Abstract: A doctor blade assembly has a doctor blade supported in a blade holder. The blade has a projecting front edge adapted to be placed in contact with a moving surface to be doctored, and a rear edge adapted to be received in the blade holder. The blade is preloaded in a manner such that tensile stresses are induced in the front edge thereof. The level of such tensile stresses is below the yield strength of the blade material, yet high enough to prevent compressive stresses from developing at the blade front edge as a result of heat being generated by frictional contact between the blade and the moving surface being doctored.

Abstract: Drill cuttings, and similar slurries or mixtures oily solid particles, are treated by a dryer apparatus which vaporizes the liquid and discharges relatively large solid particles for disposal. Vapor and entrained solid fines are conveyed from the dryer to a condenser and then to a rotary drum vacuum filter having a precoated filter media disposed thereon. The solid fines are filtered by the filter media comprising diatomaceous earth or perlite and the clarified condensed liquid is conveyed to separator means for separating oil, water and any other liquids present. The filter media stripped from the filter and contaminated with entrapped solid fines is conveyed through the dryer means and disposed with the solids particles being discharged from the dryer.

Abstract: An arrangement for scraping the filtered solids build-up from the surface of a drum filter is disclosed, in which a scraper is mounted with an edge against the surface so that rotation of the drum will accomplish scraping of the surface. Clutching engagement with a rotary drive member is produced by a predetermined extent of axial shifting of the drum against the resistance of a spring bias force. The drum is also arranged to be subjected to an axial pressure force developed by flow through the filter so that clutching engagement is automatically produced upon build-up of solids to a predetermined extent to cause a level of pressure force to be developed to produce a consequent axial shifting sufficient to produce clutching engagement and rotation of the drum. A drag out conveyor moving through the tank engages a rotary sprocket which comprises the rotary drive member, and the scraper edge and drum are positioned to directly deposit the scraped solids on the conveyer to be removed from the tank.

Abstract: A dewatering method and apparatus is disclosed which uses a ramp at one end of a perforate conveyor in which the incline of the ramp may be adjusted while the dewatering operation is taking place. The ramp receives material to be further dewatered after the material has moved along the length of the perforate conveyor. The ramp causes the material to roll back upon itself as the material tends to move up the ramp, which rolling back action enhances dewatering. An actuator is coupled with said ramp for effecting movement of said ramp with respect to the conveyor to adjust the incline of the ramp with respect to the upper surface of the conveyor. In this way, the operator may readily optimize the rolling back action of the material to be dewatered to, in turn, thereby provide optimum dewatering. The ramp is also capable of being completely lifted out of the flow of material to be dewatered while the apparatus is in operation and while the dewatering process is being carried out.

Abstract: A chicane system is provided in a belt filter press in a gravity drainage zone. The gravity drainage zone includes a movable filter belt, an inlet for distributing a suspension on the filter belt and an outlet for discharging separated liquid and solid components of the suspension. A support rod is mounted over the filter belt and has a longitudinal axis generally perpendicular to the filter belt movement. A plurality of flow turners depend from the support rod and engage the filter belt to prevent clogging of the filter belt by the suspension solid component. Each flow turner includes a plow portion extending into the suspension and engaging the filter belt and a leaf spring portion fixed at one end to the support rod and at an opposite end to the plow portion. Each leaf spring portion is stressed to bias and force its plow portion against the filter belt.

Abstract: A gravity liquid filtration apparatus with increased filtering efficiency includes a frame; a pool-forming assembly mounted in the frame, the pool-forming assembly including two spaced-apart, rotatable containment discs and a discharge element mounted between the two containment discs; a filter medium supply roll; a filter medium carrier assembly for pressing an elongated filter medium supplied by the filter medium supply roll against the peripheries of the two containment discs along corresponding bottom arcs thereof, this filter medium carrier assembly being intermittently operable to move new filter medium against the two rotatable containment discs; and a liquid input element for supplying liquid influent between the two containment discs and downwardly onto a downwardly sloped portion of the filter medium.

