Abstract: A method of rinsing a slurry contained between a pair of converging mesh belts comprising the steps of splitting the slurry into two streams, each stream adjacent one of the converging mesh belts, introducing a stream of rinsing fluid between the two slurry streams, the point of introduction of the rinsing fluid between the two slurry streams is not more than 12 inches before and not more than 72 inches after the slurry streams contact the converging mesh, and creating compressive forces within the pair of mesh belts, which compressive forces continue for a distance of at least 24 inches after introduction of the stream of rinsing fluid.

Abstract: A continuous media filter consisting of an inclined endless belt in contact with a reservior of contaminated slurry materials with provisions for altering the speed of the belt passing through the filtered material and also the angle of inclination of the belt in response to the volumetric flow of the contaminated material. The flow is determined by monitoring the level of the contaminated liquid in the reservoir with a level sensing device which gives an indication of how fast the liquid is passing through the media belt. As a result of the variables which can be adjusted the filter can be used as a high efficiency filter or a selective filtering means. With proper sizing the filter can be efficiently used in processes with variable flow rates without causing the bottleneck common to other filtering devices.

Abstract: A method for thickening a liquid suspension of solid particles, such as papermaking pulp in water, uses a pair of spaced apart rolls and a woven wire or plastic wire belt trained around these rolls. The suspension is supplied at the first roll for centrifugal extraction and is carried by the belt to the second roll for further water extraction and thickening, and is then discharged from the apparatus. In one embodiment, the first roll is formed with an open surface, and the suspension is delivered to the web at least partially by flowing both into and out a roll chamber via the first roll openings, from a headbox in the on-running wedge zone.

Abstract: A dewatering press for a mat of solid material, particularly for dewatering of fiber panels, includes upstream and downstream spaced apart stationary uprights, a press having a lower part and an upper part pressing against the mat of solid material in a pressing position of the press and a plurality of rollers mounted on the stationary uprights and guiding respectively a grate belt and lower and upper sealing belts between the uprights.

Abstract: An apparatus for the apportioning and dispensing of fibrous goods, particularly of sauerkraut, is disclosed. The apparatus for the dispensing of fibrous goods which are first mixed with a liquid ensures a precise maintaining of a certain weight of the goods which are drained by the apparatus. According to the invention, it is suggested to provide sieve walls in the form of travelling sieve belts between which a progressively drained strand of fibrous goods is formed. The strand can then be cut into portions. The new apparatus may be used for the apportioning of sauerkraut.

Abstract: A beltpress controller performs on-line measurements of output sludge cake thickness. A controller takes a product of the measured cake thickness with belt speed, moisture content and belt width to determine a rate of dry solid output per unit time. The calculated rate is compared with a desired rate and the sludge flow rate is adjusted by adjusting the speed of a sludge feed pump to obtain the desired dry solid output rate. In systems which mix polymer with the sludge to increase the dewatering efficiency, the sizing of a mixing orifice through which the sludge and polymer is provided is adjusted to maintain a substantially constant mixing energy. This prevents errors in the streaming current detector which measures the amount of excess polymer in the filtrate and the controller adjusts the speed of a polymer dosing pump accordingly.

Abstract: A method for removing liquid from a mixture of liquid and solid matter wherein the mixture is led over one or more casings by a conveyor belt which is pervious to liquid. In use a sub-atmospheric pressure is generated in the casings during a first period, in which the casing(s) and the conveyor belt are stationary with respect to each other, while at the same time a pressure is exerted on the mixture by one or more rollers. During a period following the first period, a relative movement takes place between the conveyor belt and the casing(s), while during this period no sub-atmospheric pressure is exerted in the casings and no compressive force is exerted on the mixture by the rollers.

