Abstract: An apparatus for uniformly pressing a plurality of flat plate-type structures together comprising a first and second vertical support means, a pair of side rails spaced apart and supported on the support means, the side rails being perpendicular to the support means and adapted to support flat plate-like structures, a plurality of flat plate-like structures with hanger members to slidably and pivotably mount the structures on the side rails, a vertical mobile platen provided with top and bottom hanger members connected to a press means adapted for pressing the mobile platen against and toward the flat plate-type structures to compress them together and retracting the mobile platen from the plate-like structures, the press means comprising at least one coiled spring, a first contactor plate attached to the mobile platen and a second contactor plate attached to a positioning device secured to one of the support means and a first and second guide chamber for directing the positioning device and coiled spring per

Abstract: An apparatus for effecting separation of filter plates within a filter press, which apparatus includes first and second filter plate engaging pawls pivotally mounted on a carrier which is supported for generally linear back and forth movement longitudinally of the filter press. The pawls have adjacent free ends which define thereon generally opposed abutment surfaces adapted for engaging opposite sides of a filter plate. One pawl is spring urged into a raised position, and this one pawl has an upper camming surface adapted for contact with a bottom surface on the filter plate to urge the first pawl into a lowered position. The other pawl is pivotally mounted in a manner free of springs, and has an upwardly projecting cam lug which defines the respective abutment surface on one side, and a camming surface on the other side.

Abstract: Membrane filter plate for a filter press or the like, with a carrier plate, at least one membrane arranged on one side of the carrier plate and preferably provided with spacing cams or the like for applying a filter cloth or the like and a sealing edge surrounding the carrier plate and membrane and interconnecting them in a substantially flow medium-tight manner, the peripheral surface or surfaces of said sealing edge parallel to the carrier plate median plane being arranged in the unloaded normal position thereof on the side having the membrane or on either side of the carrier plate, while being spaced from the membrane plane, wherein the contact surface of the carrier plate facing the membrane runs towards the carrier plate median plane in a transition area located between the connecting line of the membrane with the sealing edge and the central area of the carrier plate, in which it extends parallel to said central plate median plane.

Abstract: Composite, unbreakable plates for filter-presses are formed by the firm assembly of, in succession for each plate, a first thin frame 1 collecting the filtrates, a grooved resilient membrane 4 to squeeze the cake, a second thin frame 3 forming a chamber for the fluid inflating the membranes, a second similar membrane, and a third thin frame similar to the first frame. The filtration composite plate cooperates with a frame or is a recess plate which is spaced for unloading of the cakes collected. Each plate or frame has a small jack operating between small extensions at the top of the frames or on top of the plates for separating the plates.

Abstract: This invention provides a filter cloth assembly for use on a filter plate of a center-feed filter press, which comprises a two-part filter cloth with fittings for rapid and easy assembly on the filter plate, one cloth on each side. Methods of manufacture of the novel assembly and its parts and a new method for bonding otherwise incompatible plastics and elastomers are disclosed.

Abstract: The invention relates to an apparatus for cake removal in a filter press, and comprises a filter-cloth jolting mechanism as the cake removing means, with individual filter plates interconnected by loose connecting means for separating the filter plates one from another in equally spaced-apart relation. A jolting device for swinging the filter plates as carried by guide rails is connected to the filter plates, so that if the filter plates are caused to swing when they are in spaced-apart condition, lower end portions of adjacent filter plates are caused to strike against each other, such that a jolting effect is thereby given to associated filter cloths so that cakes are removed therefrom.

Abstract: Method and apparatus for pressure filtering in a pressure filter (1) comprising a frame carrying press plates (3-6), which can be brought together and apart, said press plates between themselves forming pressure chambers (8). In each pressure chamber there are two filter cloths (9) forming a filter element, said filter cloths being connected to each other in one piece and hanging down from a suspension rod (58) resting on guide rails (86). During operation a suspension of solid particles in a liquid is introduced between the filter cloths (9) in the pressure chambers (8). The liquid is pressed through the filter cloths (9) under the influence of membranes (7) loaded by a pressurized medium and by blowing through a gas and is removed through drain channels (10, 12, 14). The filter cakes (40) remaining between the filter cloths (9) are discharged after bringing apart the press plates (3-6) by vibrating (98) of the filter cloths (9).