Abstract: A filtering device has a one-way filter belt guided by an endless screen support belt in the filtration area through at least 120 degrees on an arcuate path for the formation of a deep liquid inlet area. The supply of liquid occurs in the central portion of this arcuate path. Sludge bars coming to rest on the filter belt prevent sludge accumulations in the liquid inlet area.

Abstract: Pulp sheet take-off apparatus which allows removal of drum valve parts from existing high vacuum rotary drum filters and significantly increases the production capability of existing and newly designed high vacuum rotary drum filters includes an enclosed take-off chamber that is mounted immediately adjacent and parallel to the face of the filter drum on the descending side thereof, the chamber being connected by piping to the filter drum barometric leg or other subatmospheric pressure source as a means of maintaining subatmospheric pressure in the chamber equal to or less than the internal pressure of the filter drum.

Abstract: A manure separator arrangement is described including a flume and chain conveyor arrangement by which initially received slurry of liquids and solids is directed over a perforated flume floor. Liquid is allowed to drain through perforations in the floor as the slurry is moved along a pair of troughs formed along the flume. The entire flume is inclined so the liquids received from the perforated flume floor will drain downwardly away from the solids being carried along by the drag conveyor. Solids leaving a discharge end of the flume may lose approximately 80% of the liquid previously contained in the slurry or mixture. The manure discharged from the flume may be received by a separator press roll mechanism by which remaining moisture can be separated. The separator includes a rotated perforated drum and an oppositely rotated press roll. The press roll is yieldably urged against the rotating surface of the drum and is simultaneously rotated to press or squeeze liquid from the solids.

Abstract: A filter unit is provided for separating solids from a liquid including a receiving tank and a vacuum chamber located beneath the tank and separated therefrom by a perforate septum. A closed loop filter media is trained about the tank and a length thereof is disposed beneath a flight conveyor assembly including chains which overlie the side margins and flights which engage ridges provided in the filter media. A filter media cleaning arrangement is provided at one end of the tank for removing solids from the filter media and transporting the solids for disposal.

Abstract: A device for recovering oil floating on the surface of water comprising a framework (50) and a number of discs (51) rotatably mounted thereon. The framework is supported on floats (58,59) with the discs partly immersed in the water, and each disc is associated with a scraper (57) and chute (54) so that oil removed from the disc is deposited into a collection tray (52) from which it can be removed via line (53). Each disc (51) carries at least one axially directed concentric ring (4,5) which presents an inwardly directed surface (7,8). Each disc may carry a plurality of rings of the same or different axial depths.

Abstract: Rotary vacuum filter for filtering a suspension of, for example, yeast or some other plant cell material, comprising a drum (1), a trough (3) for the suspension positioned under the drum and a doctor knife (5) for removing the filter cake which is produced. The doctor knife is attached to or adjacent to one of the upper edges (6) of the trough (3).According to the invention the trough (3) can be revolved around the geometric axis (10) of the drum (1), whereby the immersion angle (.alpha.) is infinitely adjustable, and the doctor knife (5) can be moved towards and away from the center of the drum (1).

Abstract: Disclosed is a plow assembly adapted for use with an endless conveyor type filtering device. The assembly comprises an elongated support member and at least one plow depending therefrom. The plow comprises a shaft affixed to the support member, a plow body having a central bore through which the shaft partially extends, the body being capable of rotary movement on the shaft, and a stop retaining the plow body on the shaft.

Abstract: Disclosed is a filtering device comprising an endless perforate conveyor belt adapted to carry a liquid-containing material and extract liquid from the material through the belt, and a plow assembly for disrupting the material carried by the belt. The plow assembly comprises a generally horizontally positioned cross-member extending across the width of the belt, the cross-member supporting at least one plow such that the plow is capable of contacting the material carried by the belt, the cross-member is mounted adjacent its ends on slide means that enable the cross-member to be raised and lowered with respect to the perforate belt. The device further includes selectively actuatable member for raising and lowering the cross-member with respect to the belt to thereby move the plows into and out of material contacting position.

