Abstract: The roller bar chains of a continuous press for producing pressed board provided sufficient play for the roller bars relative to the link chains by having the journaling pins for the link chains extending through bushings which articulate the overlapping link plates together, so that the outer diameters of the pins within these bushings are less than the inner diameters of the bushings. The result is that the roller bar chain has only a single guide plane in the press region between the two press plates.

Abstract: The roller bar chains of a continuous press for producing pressed board provided sufficient play for the roller bars relative to the link chains by having the journaling pins for the link chains extending through bushings which articulate the overlapping link plates together, so that the outer diameters of the pins within these bushings are less than the inner diameters of the bushings. The result is that the roller bar chain has only a single guide plane in the press region between the two press plates.

Abstract: The invention relates to a dispersion system for dispersing material, especially wood chips, wood fibres or similar, on a dispersing conveyor belt (1) in such a manner that groups of material (M) are formed during the production of chipboard, fibre-board or similar wood material boards. Said system comprises a dispersion material bunker (2) with a dosing unit (3) made from at least one dosing strip (4) and optionally, one or more dosing and/or disintegrating cylinders (5) for dispersing the material on one dispersion head (7) arranged on the end of the dosing unit and above the dispersing conveyor belt. The dispersion head is embodied in the form of a perforated dispersion head with a perforated base (8) and a plurality of agitating elements (9) are disposed at a predetermined distance above said base (8) and form a predetermined agitating width (B).

Abstract: A roller sifting or dispersing machine for the classification or dispersing of wood chips, fibers, or similar materials and to the utilization of an above-described roller sifting or dispersing machine. The roller sifting machine includes annular grooves and annular crosspieces. An outer sheathing surface of each annular crosspiece is provided with adjoining teeth in the circumference direction. The front tooth-side in the direction of rotation is steeper than the adjoining tooth back-side. The crosspiece and teeth of a roller also form a gradient that is opposed to the adjacent roller but has the same gradient height. The leading tooth sides of the circulating teeth create a pitching effect on the particles of the material to be sifted so that clogging of the roller set are avoided and an accelerated movement towards the exit end is achieved. By the continuous opposing movement of the teeth, clogging of these openings for the passage of chips is avoided.

Abstract: In order to preheat a particle mat having upper and lower faces and edges to a predetermined desired temperature for pressing into a pressed board air is conditioned to a temperature below 100.degree. C. and a moisture content together imparting to the conditioned air a dew point generally equal to the desired temperature. This conditioned air is simultaneously introduced from above and below at the same rate into the respective faces of the mat to produce in the mat a pair of horizontal and vertically approaching fronts at which moisture condenses out of the conditioned air. Introduction of the conditioned air into the mat is ended when condensed moisture and the conditioned air are forced out of the edges of the mat.

Abstract: A particle mat for pressing into a pressed board is heated by concurrently passing through the mat treatment air coming from an air-conditioning system and having a predetermined moisture content and dew point, heating the treatment air passing through the mat to a temperature which is greater by a dew-point differential than the dew point of the treatment air, and controlling the volume rate of flow of the treatment air and the moisture content of the treatment air such that the mat is preheated to a predetermined temperature while liquid in the treatment air is allowed to condense in the mat to at most a maximum liquid content.

Abstract: A continuous press for a compressible wood-product strand has a row of longitudinally spaced open frames, upper and lower heated press plates extending in a longitudinal direction through and supported by the frames, and respective upper and lower sheet-steel belts having respective lower and upper stretches extending longitudinally parallel to each other through the row of frames between the plates from the upstream to the downstream ends and defining a longitudinally extending passage having an upstream end, a downstream end, and a center between the ends. A drive advances the stretches longitudinally downstream and thereby draws in the wood-product strand longitudinally and compresses it transversely. Two sets of transversely displaceable downstream pressing elements transversely oppositely engageable between the center and the downstream end with the strand between the belts are displaceable longitudinally downstream synchronously with the strand.

Abstract: A continuous press for the production of pressed board comprises an inlet mouth of the steel belts, between which the comminuted material is pressed, which has its contour adjustable by imparting a bending moment to a cantilevered tongue of the respective press platen. The positions of the tongue are set by shifting a slider on the respective press beam to allow a step of a respective abutment staircase to engage a counter bar. The slide has a piston and cylinder setting drive.

Abstract: A press for making pressed board has a plurality of longitudinally spaced rigid frames, a lower press plate extending longitudinally through and secured to the frames, and a normally planar upper press plate extending longitudinally above the lower plate through the frames and defining with the lower press plate a longitudinally throughgoing press gap. A plurality of vertically effective double-acting hydraulic cylinders carried on the frames above the upper plate each have a back compartment and a front compartment, are connected to the upper plate, and support the upper plate on the frames. Respective upper and lower endless belts have respective lower and upper stretches extending through the gap immediately below and above the respective upper and lower plates and respective upper and lower rollers advance the stretches longitudinally through the frames. Sensors connected to the lower plate produce an output corresponding to the size of the gap.