Abstract: Membrane filter plate for a filter press or the like, with a carrier plate, at least one membrane arranged on one side of the carrier plate and preferably provided with spacing cams or the like for applying a filter cloth or the like and a sealing edge surrounding the carrier plate and membrane and interconnecting them in a substantially flow medium-tight manner, the peripheral surface or surfaces of said sealing edge parallel to the carrier plate median plane being arranged in the unloaded normal position thereof on the side having the membrane or on either side of the carrier plate, while being spaced from the membrane plane, wherein the contact surface of the carrier plate facing the membrane runs towards the carrier plate median plane in a transition area located between the connecting line of the membrane with the sealing edge and the central area of the carrier plate, in which it extends parallel to said central plate median plane.

Abstract: A method and device for installing gasket members between two adjacent flat plate structures including removably attaching a gasket member on each side of a frame member to form a frame member and gasket member assembly, interposing the frame member and gasket member assembly between at least two cell frame members disposed adjacent to each other, and contacting the flat plate structures with the frame member and gasket member assembly such that the gasket members adhere diametrically opposed to each other on the flat plate structures. The frame member includes a rib portion around the outer periphery of the frame member, the rib portion forming a pair of shoulders opposite each other and facing away from each other and adapted for receiving a pair of gasket members such that the gasket members contact the rib portion and protrude a predetermined distance beyond the shoulder members.

Abstract: An apparatus for effecting the separation of filter plates within a filter press for washing is disclosed. The apparatus includes a guide track having mounted thereon a slidably reciprocal carriage. The carriage includes multiple pivoted pawls having an abutment surface defined thereon for contacting a filter plate to be transported. The pawl is held in a raised orientation by a resilient spring means. The carriage is driven along the guide track by a pressure displaced piston in a rodless cylinder or tubular member. Positioned within the tubular member are two pressure chambers, one on each end of the piston. Pressurized fluid is controlledly introduced into one or the other of those chambers to effect a displacement of the piston. A pair of shifter carriages are provided at the top of and parallel to the filter stack. A plate washer includes a vertical pair of rodless cylinders connecting a pair of vertically movable cross-bars, each cross-bar mounting a series of wash spray nozzles.

Abstract: A filter press cloth hanger for a filter press comprising two arms joined at their upper ends by a pivot bolt which extends through platelike members welded to the tops of the arms. Each arm is similar in construction and comprises the hollow tubular outer wall in which slides a spring loaded rod. The rod carries at its lower end outside the arm a latching plate, which has a keyhold aperture, designed to fit over the end of a suspension member for a filter plate. The rod carriers at its free end within the hollow tubular outer wall, a stop member, which is screwed to the end of the rod and prevents the rod from being completely withdrawn from the tube. The stop is also profiled to prevent rotation of the rod within the arm and bears on one end of a compression spring which biases the rod in the arm. The pivot bolt carries a roller, which can run along a support bar, extending the length of the side bar filter press on which the hanger is to be used.

Abstract: A special, easy to use, economical frame is provided to quickly and efficiently align water purification cells in a vertical stack. The dependable, effective frame has moveable side and back posts and convenient crank or slide rod adjustments.

Abstract: In order to regulate the filter plate contact pressure in a plate filter press comprising a hydraulic closing cylinder unit, the compression force prevailing in the filter plate pack, or the compression of at least one component such as, for example, a filter plate, exposed to the compression pressure ambient in the filter plate pack is utilized as a control variable. The hydraulic pressure of the closing cylinder unit is regulated so as to maintain a desired compression value.

Abstract: A housing block with a first passage and a second passage extending parallel to the first passage is attached to each membrane filter plate. A piston is mounted slidably in the first passage and a spacing bolt is positioned slidably in the second passage. A first circumferential groove which is connected with a compression compartment between elastic membranes extending radially exteriorly is introduced into the center of the first passage. The piston has a plurality of, advantageously four, axially extending piston grooves which connect with the circumferential groove in the open configuration and because of that the above mentioned compression compartment is connected with the surrounding atmosphere. The operation of the pistons is positively actuated by a counterweight and the sealing bolts are positioned in succession in a row. The motion of these spacing bolts is bounded by a stop piece.

