area (13) which, with the diameter of the shaft (16) being constant, possesses a decreasing lead of the conveyor helix (17) at the side of the entrance, and in its final area carries a conical piece (49) placed upon the shaft (16).

Abstract: An improved apparatus and process for fractionating pulp suspensions consists of multiple interchangeable modular treating compartments stacked atop one another. Pulp suspension is fractionated in the first compartment, and one of the two resulting fractions flows gravitationally to a second compartment where it is fractionated further. Any of the resulting fractions may be fractionated still further in subsequent compartments as many times as desired. The treating compartments are interchangeable, so removal, addition, or replacement of compartments is relatively easy and quick. Fractionation in each compartment is carried out through centrifugal force.

Abstract: Slimy liquids, such as slimy manure, are passed through a press screw separator to separate the solids. Vibrations are introduced into the slimy liquid for reducing its viscosity to enable the liquid to more readily gravitate through a screen basket of the separator.

Abstract: A system for mechanically and biologically decomposing a garbage discharged from a house, a restaurant or the like at high operational efficiency is disclosed. The system includes a disposer for disintegrating the garbage into a large number of pieces, a solid/liquid separator for separating water from the disintegrated garbage and a garbage decomposing vessel for biologically dissolving the solid disintegrated garbage from which water has been substantially separated in the solid/liquid separator. To promote biological decomposition of the solid disintegrated garbage in the garbage decomposing vessel, pulverized wood is normally used instead of soil as a raw material for forming a decomposing bacillus growing bed in the garbage decomposing vessel. Prior to practical use, the pulverized wood is thermally processed.

Abstract: Apparatus for separating liquids and solids, comprising, separator screen means for receiving and separating the solids and liquids, conveyor means for feeding the separated solids upwardly from the separator screen means, and compactor means for compacting the solids, the conveyor means comprising a first conveyor extending at a first upward inclination through the separator screen means and a second conveyor extending further upwardly and at a greater inclination than the first conveyor means.

Abstract: The invention relates to a straining apparatus for the separating of solid-liquid mixtures with a downwardly tapering straining basket, the basket inside wall of which has an inclination (.alpha.) increasing from top to bottom, the charging of material to be strained being carried out approximately tangentially at the upper end of the straining basket and the material to be strained flowing downwards helically with radii becoming narrower, the straining basket wall forming at least one helical, inwardly open channel, which is bounded at top and bottom by helical side walls, between which the channel base having straining openings is arranged, the radius of which base decreases from top to bottom and which is inclined with respect to the vertical axis by the angle (.alpha.) in such a way that, in feeding, the inclination is at first small and then increases constantly.

Abstract: A water purification system including both a filter and a body of biocidally active material for microbiologically purifying biologically contaminated water. The system provides for the production of microbiologically purified water during both upstroke and downstroke of the plunger and includes a brush which can be reciprocated within the system for cleaning the filter.

Abstract: Apparatus for continuously removing from the mother liquor the crystals contained in a suspension of crystals in the mother liquor and for washing the crystals with a washing liquid, comprising a closed cylindrical chamber, feed devices for the suspension of crystals, discharge devices for removing the disintegrated crystal bed, feed devices for washing liquid, filter devices in the form of a flat ring for extracting mother liquor from the suspension supplied, while retaining crystals, transport devices in the form of rotating blades which are fitted in the cylindrical chamber above the filter devices and stator blades above the rotating blades being able to move backwards and forwards over a certain stroke in the axial direction between the filter devices and the stator blades fitted at a distance above the filter devices.

Abstract: A self-cleaning filter comprises a filter element and a housing. A cleaning unit, movable with respect to the filter element, removes filtered-out solids from the upstream face of the filter element. A movable cleaning element is engagable with the filter element. Indexing structure removes the cleaning element from the filter element for removing accumulated solids from the cleaning element while a second cleaning element engages the filter element for cleaning same in substitution for the first cleaning element.

Abstract: An apparatus for cleansing water including a fluid driven cleaner is disclosed herein.

Abstract: The invention relates to a device for the removal of particles and/or screenings from a liquid running in a laundry. A screen with openings in the shape of a cylinder jacket reaches into the laundry and is tilted upwards. The screen is partly immersed in the liquid, and parallel haulage track for the material is provided. The track is located spaced from the screen, and has the form of a screw conveyor with a housing, a shaft and a conveyor helix. The conveyor helix moves alongside the screen and picks up the material and transports it upwards. The openings with their lengthwise direction are inclined relative to the axis of the cylindrical jacket-shaped screen so that they are situated approximately parallel to the effective direction of the total force exerted on the material by the conveyor helix.

Abstract: A rotor is disposed concentrically within a cylindrical screen. The rotor carries a plurality of blades in close proximity to the screen to produce hydrodynamic pulses opposing fluid flow to clear the screen. Each blade includes a first portion affixed to the rotor, this first portion including an inclined face and a substantially raidally extending face. A second portion of the blade is removably affixed to the radially extending face of the first portion. The removable second portion extends radially beyond the first portion. After the removable portion has become worn from extended use, it can be removed and replaced with a new second portion. In a preferred embodiment, the thickness of the second portion of the blade is equal to or greater than the diameter of holes in the screen. It is also preferred that the length of the second blade portion extending beyond the first portion be greater than the diameter of holes in the screen.

Abstract: A coagulation reaction tank comprises a cylindrical tank provided in the central part thereof with a rotary stirring mechanism furnished with stirring vanes and a filtration tank for introducing the liquid from within the cylindrical tank in the form of filtrate and discharging the filtrate out of the cylindrical tank. This coagulation reaction tank is characterized by the fact that the filtration tank provided in the bottom thereof with slits is disposed in the cylindrical tank above the stirring vanes or the cylindrical tank provided in the upper part of the wall thereof with slits and the filtration tank is disposed outside the slits.

Abstract: Screen cylinders, and methods of making the same for use in removing contaminant particles from papermaking stock, have a seamless cylinder body and the openings or slots therethrough are formed by directing a focused laser beam at an outer surface while focusing the beam intermediate the outer an dinner surfaces to form an opening or slot with tapered walls. Wear bars may be applied to the inside surface as a bead of weld material. The seamless cylindrical body is formed by centrifugal casting or by cold roller extrusion.