Abstract: A plate-type filter press has sidebars carried on fixed frames, and the filter press plates, the queen end and the king end are all supported on the sidebars by means of pins projecting laterally from the plates and the king and queen ends and resting on the bars. The plates and the queen end are able to slide along the bars on their pins, and even the king end is allowed a limited amount of float between stops on the bars. The press is opened and closed by means of double-acting hydraulic piston-and-cylinder units which are mounted on the king end and are coupled to the queen end by longitudinally extending tie rods so as to close the press by pulling the queen end towards the king end.

Abstract: In a plate filter press with filter plates (8) suspended on support guides (3, 4), which filter plates are guided along stop rails (23, 24) for the purpose of preventing pendulating oscillations, the oscillation protection is to be constructed so that a required filter plate replacement or filter cloth exchange can be carried out without disassembly of the oscillation protection.For this purpose, the provision is made that the stop rails (23, 24) can be operatively adjusted away from the filter plates (8), and to attain this objective, the stop rails are preferably pivotable about axles (30, 31) extending in parallel to the longitudinal axis of the filter press.

Abstract: A plate type filter press, which is opened and closed by at least one hydraulic piston-and-cylinder unit, has a mechanical lock to lock the press in the closed position so that it is not necessary to maintain a high hydraulic pressure to keep the press closed. The mechanical lock may be a set of claws on the hydraulic cylinder to co-operate with a locking ring on the piston rod, with a hydraulic lock cylinder to retract the claws for unlocking, or a lock gate that is introduced into or retracted out of the path of a lock collar on the piston rod by operation of a lock cylinder. The press is first closed with a predetermined high hydraulic pressure that compresses the filter press pack sufficiently for easy movement of the mechanical lock into locking position, and then operation of a lock limit switch automatically stops the hydraulic pump and energizes a bleed valve to reduce the closing pressure to a level at which the press pack compression is relaxed enough to give firm lock engagement.

Abstract: The filter press includes pressing members for pressing the liquid out of a slurry of a solid in a liquid to form a solid cake. The pressing members are then separated to drop the cake through open diverter doors. The pressing members are washed after the diverter doors are again closed.The diverter doors are pivotally mounted with one diverter door having a portion thereof overlapping the top of the other diverter door in the closed position. Means are provided for pivoting the overlapping diverter door from the closed position in a first rotational direction and then in the opposite rotational direction while simultaneously pivoting the other diverter door in said first rotational direction.

Abstract: An improved filter plate of the type used with a vertical stack of other such plates to form an industrial filter of the type known as a horizontal plate filter. The improved filter plate has a generally upright side wall, and a divider plate or transverse planar plate portion secured to the side wall below the upper margin thereof. An open top trough is formed in the divider plate to receive the filtrate passing through a filter medium above the filter plate when the latter forms a part of a horizontal plate filter. A hole in the side wall permits the filtrate to be removed from the trough. The filter plate further includes a fluid inlet conduit and an air vent/blowdown conduit extending through the side wall into the space below the divider plate. The trough and removable conduits eliminate the need for fixed baffles for use as the fluid inlet, outlet, and blowdown means as found in a conventional filter plate.

Abstract: A conveyor device for pulling apart or conveying filter plates of a filter press. The conveyor device includes a carriage that is adapted to be moved along above the filter plates. The carriage is provided with a pawl and a drop lever that successively engage and transport filter plates, with the carriage passing from one end of the filter press to the other end of the filter press during one work cycle. The carriage automatically returns to a starting position at the other end of the filter press after a completion of the work cycle and, for this purpose, run-up ramps are provided at the ends of the filter press, with one of the run-up ramps being adapted to swing the pawl and drop lever into an opposite stop position so as to enable the elements to travel above the plates without contact. The other run-up ramp at the other end of the filter press again releases the pawl and drop lever and brings them back into a ready setting for a subsequent new work cycle.

Abstract: An improved filter press for separating solids from liquid is provided. The press includes a plurality of filter plates which are suspended from overhead I-beams such that the plates may be removed either from the top of the press or from the sides of the press as desired. The filter plates are suspended from the I-beams by rollers which alternate in position for adjacent filter plates between engagement with the outside flanges and engagement with the inside flanges of the beams and, thus, allow larger rollers to be utilized. The filter press includes a press head for moving the individual filter plates into abutting relationship which is pivotally suspended from the I-beams such that the press head can assume the alignment of the filter plates when the press is closed. The press further includes a pair of vertically-arranged, independently-operable hydraulic closing rams for applying different closing pressures at the top and bottom of the filter plates to compensate for variations in plate stacking.