Abstract: Membrane filter plate for a filter press or the like, with a carrier plate, at least one membrane arranged on one side of the carrier plate and preferably provided with spacing cams or the like for applying a filter cloth or the like and a sealing edge surrounding the carrier plate and membrane and interconnecting them in a substantially flow medium-tight manner, the peripheral surface or surfaces of said sealing edge parallel to the carrier plate median plane being arranged in the unloaded normal position thereof on the side having the membrane or on either side of the carrier plate, while being spaced from the membrane plane, wherein the contact surface of the carrier plate facing the membrane runs towards the carrier plate median plane in a transition area located between the connecting line of the membrane with the sealing edge and the central area of the carrier plate, in which it extends parallel to said central plate median plane.

Abstract: Filter press structure or cell and method of assembling the component parts, e.g. the component parts of an electrolytic cell, on a support structure of a pair of support rods, in which the component parts have pairs of jaws to be positioned on the support rods, and in which each pair of jaws is so shaped that one jaw may be positioned on a support rod only when the component part is at an angle to the plane between the support rods, the method comprising positioning a jaw on a support rod and rotating the component part to contact the other jaw with the other support rod. The method is simple to operate and results in the component parts of the structure being firmly fixed in position, yet it permits ready removal of a component part.

Abstract: As a preliminary step, the dirty filter is dried to remove substantially all moisture from the dust on the filter. The filter is then spun in a closed cabinet. Simultaneously, a jet of pressurized air is reciprocated in close proximity along the inner surface of the filter. Also at the same time, suction is maintained on the cabinet, to remove dust-laden air and assist in the dislodging of the dust from the filter paper. By the combined actions of spinning, close-coupled reverse air jetting, and suction, the dust can substantially all be removed from the dirty filter.

Abstract: An apparatus for effecting the separation of filter plates within a filter press is disclosed. The apparatus includes a guide track having mounted thereon a slidably reciprocal carriage. The carriage includes at least one pivoted pawl having an abutment space defined thereon for contacting a filter plate to be transported. The pawl is held in a raised orientation by a resilient spring means. The carriage is driven along the guide track by means of a pressure displaced piston mechanically associated therewith. The piston is housed within a tubular member. Positioned within the tubular member are two pressure chambers, one on each end of the piston. Pressurized fluid is controlledly introduced into one or the other of those chambers to effect a displacement of the piston. The pressure cylinder is of the type generally designated a rodless cylinder.

Abstract: The invention provides a novel filter press comprising a filter chamber wall adapted to be axially displaced for exposing a plurality of filter units contained in the filter press. A certain clearance is provided between the substantially circular filter units and the interior wall surface of the housing or casing, the latter being sealed only adjacent its ends in cooperation with respective end walls. The sealing surfaces are disposed at locations away from the areas coming into contact with the filtering residues on evacuation and cleaning of the filter chamber. A particularly advantageous embodiment of a rotor for a filter press of this type is composed of rotor disks each comprising two axially displaceable rigid pressure plates which are prevented from being rotated by a hub disk interposed therebetween and non-rotatably mounted on the rotor shaft.

Abstract: An apparatus for dewatering primary dewatered sludge pieces conditioned with dewatering powders comprises: a first member having a recess and a path communicating with the recess, a fluid-tight diaphragm mounted over the recess thereby defining a fluid chamber with which the path communicates, a second member having a filtrate member, and a filter member provided over the filtrate chamber. At least one of the first member and the second member is mounted to bring them into fluid-tight contact with each other, and the primary dewatered sludge pieces into a cavity defined by the diaphragm and the filter member. A pressure fluid then is fed to the fluid chamber, thereby isostatically compressing the primary dewatered sludge pieces to remove the water contained therein without substantially destroying the inner structures of the primary dewatered sludge pieces. Because of this isostatic pressure exerted by the diaphragm, the sludge pieces are compressed highly uniformly, resulting in high dewatering efficiency.