Abstract: Apparatus particularly useful for the removal of iron particles and other magnetic solids from printing ink. Included is a casing (22) through which flows a liquid to be clarified. A plurality of straight bar magnets (M), mounted to the inside surface of a tubular sheath (50), are magnetically attached to the outer surface of the casing for creating magnetic fields within the casing. The magnetic solids contained in the liquid are magnetically attracted to the inside surface of the casing and so are separated from the liquid. The detachment of the magnets from the casing causes the separated solids to settle to the bottom of the casing for easy discharge through a drain port (38) formed therein. A cartridge filter (28) is provided centrally within the casing for the separation of nonmagnetic solids from the liquid.

Abstract: A portable, self-contained skimming apparatus having a rotatable drive wheel and a rotatable idler star wheel disposed in a spaced apart relationship. An endless belt is extended over the rotatable drive wheel and the rotatable idler star wheel, a portion of the endless belt descends downwardly into the liquid to be skimmed. One or more scraping devices are provided between the rotatable idler wheel and the rotatable drive wheel for removing fluid from the endless belt. A pressure roller is provided to bias a portion of the endless belt into engagement with the rotatable drive wheel so that the rotatable drive wheel may drive the endless belt. A collector is provided below the one or more scraping devices so as to collect fluid removed from the endless belt.

Abstract: A self-relieving bar screen, for intercepting debris moved by a liquid through a conduit into a space having a greater lateral dimension, includes a series of bars disposed in spaced lateral relation in a position normally opposite the discharge end of the conduit, with a lower, generally forwardly extending portion of each bar below the lower edge of the conduit and a generally upwardly portion extending up to opposite the upper edge of the conduit. The series of bars extend laterally past each side of the conduit but for a distance less than the width of the wall at which the conduit terminates. The side spaces thus provided permit liquid to flow to each side of the bars, in the event debris accumulates on the bars and may otherwise tend to obstruct the flow of liquid. The bar screen may be moved upwardly periodically with the debris collected thereby and emptied into a receptacle or the like, through a pivotal rake which is specially positioned.

Abstract: An apparatus especially suited for cleaning impurities from plastic screen belts of paper making machines is shown as having a first drum type brush operatively engaging, through its bristles, the screen belt. The bristles are made of material having a high affinity to such impurities. A second drum type brush, of which its bristles are made of material having a low affinity for such impurities, spaced from the screen belt, is in operative engagement with the first drum type brush as to remove the impurities, which the first drum type brush carries because of removal thereof from the screen belt, from the first drum type brush and deposit such impurities into a receiving area.

Abstract: A method and device for filtering a suspension (14), for example of yeast or other plant cell material, on a rotary vacuum filter (10), beneath which a trough (4) containing the suspension (14) is located. In order to improve the balance between dipping zone and drying zone, according to the invention a take-off knife (1) for taking off the filter cake (8) resulting from the filtering is attached to the trough (4). The level of the suspension (14) is maintained constant, and the trough (4) is moved by means of a feeding device (7) to the center of the drum (12) of the vacuum filter (10) while the drum is rotating.

Abstract: A filtration/separation apparatus in which a filter cloth is arranged to travel and face a rotor so that a partitioned space chamber defined by the cloth and rotor is gradually narrowed in accordance with the rotation of the rotor. The space chamber defined is partitioned by vanes provided on the rotor, so that the positional relations in contact between the tip ends of the vanes and the filter cloth are maintained desirable with a high accuracy.

Abstract: A wire machine, especially for washing stock suspensions, contains one or a number of dewatering cylinders about which there is trained an endless wire or filter band. There is provided at least one stock infeed device which infeeds a substantially flat jet of the suspension which is to be dewatered into a substantially wedge-shaped space or throat located between the wire band and the dewatering cylinder. The dewatering cylinder has a longitudinal axis which is essentially vertically arranged. There are possible different arrangements of the dewatering cylinder or cylinders, the stock infeed devices and material removal devices for removing from the rotatable dewatering cylinder solid constituents or the like contained in the stock suspension. Also there are possible different arrangements and uses of guide rolls for guiding the wire or wire band.