Abstract: A plate filter press has a horizontal guide carrier extending in the length dimension of the plate filter press; a plurality of vertically oriented filter plates shiftably supported on the guide carrier; and a filter plate shifting apparatus for individually displacing the filter plates from a closed side towards an open side of the press. The filter plate shifting apparatus has a motor driving a traveling carrier element and filter plate engaging elements mounted on the traveling carrier element. There is further provided a displacement sensor for emitting signals in response to the motion of the filter plate engaging elements and a monitoring and control device connected to the displacement sensor for receiving its signals for determining the position of the successive traveling paths of the filter plate engaging elements with respect to the guide carrier to determine the required displacement characteristics for each filter plate.

Abstract: A filter press includes a plurality of filter plates displaceable parallel to the filter press length towards the open side and in an opposite direction towards the closed side of the filter press and a filter plate shifting apparatus for individually moving the momentarily outermost filter plate from the closed side towards the open side.

Abstract: A chamber filter press embodying movable filter plates suspended for movement along horizontal guides by an endless transporting assembly driven by a reversible motor and carrying dogging members which cooperate with cams on the filter plates as the press is opened. A switch connected to a time control device reverses the motor when the filter plate which has just been moved rests against the previously moved filter plate and at the end of a preset time the time control device switches the motor from reverse to forward motion. The motor is stopped by a limit switch which is operated by a dogging member at the end of a preset time after the last filter plate has been moved forward.

Abstract: A filter press includes a plurality of plates made of a rigid material resting on a pair of parallel horizontal supports by means of lugs extending from opposite sides of the plates. The supports are attached at one end to a fixed headstock having a liquid inlet and at the other end to a hydraulic ram assembly, each plate supporting a sheet of filter material, and being mounted in a row so that they can be arranged in a first, working, configuration wherein they are all clamped together and a second, cleaning, configuration wherein there is a gap between a selected two of the plates to allow removal of residue therefrom. The filter press has a drive which operates to move the plates one by one into abutting relationship adjacent the headstock before they are clamped by the ram action and which can be reversed to separate the plates and move them one by one to positions remote from the headstock for cleaning so that the gap between any selected two of the plates is constant.

Abstract: A method and apparatus are disclosed for mechanically locking a movable filter shell of a pressure filter in filtration position adjacent a second fixed filter shell, in order to accommodate and resist higher internal filtering pressures. In the method, a gasket between the two filter shells is compressed to an extent greater than necessary to achieve a liquid tight seal, in response to movement of the movable shell toward the fixed shell. Next, a locking member is freely inserted between the movable shell and an abutment with clearance being provided in order to facilitate the insertion of the locking member due to the movable shell excessively compressing the gasket. Upon initiation of the filtration cycle, the movable shell is slightly displaced away from the fixed shell in response to internal filtration pressures, with the locking member preventing further displacement in order to maintain the gasket in water-tight sealing compression.

Abstract: A filter press provided with a spray cleansing device of the kind described in U.S. Pat. No. 4,107,042 granted Aug. 15, 1978 to wash filter plates of the press disposed in a stack on horizontal guides in which the spray device comprises a support frame which moves along the stack of plates on the horizontal guides. Two branch conduits of the device are fitted with nozzles and surround a plate being washed to spray wash the plate simultaneously from both sides. The specific improvement in the present invention comprises a novel spray water catch basin which has a width more than twice the spacing between the branch conduits. Movable segments on both sides of the catch basin are provided which may be pivoted about a perpendicular axis to adapt the catch basin to many locations along the filter press.

Abstract: Filter press consisting of a frame having a fixed head, with guides for filter plates provided with communicating ducts and having supply and discharge connections and with a loose head having a clamping device for clamping a set of filter plates against the fixed head, wherein a carriage or slide is situated above the filter plates for travel along horizontal guides and is provided with means which can be moved vertically with respect to the carriage or slide to release a plate from the set of plates and establish a coupling with the plate such that the plate is driven when the carriage or slide is moved.