Abstract: A self-cleaning vacuum filter, particularly for filtering industrial lubricants and coolants, comprises a tank for the liquid to be filtered containing a filter assembly, the bottom of which communicates with a vacuum chamber connected to a suction device for the liquid. The filter assembly includes a screen and an endless loop of regenerable filter cloth movable in steps over the screen and through a station for the removal of the filtered material, the station extending out of the tank and having a removal device for removing the filtered material from the filter cloth. The removal device includes a roller extending transverse of the filter cloth, substantially in contact therewith, and a motor for rotating the roller at high speed.

Abstract: A first electrode arrangement and a transport element are movable relative to a support. A working space is disposed between the movable elements for advancing moist material along a processing path. As the moist material advances, electrical current is passed through the material between the first electrode arrangement and a second electrode arrangement adjacent the transport element. An acoustic transducer arrangement disposed adjacent the working space simultaneously subjects the moist material to an acoustic field as the material moves along the processing path. The acoustic field is generated by an array of acoustic transducers spaced along part of the processing path.

Abstract: A double screen belt press for dewatering mixtures of fibrous material suspensions has a wedge compression zone comprising rolls and perforated plates supporting generally upper and lower screen belts. For dewatering mixtures of fibrous material suspensions having a high dry solids content, at least one sealed material feed empties into the wedge compression zone with a high pressure. A generally vertically gravity tower with an outlet port is provided to feed material into the entrance of the wedge compression zone above the lower screen belt and in front of the front roll supporting the upper screen belt. The outlet port area of the material feed is sealed on at least the side facing the lower screen belt and optionally on the side facing the upper screen belt and on the other side of the material feed facing away from the wedge compression zone between the material feed and the lower screen belt.

Abstract: A process and apparatus for reducing sludges, especially those sludges containing heavy metals and generated in electroplating, to a solid state where the toxic constituents of the waste are prevented from leaching. The process involves mixing a metallic soap with the sludge and then using low-temperature induction heating to form coacervate bonds that encapsulate the toxic waste particles in a pumice-like matrix. The apparatus allows a small amount of metallic soap to be thoroughly mixed through sludge and a continuous ribbon of the resulting putty-like waste to be fed into a series of microwave drying ovens and evacuation chambers. After the drying and dewatering sequences, the apparatus extrudes a pumice-like solid suitable for disposal in accordance with EPA regulations.

Abstract: In the method and apparatus for filtering industrial processing liquids including feeding unfiltered liquids into a tank, guidably movably supporting and immersing portions of a continuous conveyor screen within the tank, positioning a filter media upon and along the screen with the filter media providing a loop within the tank, a clean liquid reservoir within the loop and an unfiltered liquid reservoir upon its exterior, providing an open top vacuum chamber within the clean liquid reservoir with the conveyor screen sealed over, along and covering the vacuum chamber, and positioning a power-operated tractor chain sludge elevator upon the tank opposite the open top of the vacuum chamber to longitudinally overlie and frictionally engage the outer surface of a return portion of the filter media effecting a positive upward lift movement of adjacent portions of the filter media with accumulated sludge thereon.

Abstract: The press comprises a pair of moving endless filter bands having two parallel lengths sandwiching material to be dehydrated and clamped between two presser plates each of which acts against a corresponding one of the lengths of band via a respective moving endless belt. Each presser plate is associated with at least one endless bearing chain carrying a series of wheels which are free to rotate and which are interposed between the presser plates and the associated endless belt.

Abstract: A self-cleaning vacuum head is disclosed which has the ability to discriminate between particles of different size, or the ability to separate fluids from particulate matter. The invention has two relatively moving surfaces which provide a changing locus of vacuum so that particles drawn against the surfaces are later separated therefrom. An oil spill clean-up system is also disclosed utilizing the self-cleaning vacuum head.