Abstract: A liquid purification and separator system is adapted to be floated upon a body of water and to be moved from location to location and has a liquid collection section for collecting water connected by a water line to a floating purification unit. The floating purification unit includes at least one aeration tower having a dispersing nozzle for spraying the collected liquids in a fine spray onto the tower. The liquids collect on the towers and trickle down to moving filter belts which allows the water to pass through and back into the body of water. This process enables the system to collect solid particles such as hydrocarbons, oil, coal, mined minerals and particles from sewer plants and industrial plants. The rotating belts are cleaned at one end to remove the collected pollutants into a collection container. The system also acts to cool the water as it passes through the aerator.

Abstract: A filtering apparatus is used to continuously separate a large quantity of a substance such as a slurry, sludge or other suspension into a liquid component and a solid component in such a manner that the separated solid component is obtained as a cake in a semi-dried condition, and comprises a rotary drum including a perforated cylindrical member and a filter cloth provided on the outer peripheral surface. The drum is supported for rotation so that a portion thereof is immersed into the substance to be filtered. The pressure within the drum is reduced by a vacuum pump so that the liquid component of the substance is drawn into the drum through the portion thereof is immersed into the substance while the solid component of the substance is accumulated on the filter cloth of the rotating drum and is held as a cake thereon. The cake is continuously removed by a doctor blade in the portion of the drum which is exposed to the atmosphere.

Abstract: This invention relates to an apparatus for restratifying the filter cake in the strainer zone of strainer belt presses, in particular double strainer sludge dehydrating equipment, comprising one or more monofilament or multifilament cables (9) tensioned transversely or obliquely to the direction of advance of the strainer across the width of the strainer belt (6) and the filter cake (7).

Abstract: The disclosure relates to the filtering of liquids charged with solid particles, with a filtration device of the kind comprising a rotary drum 1, a first continuous filter cloth 12 enflanking a first angular sector of the drum and separated from the drum in a second angular sector. A series of cellular elements 7 enflank the first sector and comprise a cell 9 whose bottom has grooves 11 in communication with a discharge orifice for clear liquid. Lateral injection means 35 for injecting a charged liquid which is to be filtered abreast of each cell. There is also a second continuous filter cloth 13 also enflanking the first sector and separated from the drum 1 in the said second angular sector. The outer surface of the drum has, abreast of each of the cells, a series of grooves 34 in communication with an orifice for recovery of clear liquid.

Abstract: A sludge thickening apparatus for dosing sludge with a cationic polyelectrolyte, allowing time for the development of a floc structure, placing the dosed sludge onto a surface through which liquid may drain freely by gravity in such a manner that the floc structure is retained, and removing the thickened sludge from said structure.

Abstract: A magnetic belt conveyor type magnetic particle separator comprises a storage tank for storing cutting oil containing magnetic particles, an endless belt conveyor extending sidewise from the storage tank in an upwardly inclined direction, and a magnet disposed beneath the forward run of the belt conveyor to extend in the direction of running thereof. Magnetic particles contained in the cutting oil are attracted by the forces of the magnet to the upper surface of the forward run of the belt conveyor to be conveyed up to the forward run end thereof and separated therefrom at the forward run end for being discharged.

Abstract: Apparatus for thickening sludge comprising a driven foraminous belt (10) having a conveying surface arranged at least substantially horizontally, a chute (14) for feeding a matt of sludge onto the belt (10) at one end of the conveying run, and a plurality of parallel flexible strips (21) of material attached at one end to the output end of the chute (14) and allowed to rest freely upon the belt (10) at the other end, whereby the sludge passes onto the belt in one or more strips whose width is substantially less than that of the belt, thus to leave one or more zones of the belt free of sludge to permit drainage of water therefrom through the belt, there being a plurality of deflecting members (22) disposed downstream of the output ends of the strips (21) and adapted to deflect a portion of each strip of sludge onto the next adjacent part of the belt left free of sludge thus to produce a matt thereof of substantially uniform thickness extending across the belt.