Abstract: A filter press comprising filter cake discharge means including hammers which give upper portions of filter cloths vibrations caused by circular movement of the hammers to facilitate discharge of filter cakes adhered to the filter cloths after filtration.

Abstract: This invention relates to filter presses of the kind comprising a plurality of separate filter plates which are supported by or from a main frame so as to form a stack at one end of the frame during a filtering operation, and which are arranged to be moved one by one towards the opposite end of the frame to enable filter cakes to be removed from between the plates.The plates are heavy and tend to stick together, and known mechanism for moving the plates individually is either complex and tends to clog with the clay or like being filtered in ordinary usage, or fails to take account of the sticktion resulting in the press jamming.

Abstract: A filter press includes a plurality of filter plates disposed in a row, each having an arm extending laterally outward from the opposite, lateral sides thereof, which are slidably supported on a pair of spaced-apart, parallel tracks, the latter of which are each associated with a synchronously-controlled, reversible chain drive. Each of the plates has a pivot lever mounted on each of the arms thereof, which is movable between a locking position, in which it couples the plate to the preceding plate and, a release position, in which it disengages the plate from the preceding plate. A plurality of cam assemblies are carried on the chain drives, which successively permit individual release of one of the plates from the preceding and succeeding plates, while the remaining succeeding plates remain locked together.

Abstract: A filter press has a plurality of filter plates which are individually shiftable by a gripper of a moving mechanism. The filter plates can be releasably locked to one another by a locking hook pivotally supported on each filter plate and engageable behind a detent pin carried by a respective adjoining filter plate. Each filter plate further has a pivotal detent lever operatively connected with the locking hook of the same filter plate and the detent levers of the respective two adjoining filter plates. When the filter plates are close together, the detent levers, by mutual interaction, are pivoted out of the traveling path of the gripper of the moving mechanism.

Abstract: The present invention relates to filter apparatus having a filter press charged by a diaphragm pump, a hydraulic closure and an automatic conveying device including a hydraulic plate conveyor device for the filter plates which are displaceable in suspended or upright state. The apparatus employs, instead of a plurality of electromotively driven drive mechanisms including chain drives, a central hydraulic liquid supply for the simultaneous or alternate impacting of the filter press closure, for the hydraulically driven diaphragm pump and the hydraulic plate conveyor device.

Abstract: A plate filter press has a horizontal guide carrier; a plurality of filter plates shiftably supported on the guide carrier; a projection affixed to each filter plate; and a filter plate shifting device which includes a carrier element supported for displacement parallel to the guide carrier; a drive for moving the carrier element back and forth; as well as a shifting element and a reversing element mounted on the carrier element and arranged for engaging the projection of the filter plate to be shifted. The shifting element and the reversing element each are single-armed levers pivotally secured to the carrier element. The levers have respective free ends oriented towards one another. A bell crank lever is pivotally mounted on the free end of the reversing lever.

Abstract: The invention relates to a movable apparatus for removal of filter plates from a filter press, these plates resting on two horizontal guide carriers. The apparatus has a carriage, movable on the guide carriers, which has a driving apparatus for a driver means, in order to always pull off the outside filter plate from a pack of filter plates, and a bolt for holding back the remaining filter plates in the pack. The driver means and bolt are arranged in such manner that the driver means and bolt are movable up and down between a lower engaging position aligned with stops on the sides of the filter plates and an upper dis-engaging position away from such stops.

Abstract: The invention relates to a filter press construction of the type having a plurality of filter plates suspended from two parallel I beam carriers, the filter plates being provided with a novel supporting arm suspension which prevents undesired swinging. The supporting arms are bent to diverge on both front and back sides of the filter plates, two arms on each side of the vertical center of the plate to provide a novel suspension consisting of two leading bent arms and two lagging bent arms for each filter plate in its operating condition suspended for movement on the I beam carrier. The arms of the filter plates are provided with roller or equivalent sliding elements to facilitate shifting movement on the guiding flange surface of the parallel I beam carriers. This unique leading and lagging supporting arm construction on the I beam carrier eliminates serious swinging problems encountered with conventional filter presses using the parallel I beam carrier suspension for the filter plates.

