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 having a slurry feed inlet arranged at the lower ends of filter cloths at locations outside filter chambers formed by filter plates thereby enabling the filter cloths to entirely open when the filter plates are opened to facilitate discharge of cakes adhered to the filter cloths.

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: A method and apparatus for the removal of cakes from an open filter press is proposed which involves directing one or more jets of a pressure fluid towards the chamber to impinge on an edge of the cake and/or on the filter cloth adjacent such edge. If desired, the jet or jets are oscillatable so as to sweep across the said edge or the filter cloth adjacent such edge.

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 cloth washing device for a filter press, wherein wash water is sprayed on filter cloths trained about rollers positioned below the filter plates. In the device, wash water supply pipes having a plurality of spraying nozzles run parallel to the rollers, and have coupling means on at least one of their ends. Each coupling means has an inner diameter larger than the inner diameter of its respective water supply pipe, first and second communication ports and flexible pressure hoses for connecting neighboring coupling means to each other. The connection between neighboring coupling means is such that the first communication port of one coupling means is connected by a flexible pressure hose to the first communication port in another coupling means upstream and its second communication port is connected by another flexible pressure hose to the second communication port of yet another coupling means downstream.

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 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, e.g. for the manufacture of insulation products from an aqueous slurry, which has a number of movable platen portions. The platens have individual actuating means which are adjustable relative to one another but are controlled by a common drive which can move all the portions simultaneously as one platen.Also the method of using the press for the manufacture of insulation products. SUThe present invention relates to the manufacture of sheet or slab form insulation products from relatively free flowing slurries, for example containing calcium silicate and/or fibre. In particular it relates to a filter press which can be used to make such products. It also relates to a method of making sheet or slab form insulation products.Such products may be made by paper and/or board making techniques, they may also be made by filter pressing in which a measured volume of slurry is poured into a foraminous mould cavity and then de-watered by pressing.

Abstract: A sludge supply device for a single type filter press, wherein a sludge feeding nozzle is fitted in a recess in a side wall of a filter plate, with a filter cloth interposed therebetween, comprising a sludge supply pipe connected to said sludge feeding nozzle and at least two supporting rods carrying said sludge supply pipe and pivotally mounted on a retaining means attached to the side wall of the filter plate, said retaining means, said sludge supply pipe and said at least two supporting rods constituting a parallelogrammatical link mechanism, thereby maintaining said sludge feeding nozzle in a generally constant direction during the movement thereof. This invention facilitates the discharge of cake removed from the filter cloths and ensures smooth travelling of each filter cloth and easy washing thereof.

Abstract: A disc press for continuous pressing of aqueous or suspended pulp for fractionating the pulp in a liquid fraction and a dry substance fraction, comprises two plane parallel pressing discs mounted for rotation about a shaft and having strainer plates which haul the pulp therebetween by friction. The press also comprises inner and outer pressing means extending between the pressing discs and together with the latter define a curved pulp passage which in the transport direction has a varying cross section and constitutes a filling or dewatering zone, a pressing zone and a discharge zone. The passage zones of the pulp passage combined extend throughout an angle which is less than 360.degree., and the filling or dewatering zone has an approximately constant cross section. The subsequent pressing zone (B) has a uniformly decreasing cross section, the centerline of the pressing zone following an arc having an approximately constant radius about the axis of rotation.

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 press having a plurality of filter plates so supported between fixed and movable heads of the machine framework that the filter plates can selectively be separated from each other and compressed together to a substantially watertight closure between the fixed and movable heads. A filter medium is provided for each filter plate and is composed of a pair of filter webs covering respectively the opposed filtering surfaces of the filter plate. The filter webs are connected at their one end to a winding device and at their other end to a tensioning and winding roll assembly after having turned around a pair of juxtaposed guide rolls. Each tensioning and winding roll assembly is composed of a cylindrical roll and a biasing element for biasing the cylindrical roll in one direction with the filter webs forced to be wound therearound.

Abstract: A filter press with a novel spray washing arrangement for the filter plates which plates are shiftable on horizontal guides. The novel spray washing means comprises a carrier frame encompassing the stack of plates together with the horizontal guides and a spray pipe. The carrier frame is movable along the stack of filter plates at vertical, lateral struts. The spray pipe is equipped with spray nozzle and is guided as a unit movably up and down along the vertical struts. The spray pipe comprises two branch lines enclosing between them a filter plate that is to be spray washed. The spray nozzles of the two branch lines face each other to provide the same pressure on front and back surfaces of the filter plate.

Abstract: A plate-type filter press having filter plates suspended by centrally disposed support means is provided with a flushing unit insertable from below into the space between adjacent filter plates. Guide means are arranged in the proximity of at least one of the upper corners of the filter plates to prevent the plates from swinging relative to the support means and still permit insertion of the flushing unit between adjacent filter plates.

Abstract: A process and apparatus for operating a filter press having a sludge feed pump and a pressure tank in communication therewith wherein during filtration a quantity of sludge is withdrawn and stored in the pressure tank under a cushion of compressed air and wherein sludge is introduced under pressure from the pressure tank into the press during the next charging operation. A conduit having flow control means therein communicates the upper portion of the pressure tank with the press for injecting compressed air therein. The upper portion of the pressure tank also communicates with a compressed air supply conduit having flow control means therein which is controlled automatically as a function of the sludge level in the pressure tank.

Abstract: Disclosed is an improved filter of the type comprised of a series of stacked plate assemblies forming filter chambers adjacent to sheets of filter media between plate assemblies. The plate assemblies are constructed so that liquid can be rapidly removed from the filter chambers to prevent spillage when it becomes necessary to separate the plate assemblies and replace the filter media. Each plate assembly has an internal baffle system along one side having inlets for liquid to be filtered. The baffle system for each plate assembly deflects liquid coming into the chamber so as to prevent it from disturbing the filter cake, and it also allows substantially all of the liquid to be blown out of the chamber during a reverse flow "blow-down" procedure prior to separation of the plate assemblies.

Abstract: A filter press adapted to travel a filter cloth. Sludge is fed under pressure from mouthpieces into between double filter cloths put between a set of filter plates arranged side by side. The sludge is separated into filter cake and filtrate. The former remains between the double filter cloths and the latter passes through the filter cloth and is discharged from the side of the filter plates. The filter cake falls off the filter cloth when the filter plates are spread out to strain it.

Abstract: A plate filter composed of horizontal filter plates arranged in a vertical stack and each defining a fluid-tight partition and being provided with fluid flow channels at both its upper and lower faces, a plurality of frame members each disposed between a respective adjacent pair of filter plates, a pressing unit arranged to press the filter plates and frame members toward one another in a direction to close the filter, cloth guided by rollers to traverse a path extending past each face of each filter plate in the region between each such face and the frame member adjacent thereto, and a suspension arrangement composed of a chain of links supporting the filter plates and the frame members when the filter is open.

Abstract: A filter-dewatering-expression apparatus. Rotating helical blades of a screw conveyor compress and squeeze liquid from the sludge within structure which permits the liquid to escape therefrom, and discharge the dewatered solids out the end. The filter-dewatering medium which is held rigid by a frame may be a series of hoops or rings, separated and closely spaced, or may be a continuous wire, semicircular in cross section, closely wound into a coil, or may be a perforated screen. An imperforate filtrate collection housing surrounds this medium, and a vacuum pump is connected to the filtrate housing. A coil-spring wiping or cleaning blade may be held on the outside edge of the helical blade of the screw conveyor for continuous contact with the inside surface of the filter-dewatering medium, cleaning solids therefrom.