Abstract: A filter press with central suspension of filter plates (5) is provided with a guide which ensures a flush alignment of adjacent filter plates, said guide lying outside the area affected by the filter medium, being integrated in a space-saving manner into the filter press, and permitting a certain amount of twisting or other overall adjustment of the filter plate package. For this purpose, the guide device is disposed on the filter plate suspension (9, 10, 18, 25) and is composed of at least one guide rod (19, 20) which is flexible to a limited elastic degree, and runs along guide members (1,2), and of at least one guide element (21, 22) for each filter plate (5) fitting around guide rod (19, 20), said elements being disposed on yoke piece (25) which supports rollers (19, 10) of the filter plate suspension.

Abstract: An apparatus for compressing and shifting flat plate-type structures including first and a second support members for supporting side rails attached generally perpendicular to the support members in a generally parallel and spaced apart position adapted for supporting any number of flat plate-type structures slidably mounted thereon, and a mobile platen for pressing the frame structures together, the improvement being an elongated slider member slidably mounted on the top portion of the side rails for slidably shifting the flat plate-type structures along the top and along the axis of side rails after clamping a plurality of cell structures, for example, to one stationary support member and clamping another plurality of flat plate-type structures together, thereby selectively shifting the desired flat plate-type structures a desired distance apart to remove or replace a flat plate-type structure or its internal parts disposed between the flat plate-type structures.

Abstract: A filter wall constructed separtely from the frame member is clamped in a clamping slot, to which toward the outside edge of the filter plate a widened sealing slot in a shoulder of the support is connected. A projecting edge of the filter wall extends into the latter slot with the shoulder overlapping, the filter wall having an annular flange directed to the outside. The seal is arranged in the sealing slot and has a U-shaped cross section with two arms extending inwardly, whose arms enclose and seal both sides of the annular flange and which seals the support on one side and the frame member on the other side. The spacing between the seal and the joint is sufficient that upon release of the closing pressure of the filter press, without disengaging it, the frame can be moved sufficiently far from the support that the pressurizable chamber is unsealed at the seal in the sealing slot.

Abstract: A horizontal-type filter press having a protective casing that surrounds at least the filter unit, including the support therefore. This protective casing prevents any leakage that might occur from the filter unit during filtration from adversely affecting operating personnel, from contaminating the filter unit, and from attracting insects or other animals. For the opened state of the filter press, the protective casing can be completely removed at least from the region of the filter elements of the filter unit, especially for being able to work on the filter elements, for providing an unobstructed exchange of the filter aids, and/or for the removal of usable or nonusable filter cakes.

Abstract: A filter press equipped with a filter cloth hanging rod detecting arrangement which includes a support beam which is so arranged between the front and rear stands and above the hanging rods as to suspend the shatter members by means of corresponding brackets. The brackets respectively have longitudinal apertures extending vertically or shafts extending horizontally. Meanwhile the shatter members respectively have shafts inserted in the longitudinal apertures of the brackets or apertures in which the shafts of the brackets are inserted. Accordingly the shatter members may move upwardly and downwardly according the vertical movement of the hanging rods and also swing in an imaginary vertical plane parallel to the support beam following to the horizontal movement of the hanging rods.

Abstract: A one-piece filter plate comprises a pair of webs surrounded by a flange, the webs and flange being integral with each other and of one-piece plastic construction. A pressure medium can be introduced between the webs to force them apart to dewater a filter cake that has built up between the outer surfaces of the webs and the corresponding outer surfaces of the next-adjacent filter plates. The filter plate can be made by vulcanizing together two halves along a medial plane of symmetry.

Abstract: A filter cloth hanging apparatus for a filter press, including a set of first and second support arms attached pivotally to each side face of each of filter plates, a spring attached to each of the first and second support arms, a set of first and second horizontal rods extending between opposite side faces of each of the filter plates through the springs, and a filter cloth attached, at its opposite ends, to the first and second horizontal rods and brought into contact, at its central portion, with a bottom face of each of the filter plates such that the first and second support arms are pivotally coupled with each other between each pair of adjacent ones of the filter plates.