Abstract: An apparatus comprising a pair of reciprocally movable carriers each provided with a drive dog and a stop dog tiltably pivoted to the carrier and biased toward a tilted position in the direction opposite to a direction of transport of filter plates, a stopper for preventing the drive dog positioned toward the opposite direction from tilting toward that direction and releasing the drive dog from its prevented position, another stopper for preventing the stop dog from tilting toward the transport direction, and a freely movable member pushable by the drive dog to raise the stop dog when the drive dog tilts toward the transport direction.

Abstract: A single type filter press comprising a plurality of vertically suspended filter plates, with which any filter frame is not provided, is disclosed. The filter press comprises a plurality of U-shaped filter cloths. Each filter cloth is guided by a guide roller rotatably mounted at the lower part of each filter plate and has upper ends connected through filter cloth holding rods and a cord-shaped driving member to a driving wheels. When the filter cloths are opened, the driving wheel is rotated in opposite direction so as to move the filter cloth upwardly and downwardly, thereby discharging cake adhered to the cloths.

Abstract: A plate filter press has a plurality of filter plates; an overhead guide carrier extending in the length dimension of the press and a suspension displaceably supporting each filter plate on the guide carrier. The filter plates are oriented, with their flat sides, perpendicularly to the length dimension. The suspension comprises first, second and third guide tracks affixed to the guide carrier and extending parallel to one another in the length dimension. The first and second guide tracks define a first guide plane, while the third guide track lies in a second guide plane extending parallel-spaced from the first guide plane. Each filter plate has spaced first, second and third guide elements (such as rollers) engaging the first, second and third guide tracks, respectively. The first and second guide elements are spaced transversely to the length dimension; the third guide element is spaced from the first and second guide elements in the direction of the length dimension.

Abstract: A filter press comprises a support plate and a pressure plate and a set of chamber-type filter plates arranged therebetween. Each filter plate is provided with a cloth filtering barrier in the form of an endless belt which is supported by two rollers fastened to two opposite walls of the filter plate in such a manner that both runs of the belt extend on the side of a draining barrier of the filter plate. There are provided two bars for displacement of the filtering barriers extending along the set of the filter plates on opposite sides of the set, the bars having a drive for their concurrent transverse reciprocation, and there are also provided rods which are fixed to each endless belt to extend transversally thereof and movable along and together with the bars in transverse direction relative to the set of the filter plates.

Abstract: A filter press is proposed wherein the number of chambers and the depth of each chamber are each significantly less than the corresponding parameters of conventional structures, yet the throughput of a press having a press volume which is only a small fraction of that of the conventional press bears favorable comparison with the throughput of that conventional press.

Abstract: A filter plate opening mechanism for successively opening a plurality of filter plates of a filter press comprises filter plate pulling latches arranged on every other filter plates, pivotal pendulums arranged on remaining every other filter plates, space holding chains connecting all the adjacent filter plates and a pair of carriage reciprocally movable in plate opening and reverse directions having a pair of ratchets capable of depressing and restoring to their extended positions. When the carriages move in the opening direction along the both sides of filter plates, one of the ratchets causes one of the filter plates to open and its movement causes the other filter plates to open with the aid of the space holding chains.

Abstract: In a filter press having filter frames arranged parallel to each other so that they may be opened and closed, a liquid-feed metallic member, positioned at a side portion of the filter frame for feeding liquid to be processed to each filter chamber formed between adjacent filter frames, is fixedly secured to one of two links pivotably mounted with pins onto the respective adjacent filter frames in such manner that in response to opening and closing of the filter frames the liquid-feed metallic member may be automatically engaged with and disengaged from recessed portions of the filter frames. These recessed portions communicate with said filter chamber via filter cloths.

Abstract: A filter press for mechanically separating solids from liquid, slurries, suspensions and the like having a rigid frame including a first stationary end member which is a filter press head, a second stationary end member, and a pair of side rail members which extend horizontally and parallel to each other and which are supported at their opposite ends by the stationary end members. The filter press also includes a first and a second set of filter plates mounted for sliding movement on said side rail members and means interconnecting the plates in each set to allow limited travel of the interconnected plates away from one another while also allowing adjacent plates to move into abutting relationship with one another.