Abstract: A belt press type dehydration device of improved efficiency includes upper and lower pressing belts of dual layer construction. A first mesh member layer is made of Z-shaped interlocked wire members, and to this is fastened the filter sheet layer. The meshed member layer is designed to provide support for the filter sheet layer and to engage sprocket teeth driven by a motor to advance the belts. Since high tensile strength is no longer required of the filter sheet, it can be thinner and coarser than before, leading to increased dehydration efficiency. Also, the number of pressing drums can be reduced due to the increased efficiency. The upper belt mash layer is made of two separate mesh loops attached to each edge of the filter sheet layer. Sprockets adjacent the pressing drums are spaced near the edges of the belts, to reduce or eliminate leakage over the edges during pressing.

Abstract: The invention relates to a device (1) for crushing plant matter, particularly for re-pressing sugar-beet chips. The matter to be pressed is distributed in thin layers of approximately 10 mm thickness on filter cloths (2) and is then subjected in a plurality of superposed plies (3, 4, 5, 6) to a high compressive pressure between a press platen (7) and a press crown (8). A loading device (10) is provided to deposit the matter to be pressed in layers on the filter cloth (2). The press platen (7) and the press crown (8) are essentially level, rectilinear and horizontal. The stack (25, 25') formed by the filter cloth (2) and the matter to be pressed is also fed rectilinearly and horizontally through the press opening (9, 9A) between the press planten (7) and the press crown (8).

Abstract: The present invention relates to a procedure and a device for dewatering slurry and similar substances, in which the slurry is fed into a completely enclosed slurry chamber (2) by a pump (7), and a hydrostatic pressure of adjustable magnitude is produced. The slurry chamber (2) is subsequently isolated from the pump (7), the volume of the slurry chamber (2) is reduced and a mechanical dewatering pressure is generated.

Abstract: An apparatus is disclosed for removing ash from repulped wastepaper which contains ash together with cellulosic fibers. The apparatus includes a frame and a plurality of rolls which are rotatably secured to the frame, such that the axes of rotation of the rolls are spaced and parallel to each other. The plurality of rolls include an upstream roll and a downstream roll having a cylindrical outer surface. A porous belt is supported by and extends around the plurality of rolls to define an endless loop. The belt moves between the upstream and downstream rolls for defining a screening portion. A headbox is disposed within the endless loop, and adjacent to the screening portion for ejecting the repulped wastepaper through the screening portion. A drainage device is disposed on the opposite side of the screening portion relative to the headbox for receiving ash passing through the screening portion.

Abstract: A high speed stock thickener has a foraminous endless wire. The stock thickener is of the type in which an open mesh endless wire is trained over a pair of rolls and paper stock to be thickened is applied between the wire and the rolls and is carried on an inside surface of the wire for dewatering, particularly at the regions where the stock is carried between the wire and a roll. The improved wire is formed with a width greater than that of the rolls with a marginal edge of the wire extending beyond the face of the rolls. A guide belt is attached at each of the marginal edges of the wire and runs with a side wall in engagement with the end of the adjacent roll. The guide belts are attached to the wire by an adhesive bond between the backs of the belts and the adjacent wire surfaces, and by a continous thread which is sewn through each belt from the bottom of the belt and through the back thereof and into the wire.

Abstract: A belt filter press comprising two co-operating, endless belts, particularly for manure, which according to the invention takes steps to enable liquid and solid substance to be better separated from each other. The pressure between the endless belts is increased, the longitudinal edges are sufficiently sealed and substance that is still too moist is subjected repeatedly to compression since it remains stuck to the upper endless belt and is carried to the intake of the belts.

Abstract: In apparatus for thickening a suspension of pulp material which includes an endless foraminous belt wrapping two spaced horizontally supported rolls, a special doctor mechanism is provided for transferring thickened pulp from the bare surface of the second roll into a trough mounted in the space bounded by the two rolls and the upper and lower runs of the belt. More specifically, the doctor mechanism includes a rigid doctor blade mounted with its working edge in close but spaced relation with the bare surface of the roll to remove pulp therefrom without contact with the roll surface. Provision is also made for periodically oscillating the blade about a horizontal axis to move its working edge away from and back to its closely spaced working relation with the roll.