Abstract: A washing apparatus for filter presses which is used for washing filter cloths on filter plates upon completion of filtration comprises a carriage disposed above the filter plates, a pantograph attached to the carriage, a fluid cylinder having its rod connected to the intermediate pivot of the pantograph, a washing liquid spraying pipe connected to the lower link overlap region of the pantograph and having nozzles, multiple extensible pipes disposed between the carriage and opposite sides of the pantograph attaching region of the washing liquid spraying pipe for holding the washing liquid spraying pipe horizontal, and a flexible conduit connected to the washing liquid spraying pipe and adapted to move to follow the expansion and contraction of the pantograph.

Abstract: Automatic plate separation in filter presses is effected by a carriage (6) which is reciprocated to and fro adjacent a stack of plates (1). The carriage (6) has means for engaging the first and second plates in the stack and for urging them apart so that as the carriage is retracted to remove the first plate (1a) from the stack, the second plate (1d) is urged against the stack to ensure that the plates are moved one at a time.

Abstract: A plate filter press includes a number of filter plates slidably suspended on a horizontal upper frame and dogging means mounted on a chain extending above the filter plates to move together with the chain and engageable with the respective filter plates for progressively opening the filter plates so as to be spaced apart from each other. The filter press according to the invention comprises dogged bars engageable with the dogging means and located on the respective filter plates at a level substantially the same as that of slide surfaces of the filter plates slidable on the upper frame, filter plate connecting chains on the filter plates at a level substantially the same as that of the dogged bars, and stoppers on the filter plates at a level above the dogged bars, thereby preventing the filter plates from swinging and tilting.

Abstract: A filter press includes a frame mounted on posts, a thrust plate secured on the posts in mid-section of the frame, filter plate assemblies arranged on either side of the thrust plate, and a clamp for the filter plates assemblies. The clamp of the filter plate assemblies includes pressure plates, a drive, and braces. The braces of the clamp for the filter plate assemblies are movable both horizontally along the longitudinal centerline of the filter press and vertically relative to the longitudinal centerline. They are also pivotably connected by ends thereof to the drive and by the other ends to the pressure plates.

Abstract: The invention relates to filter presses comprising a frame 5 controlling the displacement of means for extracting the filter cake between a position of filtering and a position of cleaning, said frame 5 being formed of at least two posts 6, 7 mounted slidingly in guide means 8, 9 provided on the lateral edges of each plate 1, 2 and which carry at their free ends crosspieces, one of which has two lateral fingers 13, 14, cooperating with a control bar 15, 16 which is actuated by control means adapted to displace the unit of filter frames.

Abstract: A filter includes a lower filter plate mounted to a frame, an upper filter plate movably mounted above the lower filter plate and filter paper between the two plates. A number of shafts are mounted to the frame below the lower filter plate and extend past opposite sides of the filter. Elongate crank arms and eccentrically positioned tie rod connection pins are secured to the ends of the shafts. The upper ends of the tie rods are mounted to opposite sides of the upper filter plate. The tie rods' lower ends are pivotally mounted to the tie rod connections for eccentric movement about the axes of the shafts. A pneumatic ram is used to rotate one of the shafts through an actuator arm keyed to the shaft. The outer ends of the crank arms on each side are coupled together by connecting bars so the crank arms move in unison. A locking arm is mounted to one of the shafts and is positioned to engage locking recesses in upper and lower locking dogs when the upper filter plate is fully opened and fully closed.

Abstract: A filter press including a plurality of filter plates, a pair of filter cloths disposed at opposite faces of each of the filter plates, a wind-up device for winding up the pair of the filter cloths, a guide member having a pair of curved guide surfaces formed at its opposite side edges, respectively and a pair of guide rollers. The pair of the filter cloths are guided downwardly by the guide member and the pair of the guide rollers so as to be wound up by the wind-up device such that the pair of the filter cloths are bent inwardly toward each other at the pair of the curved guide surfaces of the guide member, respectively.