Abstract: There is disclosed an apparatus suitable for shifting the plates of a plate filter press. The apparatus comprises supporting means for supporting the apparatus so that it can be moved longitudinally of the plate filter press, and a manually-operable, power-drivable device including first and second members capable of engaging plates of the plate filter press and movable relative to one another by a source of power along a line of action which, when the apparatus is in use is parallel to, or substantially parallel to, the plate filter press. The arrangement is such that, in use, the device can be rotated or swung in order to bring the first and second members into and out of engagement with plates of the plate filter press and, when in engagement with plates of the plate filter press, the device can be operated to cause movement of the first and second members relative to one another and hence movement of one or more plates of the plate filter press.

Abstract: The disclosure is concerned with a filter press for performing a liquid-solid separation or clarification of highly viscous material such as fowl droppings or sea-bottom muds and, more specifically, with a double acting filter press having a function of additional pressing or squeezing of the material which ensures, in combination with the pressing performed by the liquid pressure onto filter cloths, an increased efficiency and capacity of the filtration. Disclosed herein is a reasonably designed arrangement for performing the above mentioned double acting functions.

Abstract: A filter press having a number of filter plates, each of which includes a center hole, with a filter cloth hanging over each filter plate. The filter cloths include a corresponding center hole, and a flexible coupling member having a tubular stem with a flanged base, wherein the flanged base is positioned around the hole on one side of the cloth. The tubular stems are inserted within a coupling cylinder which is positioned within the hole of the filter plate. A method is described for hanging the filter cloths onto the filter plate by inserting one of the stems into one end of the coupling cylinder, and then inserting the cylinder into the hole in the filter plate. A tool is then used to reverse the stem of the coupling member of another filter cloth, and then the same tool is removed permitting the restoration of the stem while positioning it within the other end of the coupling cylinder.

Abstract: A filter plate having a plate frame with filtrate discharge means covered by filter cloth adjacent the bottom of a filter cake chamber defined by recesses in the plate. A cam projects from the bottom of the filter cake chamber and is adapted to support the filter plate on a corresponding cam on an adjacent filter plate with the cam extending substantially to the level of the outer surface of the frame of the filter plate. An opening is provided in the filter cloth covering the plate frame for receiving the cam. A clamping ring surrounds the cam and the filter cloth adjacent thereto to form a seal therebetween. A washer-like member overlies the cam and a portion of the clamping ring and retains the clamping ring in place.

Abstract: A filter press plate for layer and settling filters having an open frame of stainless steel and at least one partition plate of corrosion resistance material detachably supported within the frame by means of cooperating lugs and recesses on the mutually facing edges of the at least one partition plate and frame, sufficient clearance space being provided between the peripheral edge of the at least one partition plate and the adjacent frame edges as to accommodate any difference in the heat expansions thereof at the maximum temperature to which the filter press plate is to be exposed. The frame includes exteriorly projecting hollow eyes which define manifolds for supplying and removing the liquid to be filtered when a plurality of the elements are stacked together in use. The at least one partition plate is profiled on its opposite side faces to form channels for the liquid being filtered.

Abstract: In the filter press of the type in which a plurality of movable frame members are arranged between a pair of heads with at least one filter cloth supported therebetween, one of the heads of the press is movably supported so that the movable head may be advanced and retracted by a hydraulic cylinder for tightening the frame members, being carried out under a condition that the heads are closest to each other so that the frame members are tightened and the cakes-discharging operation being carried out by travelling the filter cloth under another condition that the heads are remotest from each other so that the frame members are separated and the other head of the press, which is fixed in conventional filter presses, is also supported movably so that it may be advanced and retracted.

Abstract: A filter press has a support frame; a plurality of face-to-face oriented filter plates movable towards and away from one another and forming a filter plate stack; a closing device connected to the filter plates for exerting thereon a pressure with which the filter plates are urged to one another; a closing pressure regulator coupled to the closing device; a stationarily supported path-sensing signal transmitter connected to the closing device; and a sensor arm connected at least indirectly to one of the filter plates for displacing the sensor arm by, and as a function of the motion of, that filter plate. The sensor arm is coupled to the path-sensing signal transmitter for controlling the closing pressure of the closing device by the signal transmitter as a function of the position of the sensor arm.

Abstract: A filter press having at least one movable bar extending lengthwise of the press, means for imparting constant length reciprocating movements to the or each bar, a plurality of pawls spaced apart at intervals along the or each bar, the trays having projecting pins for engagement by the pawls, and a block having a flat bottom fitted pivotally on each pin and adapted to engage slidingly with a fixed side or overhead bar as the tray moves along the press.