Abstract: An apparatus for filtering industrial process liquids is disclosed herein. The apparatus includes a tank, a continuous conveyor screen mounted within the tank, a partition spanning the tank walls and having an elongated aperture therethrough, and media sealing means upon and surrounding the aperture. One side of the conveyor screen overlies the tank and is guidably retained for sealing engagment with the sealing means, and the other side of the conveyor screen operatively engages a continuous sheet of filter media. The conveyor screen and filter media span the aperture providing upon the underside of the partition an enclosed filtered liquid reservoir and upon its other side an open unfiltered reservoir. An elongated open-top vacuum chamber is supported within the filtered liquid reservoir with its peripheral edge in sealing registry with the conveyor screen and having a first outlet for delivering filtered liquid to a process area.

Abstract: A filter for filtering liquids is proposed, in which the filter fabric along an arcuate path is mounted on a bearing element concomitantly rotating with the filter fabric. The bearing element is constituted by a rotatably mounted ring, which is mounted on a bearing inner ring connected to a wall of the filter. The seal between the bearing inner ring and the rotatably mounted ring is provided by an O-ring, which forms a radial or axial seal. In the case of the present filter, the inlet port is located in the rigid wall and its position and shape can be adapted to the particular requirements.

Abstract: A guide means for individually adjusting each of the carrier belts of a multi-belt horizontal belt filter is disclosed. The guide means includes a plurality of support rollers, each having a rotatable roller segment which is held in rolling contact with a respective carrier belt. The remaining structure of the support roller is held out of contact with the remaining carrier belts. Each support roller is made adjustable as to orientation and location whereby a selectively directioned force may be applied to a given carrier belt to adjust its direction of travel.

Abstract: A mechanical sludge dewatering system including a plurality of first rollers, one or more second rollers and a liquid-permeable, endless belt passing between the first and second rollers from an inlet to an outlet end. At least some of the rollers of the first set are tapered from their ends to a smaller diameter at the center, the amount of taper decreasing from the roller at the inlet end to that at the outlet end, the opposing one or more second rollers being of constant diameter. The sludge carried on the belt passes through the cavities defined by the tapered first rollers and the cylindrical second roller(s), which decrease in cross section from the inlet to the outlet end, thereby squeezing water from the sludge. The first rollers each have grooves around their periphery adjacent each end, and the belt carries a protruding strip along each side, the belt being laterally constrained by the strips riding in the grooves.

Abstract: A twin belt filter press system has an amendment such as sawdust, fed to a sludge or slurry being dewatered after the sludge/slurry has been initially dewatered in a gravity drain section to form a cake on a first porous belt. The amendment cascades into the partially dewatered cake off the first belt, allowing mixing of the cake and amendment in an essentially belt-wide drop zone so that the amendment partially and quickly desorbs the cake before the cake and amendment mixture progresses into a nip formed by the first belt and a porous second belt. The mixture subsequently is carried in a position between the belts for pressing to remove moisture from both the cake and amendment. In one embodiment a shear-minimizing mixer is arranged in the amendment drop zone to additionally mix the amendment with the cake.

Abstract: An apparatus for filtering industrial processing liquids is disclosed which includes a tank, a continuous conveyor screen positioned in and defining a loop in the tank, and a continuous filter media placed on an outer surface of the conveyor. The apparatus includes a power operated tractor chain sludge elevator guidably mounted within the tank extending along and frictionally engaging an outer surface return portion of the filter media for effecting a positive upward lift movement of adjacent portions of the filter media with accumulated sludge thereon. The apparatus may also include an apertured horizontal partition in the tank, the filter media sealed over the aperture defining a filtered liquid reservoir chamber positioned below the partition and an unfiltered liquid chamber above the partition, an opened-top vacuum chamber sealed to the filter media and immersed within the filtered liquid chamber positioned within the aperture so as to form a peripheral channel between the aperture and vacuum chamber.