Abstract: Apparatus to remove dust, fibers, lint or other undesirable particles from air. Air ladened with dust, lint or other undesirable matter is drawn into a filtering housing to contact the surface of a rotatable screen-covered drum. The air passes through the drum while the particles remain on the drum surface. The air passes from a higher pressure area exterior of the drum into a lower pressure area within the center of the drum and is conveyed away. The particles are retained on the exterior surface of the drum which is covered by the fine mesh screen. The particles, which form a bat, are then separated from the rotating drum surface by being moved into contact with a smooth compressor roll cooperating with a flighted doffing to lift away the bat from the drum and drop it to a collection zone. Fixed rubber seals are located to contact the rotating edges of the drum.

Abstract: A hinged doctor blade is biased to its operative position respecting the belt of a belt conveyor. Shoes at each end of the blade ride on the belt ahead of the blade respecting belt travel and are positioned and connected to the blade so that the forward clips of the belt joint lifts the blade upon the first approach of either end of the joint and the other end is effective to hold the doctor blade in its raised position until the forward portion of the seam is beneath the blade and the blade can safely ride over the seam and then resume its operative position respecting the filter belt. Adjustment means are provided so that the positions of the shoes relative to the doctor blade may be set as required by the length of the seam having reference to the direction of belt travel.

Abstract: A filter for removing solids from a liquid of the type wherein a rotatable basket or drum has media inside straining from inside out. A power operated conveyor is mounted in the drum above the axis of rotation for receiving and positively removing solids. Thus, a liquid level is possible above the axis of rotation but below the conveyor so that a large filter area is in contact with the liquid while not interfering with the operation of the conveyor. A retractable scoop is provided for positively delivering the solids to the conveyor with an alternate sealing arrangement. A discharge ramp is carried adjacent an end of a baffle which extends above a liquid inlet upwardly toward the conveyor and is spaced from an inner wall of the drum to collect solids therebetween and accommodate the scoop for their removal. An improved means for equalizing the distribution of the liquid within the drum is also provided.

Abstract: Band filter devices for continuously dewatering a suspension, such as sewage sludge comprising an upper filter band stretched between deflection rolls, the upper strand of which forms a filter zone, and a further filter band which together with the lower part or strand of the first band forms a compressing zone. The filter band is stepped at least once in a Z-shaped manner in the filter zone by providing a further deflection roll which is positioned lower than and downstream of the first deflection roll but in a position counter to the direction of transport, and such that between two filter zones there is a zone where the sludge cake is transferred to another part of the band and rearranged. Above the upper strand or part is at least one ram or beam which lies transverse to the direction of transport and the ram can be pressed into the sludge cake to produce transverse grooves or channels in the sludge cake.

Abstract: Doctor blade cleaning apparatus for the removal of solids accumulating thereon which includes a cleaning blade movable through an arcuate path and activating devices for moving the cleaning blade at least over the surface of the doctor blade and to a position away from the doctor blade for the discharge of solids removed therefrom.

Abstract: Magnetic filter apparatus with a plurality of magnetic bars, carried on endless conveyor chains through a container for contaminated liquid, having for the cleaning of said magnetic bars a device which is positioned outside the liquid above the fluid container. The cleaning device has at least two chain-driven dirt scrapers with wiping formations which enclose from above and below one or more magnetic bars during the cleaning process. In order that the dirt removed during the scraping operation should not fall onto the driving chains, the chain drive is positioned above and to the side of the liquid container. The chain drive moves a steered carriage which bears scraping rods which can be opened and closed pincer-fashion. The dirt scrapers are positioned on the front ends of these rods which project over the container area. The cleaning process takes place with pincers closed, the return stroke with pincers open.

Abstract: A separation drum for suction recovery at high concentration of fine particles, such as algae, removed from dilute liquid medium by a belt filter has a thin, perforated wall rotatably mounted on a substantially horizontal, cantilevered beam fixed on a base. A pair of rings or hubs engage the separation drum at opposite ends. One ring is rotatably supported on rollers mounted on the beam, and the other ring is rotatably supported on a bearing mounted on a shaft extending from the beam to a removable end pedestal on the base. A number of interior rollers, also supported from the beam, engage the interior surface of the drum. A conduction or suction box is disposed on the beam or built into the beam in juxtaposition with the upper, interior portion of the separation drum to receive and carry away material passing through the perforated drum wall. A main belt extends around the exterior of the separation drum wall and around a filtration drum within a liquid medium containing algae.