Abstract: A filter cloth oscillating apparatus for a filter press wherein the filter cloth generally suspended over springs from a filter cloth hanging rod extending laterally perpendicular to the direction in which filter plates are opened to oscillate the rod and cloth to shake off and filter cake adhering thereto has a drive unit and crank mechanism mounted on a moving bed for moving the upper portion of a filter press horizontally, an oscillating head and actuator therefor, and by means of a plurality of guide members for oscillating the head vertically as well as horizontally. The oscillating head is lowered and raised pneumatically so that in the covered position it can engage with and oscillate the filter cloth hanging rod.

Abstract: This invention relates to a filter press in which between a pair of heads a plurality of filter plates are connected to one another by loose connecting means. In the improved apparatus, the heads are both movable so that the filter plates may be moved in sequence, simultaneously from both end sides, toward the center to close the intervals therebetween or away from the center to provide intervals therebetween, whereby the time required in assembling and separating the filter plates can be considerably reduced. When the filter plates in assembled state, if one of the heads is pressed, while the other head is placed under action of stoppers, the filter plates are vigorously tightened by a cylinder having a shorter stroke than that in the prior-art apparatus.

Abstract: A liquid filtering apparatus comprises upper and lower platens and a plurality of intermediate plate members between the platens. When pressed together with a sheet of filter media between each pair of adjacent plates, a fluid-tight chamber for incoming liquid to be filtered is formed on one side of the filter media. When the filter media requires replacement, the upper platen is lifted to separate the plates. Each plate is provided with combined alignment and stop means so that when the plates are again brought together after renewal of the filter media, they will automatically resume their normal stacked position in proper alignment, the stop means also providing a preselected amount of space between adjacent plates to cause a desired amount of compression for a sealing member between the plates. The alignment and stop means is designed to absorb the compression load on the plates, thereby enabling them to be made of lighter metal or plastic materials without overstressing their side walls.

Abstract: A slurry feeding device for use in a filter press including at least one pair of first and second filter plates formed with first and second slurry holes, respectively, and a pair of first and second filter cloths interposed between the first and second filter plates. The device includes a pair of first and second plate members formed with first and second through-holes, respectively, and a plurality of first and second fastening members by which the first and second filter cloths are, respectively, secured to the first and second plate members.

Abstract: A filter press with filter plates slidable individually by a transport element has on each filter plate a locking hook which cooperates for locking with a locking bolt of the adjacent filter plate. A pivotable blocking element, which in the blocked position, positively blocks the locking hook locking this filter plate against unlocking and is connected to an actuating member which projects into the path of the transport element so that immediately before the latter takes along the relevant filter plate it engages the actuating member and thus pivots the blocking element into a release position so that the filter plate is separable after release of the locking hook. Each respective filter plate to be slid thus remains positively locked to the as yet unopened plate stack until immediately before it is taken along by the transport element and cannot become separated from the stack accidentally.

Abstract: A filter press comprises a main frame having upper side bars for movably supporting a plurality of plates in horizontally stacked relation. The plates are moved to open the filter press by plate transporting trolleys which are supported on the upper side bars. Light emitters are mounted at one end of the press on each side bar and light detectors are mounted at the opposite end of the press on each side bar and are aligned to receive light from the light emitters. Shutters are coupled to the plate transporting trolleys such that the light from the light emitters is normally blocked by the shutters. The shutters are opened for a brief period of time when the plate transporting trolleys are moved into engagement with one of the filter plates such that plate engagement signals are generated by the light detectors.

Abstract: The invention relates to a method of closing, compressing and opening filter presses for membrane filters with a stationary upper yoke (7) and a lower yoke (6) movable on vertical press columns (2) and has for its object to improve the service and buildup of such membrane filter presses. This is achieved according to the invention by a method in which a loose lifting tool (10) is fitted under the movable yoke (6) and set in operation, whereby the yokes and the press plates situated therebetween are pressed against each other whereupon the movable yoke (6) is locked in the position taken and, upon opening of the press, is released whereupon the lifting tool is set out of operation and is removed.An apparatus for carrying out the method is characterized in that, between the movable yoke (6) and an abutment (4) there is an interspace (14) in which a lifting tool (10) can be placed and set in operation or out of operation.