Abstract: A watertight belt-drive conveyor system for transporting semi-liquid sludge from semitrailers is disclosed. The conveyor belt is looped around two pulleys located at either end of the trailer and transported by a main drive drum located below the trailer. Adequate frictional pressure is maintained between drum and conveyor belt for driving the conveyor belt under load by a system of four pulleys which force a full-width V-belt into close frictional contact with the outer surface of that portion of the conveyor belt which is wrapped around the main drive drum.

Abstract: A press-filter including a chassis, two endless filtering webs, guide rollers defining paths for the two webs, the paths of which are partially contiguous, and several squeezing rollers located on either side of the filtering webs along their contiguous path portions and squeezing the webs, one of which consists of a drum. The press-filter further includes a curved rigid roller race at least partially encircling the drum and spaced therefrom by a predetermined gap. A plurality of squeezing rollers are rollably mounted on the roller race wherein the filtering webs encircle the drum over a major portion of its periphery and pass between the drum and the squeezing rollers.

Abstract: A band screen conversion apparatus for filtering water comprising a structural frame and a conventional endless loop of screens mounted for movement in a circuitous path defining two vertical generatrices through which the water may flow in a dual-flow configuration. Extending outwardly and forwardly from each side of the structural frame is a curving, gull wing arcuate baffle having a ledge which engages a vertical guide track defined by the side wall of the foundation. An upstream flow deflector plate extends across the width and height of the band screen apparatus, with a plurality of support struts extending outwardly and rearwardly from the front of the flow deflector plate and connected to the front edges of the arcuate baffles via brackets which are similarly engaged within the guide tracks thus transferring the differential loads directly to the well guide tracks and side walls.

Abstract: An improved filtration for treating waste product which comprises a pair of filter belts, a plurality of squeezing rollers operatively connected to the filter belts, a plurality of fixed sprayers in the vicinity of the plurality of rollers for spraying hot steam, heating members for heating the rollers with hot steam, hot water, or hot air in the interior thereof, and a pair of cleaning members for cleaning and washing the belts, whereby the waste product is easily filtrated and dehydrated through the coaction between the belts and the plurality of rollers, and the belts are washed clean by the cleaning members.

Abstract: Filter apparatus and method for separating contaminants from a liquid stream through at least a partially submerged liquid pervious rotatable drum under negative pressure and having a flexible filtering web fed therearound with that portion of the drum not contacted by the filtering web being covered by a cover means with the filtering web being guided to enter and exit the liquid stream to contact the pervious rotatable drum at preselected angles to make optimum contact with the rotatable drum.

Abstract: A belt filter press comprising two co-operating, endless belts, particularly for manure, which according to the invention takes steps to enable liquid and solid substance to be better separated from each other. The pressure between the endless belts is increased, the longitudinal edges are sufficiently sealed and substance that is still too moist is subjected repeatedly to compression since it remains stuck to the upper endless belt and is carried to the intake of the belts.

Abstract: In an apparatus for dewatering sludge the sludge to be dewatered is continuously fed to a pre-dewatering stage and is subsequently transferred to an enclosed sludge chamber volume, which is intermittently moved past stationary pairs of pressure-applying plates. The pre-dewatering stage is consituted by a stationary dewatering container which serves also as a buffer between the means for the continuous fooding of sludge and the means for a discontinuous and intermittent transfer of the sludge to the sludge chamber volume. Owing to that design the plant has a low structural expenditure and is operable at a high dewatering rate.

Abstract: Apparatus for treating a pulp suspension with a treatment liquid is disclosed, comprising a continuous pervious belt for receiving the pulp suspension and moving it through a treatment zone in a predetermined direction. A treatment liquid supply is located above the continuous belt for supplying the treatment liquid onto the pulp suspension as it travels through the treatment zone, and a collector is located below the continuous belt for receiving liquid passing through the pulp suspension.