Abstract: A screen device for separating undesirable impurities from a pulp suspension is provided with at least one continuous circular screen slot between a first chamber into which the suspension is conducted and from which undesirable material is removed and a second chamber from which the screen pulp suspension is transported. The slot is formed by two walls which are stationary in relation to each other and a cleaning device such as a doctor or knife bears against the screen slot, the cleaning device and slot being movable in relation to each other for continuous cleaning of the screen slot.

Abstract: An apparatus and method for separating entrained particulate matter from a fluid wherein particulate matter is collected in an overlying porous layer on an upstream side of a rotatable, fluid-permeable filter in a first chamber, and rotatably conveyed into a second chamber and used as an additional filtering medium. The filter comprises a cylindrical drum having a filter surface thereon and is rotatably mounted in an enclosed housing having a fluid inlet and a fluid outlet. Fluid pumping means operatively communicate with the housing for inducing a flow of fluid into the housing through the inlet and out of the housing through the outlet. Chamber means are disposed within the housing and sealingly cooperate therewith and with the cylindrical drum and define a first chamber fluidly communicating with the inlet and a predetermined portion of the cylindrical drum on the upstream and downstream sides thereof.

Abstract: A filter for removing solids from a liquid of the type wherein a rotatable basket or drum has media inside straining from inside out. A power operated conveyor is mounted in the drum above the axis of rotation for receiving and positively removing solids. Thus, a liquid level is possible above the axis of rotation but below the conveyor so that a large filter area is in contact with the liquid while not interfering with the operation of the conveyor. A retractable scoop is provided for positively delivering the solids to the conveyor.

Abstract: Magnetic filter apparatus includes a liquid container, an inlet for liquid contaminated by magnetizable material, an outlet for purified liquid and a wall of magnetic bars disposed between the inlet and the outlet and having gaps therebetween for the passage of liquid. The magnetic bars are carried by an endless conveyor. An improved cleaning device is provided for cleaning the magnetic bars above the level of the liquid outlet. The improved cleaning device has wiper blades engageable with the magnetic bars. The wiper blades are mounted on endless conveyors arranged one to each side of the wall of magnetic bars. These endless conveyors are inclined obliquely across the wall of magnetic bars. This disposition of the conveyors permits a continuous or nearly continuous operation of the apparatus by adjustment of the wiper blade conveyors such that their speed component in the direction of travel of the wall of magnetic bars is the same as the speed of travel of the conveyor carrying the wall of magnetic bars.

Abstract: An endless driven belt strainer adapted for use as a porous barrier in a channel containing a flowing liquid, such as a channel supplying raw sewage to a treatment plant. The belt strainer is composed of a number of endless porous wire or plastic screen strips arranged in side-by-side relation and which pass over a driving roller, guide rollers and a tension adjusting roller, all of which rotate in a frame having an upwardly inclined bottom portion which slopes away from the direction of flow of the liquid to be cleansed, and a top portion located above the liquid level and equipped with a cleaning means for removing foreign matter from the belt strainer as it commences its return travel. Means is provided for twisting each porous strip 180.degree.

Abstract: A mechanical strainer having a stack of alternate discs and blades biased together, the discs being slowly driven by a motor and the blades being anchored on the strainer frame, which discs and blades are perforated so that water surrounding the strainer can leak into the perforations of the stack. A passage is formed in the frame communicating with the perforations of the stack, and a tube leading to where the water is desired is coupled to the frame passage. The result is a kind of labyrinth rotary seal having intended leakage.