Abstract: Apparatus for separating and displacing the plates of a filter press, one by one, is provided with a rail mounted above and extending along the length of the press on which a trolley is supported. The trolley is movable reciprocably along the rail by an endless envelope change drive, entrained with a sprocket wheel fixed on a shaft, journalled in the trolley. A separating device is supported in the trolley for movement reciprocably perpendicular to the direction of movement of the trolley toward and away from the filter plates. The separating device is connected to the sprocket shaft so that rotation of the shaft lifts or lowers a separating wedge relative to the filter plates separating the first of the filter plates and enabling the trolley to displace it alone.

Abstract: A mechanical or attachment holder and support means for securing a spline driven in a groove for holding down a flexible sheet or filter screen under continually changing temperatures and high pressures comprises, a plurality of 90.degree. angle clips in axial alignment on the spline extending around the periphery of the filter screen with one leg of the clip pressing the spline down and the clip other leg being positioned against a longer side of the groove, and screw inserted through the 90.degree. clip bisecting the 90.degree. angle between of the clip legs for securely fastening the spline and the filter screen under the spline securely to a filter screen holder for resisting the environmental conditions of continually changing temperatures between 200.degree. and 250.degree. F.

Abstract: A plate-type filter press having a cleaning truck movable in the direction of movement of the slidable filter plates embodies a drive and a pusher adapted to be brought into engagement with the filter plates. The cleaning truck has a releasable brake and the pusher is extensible by the drive in the direction of movement of the filter plates.

Abstract: The upper ends of filter cloths attached to two adjacent filter plates are connected to a filter medium hanger suspended from suspension arms pivotally mounted on one of the filter plates in the upper regions on opposite sides thereof. Arm rests for supporting the suspension arms are provided on the other filter plate in the upper regions on opposite sides thereof. When the filter plates are moved from their closed state for filtration to their opened state upon completion of filtration, the suspension arms, tilting as supported by the arm rests, are caused to vibrate, thereby accelerating the stripping of the cake which has accumulated on the filter cloths connected to the filter medium hanger.

Abstract: A method of assembling an electrolytic membrane cell is disclosed. The method includes the steps of conditioning the membranes with a conditioning fluid, assembling a vertical stack of horizontal electrode frames with a horizontal membrane sheet between each pair of frames, applying pressure to vertically compress the vertical stack, rotating the compressed vertical stack from a vertical orientation through approximately 90.degree. in which orientation of the stack is called a "pack", connecting the pack into an electrical circuit and to raw material supply lines and product withdrawal lines and then electrically operating the pack while maintaining the pack in a horizontal orientation.

Abstract: A device for moving filter plates from one end of a filter press to the other end, includes carriages which selectively couple to each of the plates and which are driven to slide along the frame members of the press by a hydraulic motor. A control means is provided to control the operation of the hydraulic motor.

Abstract: Apparatus for extracting used portions of filter media sheets from between vertically stacked and separated plates of a liquid filtering apparatus and for simultaneously advancing fresh portions of the filter media sheets from supply rolls into the space between the vertically separated plates comprises a plurality of vertically arranged clamps on the downstream side of the filter plates adapted to engage and firmly grip the opposite lateral edge portion of the sheets, the clamps being mounted on a carriage which is reciprocated through a linear generally horizontal stroke.

Abstract: A filter press having a plurality of plates adapted to be arranged in abutting relationship in an operating position and to be separated from the operating position for cleansing, replacement or the like, having a pair of first and second reciprocable conveyors arranged respectively along opposing side edges of the plates. Each of said first and second conveyors carry first and second members respectively for engaging the plates selectively during movement of said conveyors, so that when moved in one direction each of the first conveyors and first engaging members act to move the first of said plates from the operating position while each of the second conveyors and second engaging members when moved in an opposite direction act to retain the second of the plates in the operating position.

Abstract: The chain-carried pawls which are to shift the plates on the rails of a filter press in successive order are provided with roller weights which ride on upper and lower tracks and provide the improved shifting of the plates and support of the lower runs of the chains.