Abstract: A filter panel comprises a plurality of substantially coplanar openings. It incorporates a two-dimensional array of parallel elongate passages. Each passage delimits a respective one of the openings. The array is substantially coplanar with the openings and the passages are substantially perpendicular to the array. Each opening is convergent from an interior profile both from the inlet and outlet side of the panel.

Abstract: A labyrinth seal incorporated in liquid filtration apparatus to prevent migration of unfiltered liquid carrying solid contaminants and air which may be entrapped in such liquid past the lateral edges of a filter media carried on an endless conveyor into an underlying chamber for receiving filtered liquid. The seal includes a pair of low friction strips and an underlying seal support fixedly attached in superposed relation along both interior sides of the tank and extending between positions where the conveyor enters and exits the unfiltered liquid. The seal further includes one layer in a first embodiment, and two, superposed layers in a second embodiment, of fluid-impervious material affixed to each lateral edge of the conveyor chain or belt about the entire periphery thereof, and movable therewith.

Abstract: An improved slurry plow which includes provisions for both vertical and horizontal adjustment, characterized in that the plow includes a housing, a telescoping lower member which is spring loaded to retain the lower surface of the plow in slidable contact with an associated moving belt, and further including provisions to permit adjustment of the pressure exerted by the sliding contact and to provide vertical adjustment of the telescoping member.

Abstract: The invention relates to an apparatus or plant or arrangement for the treatment of a dilute suspension of fibers or layer of material passed between two endless foraminous belts or wires or the like conveying means, the forming fibrous board being made to pass between the foraminous belts along at least one container for a treatment medium and at least some of the treatment containers being provided with a wall having orifices on the side facing the fibrous board for generating a pressure difference on the same, but being otherwise closed against the environment, and/or at least some of the treatment containers closed against the environment having walls closed against the foraminous belts and thus against the fibrous board, but otherwise open towards the foraminous belts. According to the invention, a reduction of the energy requirement in the displacement washing of filter cakes is sought above all.

Abstract: A press for expressing liquids from liquid-containing substances, especially musts, contains an at least partially cylindrical sieve wall and a pressing apparatus disposed therein which has a rotatable shaft and separators radially fastened to the latter which form a plurality of press chambers. These are separated by a radially acting pressing means into a pressure chamber and a press chamber. To fill and empty the press chambers a charging station and a discharge station are provided. The sieve wall is stationary and the pressure chambers are sealed hermetically one from the other. Lastly, means are provided for rotating the shaft step-wise and thereby placing the press chambers step-wise successively at the charging station and at the discharge station.

Abstract: The flow of waste water sludge flocculant to a dewatering system is regulated by a surface proximity sensor located downstream of the flocculant addition point. Depth, variability and continuity of a partially drained sludge mat are evaluated by a depth sensor signal processor/analyzer. Signal characteristics representative of an optimally flocculated sludge mat are referenced by the processor/analyzer to establish high and low control set-point values. A variable speed flocculant supply pump or flow control valve is adjusted in response to an operational signal from the depth sensor which exceeds the set-point range.

Abstract: Versatile filtering apparatus is provided, particularly for processing liquid or coolant used with metal-working machines. The apparatus is adaptable for processing coolant in a wide variety of coolant systems to meet a variety of requirements of metal-working machines in a plant. The apparatus includes a dirty liquid tank in side-by-side relationship with a clean liquid tank, a coalescing unit, a filtering unit, an automatic supply or fill valve for supplying liquid to the apparatus from the coolant system, and an automatic discharge valve for supplying processed liquid from the apparatus back to the coolant system. The coalescing unit separates free oils from the liquid and the filtering unit separates solid particles from the liquid. The processed liquid is then discharged back to the coolant system along with fresh coolant.