Abstract: An apparatus is presented for separating loose paper pieces from a bath of caustic soda, such as is ejected from a bottle washing machine including a housing having a reservoir in its upper portion, the reservoir having finely perforated bottom walls sloping toward the center where there is an elongated opening. An elongated helical screw conveyor is provided in the housing spaced below and parallel to the elongated opening with a perforated conveyor sleeve closely surrounding the conveyor on the bottom and sides leaving an open top which communicates with the paper coming down from the upper reservoir. Two cylindrical perforated drums are mounted in the housing on axes parallel to the screw conveyor and on opposite sides of the center of the housing. These drums may be rotated from time to time as set forth. A paper-chopping apparatus is provided at the end of the conveyor which discharges paper outside of the housing.

Abstract: A slide filter device for filtering thermoplastic and other materials which become fluid or stiffen in response to temperature change, having rigid self-supporting slide plate means movable within a housing from an inlet port passageway to an outlet port passageway for supporting and carrying replaceable filter media across the path of fluid flow (i.e.: the "melt stream") of the working material. The outlet port passageway is larger in cross-section than the slide plate means and a seal of stiffened working material is formed in the gap between the slide plate means and the walls of the passageway. Seal material emerges from the outlet port passageway affixed to the slide plate means as the slide plate means is advanced across the melt stream.

Abstract: Method and apparatus for drying waste matter such as sludge accumulated in a sewage treatment facility. The sludge is mixed with flocculating chemicals and thoroughly stirred. The mixture is then allowed to drain for a predetermined time in a porous-bottomed basin. A porous web preferably of braided wire which is movable across the basin floor carries the drained sludge to a pressing facility which squeezes the sludge between a pair of linear squeezing plates. As the web leaves the basin it is joined by a second web capturing the sludge therebetween for delivery to the pressing facility. The sludge may be air-blown in the pressing facility to achieve further dryness.The common guiding roll about which the two webs merge also serves as an end wall for the aforementioned basin.

Abstract: A machine for separating an oil film from a supporting liquid elevates the oil from its original position with an endless belt, and then transfers the oil from the belt to a rotating disc from which it is wiped into a drainage trough. The belt system is driven from the disc, and is constructed as an attachment to a self-contained disc machine capable of functioning without the belt system when the disc can intersect the surface of the liquid. The unit is thus adaptable to installations where the liquid level is far below the rim of the accumulating tank where the machine is mounted, and where there is substantial variation in the liquid level.

Abstract: An improved bar screen is disclosed which has a plurality of ring bars and a plurality of scrapers mounted therebetween which are rockable away from the ring bars. Since base portion of the scrapers is always engaged between the ring bars, the scrapers may be easily reset into their operative position after they have been rotated to their cleaning position away from the ring bars.

Abstract: Apparatus and method are illustrated for removing solids from filter media supported by a backup roll wherein an elongated brush exerts a flicking action on the solids collected by the media during a filtering operation and deposits the solids upon a splash plate where the solids are collected for reclamation. Spray means are provided for directing a backwash of water across the filter media on a side thereof remote from the brush for cleansing the filter media.

Abstract: A segmented cake discharge deflector blade for rotary drum filters. Each segment includes a straight blade mounted on a plurality of spaced apart U-shaped flat steel springs with the free edge of the straight blade extending beyond the closed end of the U. The face of the filter tank is provided with a clamp for receiving the free end of the other leg of each spring. The springs are preselected for proper tension. Complemental elements on the tank wall and springs cooperative with each other provide proper positioning of the free edge of the blade segments relative to the drum face.

Abstract: A segmented endless belt vibrating screen for removing solid particles from a stream of drilling fluid circulated therethrough. The endless belt is mounted on a resiliently mounted vibratory carriage. Rollers driven by a motor carry the belt. The screen is connected to the belt by a plurality of spaced hooks along the screen. A wiper and a washpipe are supplied for removing particulate from the screen.

Abstract: A doctor blade assembly for use with a rotating cylinder includes a doctor blade extending axially adjacent the cylinder outer surface and a blade cleaner extending parallel to and adjacent the doctor blade. The blade cleaner is pivotally supported on the doctor blade assembly and there are cooperating means on the cylinder and blade cleaner support for causing intermittent movement of the blade cleaner in a path along the doctor blade upper surface.