Abstract: A method of dewatering filter cake in which the cake is supported on a positively driven pervious conveyor belt or filter cloth. The cake is guided about the circumference of a drum, with the drum positively driven at a variable speed of rotation. In the region of the drum, the pervious conveyor belt or filter cloth holds the cake against the periphery of the drum and additional pressing rollers press the filter cloth and cake against the drum. The drum drives the filter cloth in this region through the medium of the filter cake and induces shear effects in the cake. The speed of rotation of the drum is regulated in dependence on the tension existing in the filter cloth.

Abstract: The invention relates to a machine for pressing or dewatering and filtering of suspensions, sludges and the like with at least one driven endless pressure belt and further in particular at least one circulating endless filter belt, the pressure belt serving for the support of the filter belt. For the exertion of surface pressure onto the pressure belt, at least one frame-like, resilient, elastic hollow pad or a resilient, elastic hollow frame is provided, their interior being suitable for the admission of pressure medium and the pad or frame enclosing a pressure space, with a gap being provided at least during the admission of pressure medium between the hollow pad or hollow frame and the pressure belt.

Abstract: A pressure device for machines for dewatering or filtering of suspensions, sludges or the like or for material to be pressed for the exertion of surface pressure on at least one circulating pressure belt which can be provided for supporting an equally circulating filter belt, which pressure device consists of an essentially completely hollow pressure bladder in the form of a closed frame in particular of essentially quadrangular shape viewed in top view of the pressure belt, which pressure bladder is subjectable to pressure medium and forms a very small, self-adjusting gap on the edge.

Abstract: The invention relates to an apparatus for separating the flowable constituents from a mixture of flowable and non-flowable constituents particularly for the preparation of foodstuffs, the apparatus includes a driven perforated drum having a perforated circumferential surface, a pressure belt enclosing part of the circumference thereof and pressable onto the same by at least one pressure roller, as well as a supply mechanism for supplying the product to be treated into an entry wedge formed between the perforated drum and the pressure belt.

Abstract: An apparatus having a liquid-permeable belt for receiving cellulose pulp, a liquid supply device for discharging treatment liquid on the cellulose pulp, and a container extending across the entire width of the belt for collecting treatment liquid penetrating the belt. The container is adapted to maintain a treatment liquid level at such a distance from the belt so that the formation of foam from treatment liquid is reduced. The container includes a liquid outlet for discharging the treatment liquid and a vapour outlet for discharging vapours and gases from the bottom of the container. The vapour outlet communicates with a passageway within the container, which passageway is formed as a pipe or is partially defined by a container wall. A deflector can be provided on the container for operatively deflecting treatment liquid away from the passageway.

Abstract: The invention concerns a dewatering band press. The wires (2) in the press are wider than the rolls (1), and in view of sealing the edge of the pulp web (3), two rails (4) are placed outside the ends of the rolls, the wires running between the said rails, and a sealing beam (5) is placed between the rails and the wires. The solution is durable and reliable, because it has no readily worn abrading parts.

Abstract: A method of filtering utilizes a filtering apparatus having a filter member presenting a plurality of flow paths therethrough of a form to retain at least a portion of the material to be extracted the method comprising the steps of passing a stream of fluid to be filtered in a forward direction from an inlet through the filter member, moving the filter member out of the stream of fluid, changing the geometry of the filter member under gravity, e.g. by inverting the filter member, to assist in removal of extracted material from the filter member.

Abstract: The invention is a method and apparatus for treating a permeable web with a fluid. The apparatus has a rotatable drum with a fluid permeable endless belt reeved about at least a portion of the drum circumference. Two or more spaced-apart press rolls bear against the outer surface of the belt, pressing it against the drum with sufficient force to form nip zones. A belt position control mechanism gives the belt limited freedom of radial movement away from the drum in the area between the nip zones. This permits a gap of controllable dimension to form between the drum and the belt. The gapped region defines a volume which creates a permeable web treating zone. The drum surface has at least one row of spaced apertures located entirely around its circumference. These apertures communicate with a fluid supply system which can supply treating fluid under pressure outwardly through the surface apertures into the treating zones between the press rolls.