Abstract: In this tiltable supporting roller bearing according to the invention for supporting a rotary drum there are provided a freely rotatably mounted supporting roller and an appertaining bearing structure which is tiltably supported with respect to a stationary foundation plate with the aid of easily shifted support bearings which are arranged inclined against one another in such a way that the point of rotation of the line of contact between the supporting roller and the riding ring of the rotary drum lies with the vertical central axis of the supporting roller. With a particularly simple and reliable design, this construction makes it possible to compensate for skewing of the rotary drum riding ring and at the same time markedly to reduce or largely avoid undesirable consequences of the axial forces resulting from longitudinal movements of the rotary drum.

Abstract: A belt press has a frame having horizontally extending and vertically spaced upper and lower plates defining a horizontally extending gap, respective upper and lower sets of drums rotatable on the frame, respective upper and lower endless belts spanned over the respective upper and lower sets of drums and each having a working stretch lying between the plates, and respective upper and lower sets of tubular rollers engaged between the working stretches and the respective plates. Respective upper and lower sets of rods traverse the respective rollers and are connected together as upper and lower endless chains. A drive connected to the drums advances the belts to move the working stretches horizontally in a transport direction to displace a workpiece in the direction through the gap and the plates are urged together with a pressure of between 300N/cm.sup.2 and 600N/cm.sup.2.

Abstract: A press for making pressed board has a plurality of longitudinally spaced rigid frames supporting a lower press plate extending longitudinally through the frames and having an upwardly directed upper surface and a downwardly directed lower surface. A layer of insulation upwardly directly engages the lower press plate and downwardly directly engages the press frames so that the lower press plate is supported via the insulation layer directly on the frames. An upper press plate extending longitudinally above the lower plate through the frames has a lower surface defining with the lower press plate a longitudinally through going press gap and a plurality of vertically effective hydraulic actuators are carried on the frames above the upper plate. A layer of insulation upwardly directly engages the actuators and downwardly directly engages the upper press plate so that the upper press plate is supported via the respective insulation layer directly on the actuators.

Abstract: The continuous press for hot pressing a mat as a step in making chipboard, fiberboard, laminated board and similar composite materials comprises heated platens, upper and lower pressing plates and press belts which are guided on roll rods in a pressing region which run between the heated platens and the press belts. The roll rods are guided over a guideway around the upper and/or lower pressing plate with the help of an upper and a lower roll rod circulating mechanism which has guide chains and a roll rod feed mechanism with entrance-end roll rod feed wheels. Roll shoes are located at the entrance end in the vicinity of the guide drums for the pressing belts and the roll rod feed mechanisms. The associated press belts are guided with the roll shoes. The roll shoes also have auxiliary rolls which are guided over another guideway and which are guided on the press belt side over shape-determining guide surfaces.

Abstract: A particleboard press for converting a thick mat into a thin panel has a frame, an upper beam and a lower beam carried on the frame and vertically confronting each another, respective upper and lower platens carried on the beams and vertically confronting each other, and respective upper and lower belts having stretches engaged under and over the upper and lower platens, respectively. The belts are synchronously driven so as to advance a mat in a transport direction through the press between the platens. One of the beams is vertically displaceable on the frame relative to the other beam and its platen has relative to the direction a downstream calibration portion and an upstream compression portion at least limitedly vertically displaceable relative to the one beam and the downstream calibration portion.

Abstract: A belt-type press for making particleboard has a longitudinal row of transverse frames through which pass upper and lower longitudinally extending press beams extending along and carried on the row of frames flanking respective heated press platens in turn flanking stretches of respective upper and lower belts driven to move a mat of particles to be pressed along the path in a transport direction. The upper beam is pressed down by a plurality of substantially identical hydraulic actuators to compress the mat between the belts with a relatively high pressure in an upstream compression region of the press and with a relatively low pressure in a downstream compression region of the press. The upper platen and beam have a downstream calibration portion and an upstream compression portion, the latter being elastically deflectable upward relative.

Abstract: A continuously operable belt-type press comprises two endless upper and lower press belts forming a pressing gap in a pressing region, an upper and lower platen, a drive mechanism and a press framework. In the pressing region two rod containers are positioned from which a plurality of rolling rods are fed with spacing from each other, these rolling rods being guided above the upper press belt and below the lower press belt by rod circulating mechanisms each comprising two synchronized first chains each guided over at least one sprocket and first chain drive wheel. In the entrance region of the pressing gap and of the upper and lower platens second chains are positioned over a second chain guide wheel. On the chain rollers of the second chains rolling rods are guided between the first chains and act similar to roller bearings.

Abstract: A continuously operable belt-type press for making particleboard, fiberboard and the like pressedboard products comprises an endless upper press belt circulated over at least one upper belt guide roller, a corresponding endless lower press belt circulated over at least one lower belt guide roller, these press belts forming a pressing gap in a pressing region, and a press framework having a lower and upper platen as well as a drive mechanism. The rod circulating mechanisms each comprise two first chains each guided over at least one sprocket and at least one first chain drive wheel with support bolts for connection of the rolling rods, chain link members with chain bolts therein, outer running rollers mounted on the chain bolts, and guide rails for the running rollers.

Abstract: A press for compacting comminuted material in the manufacture of pressedboard comprising a pair of steel pressing bands which are backed up in the pressing zone by roller bodies on endless chains carried through this zone between respective press platens and the bands. The chains have links which are folded into a zigzag configuration as they enter the zone and are drawn out into an extended configuration outside the zone.

Abstract: A central station of a belt-type particleboard press, serving to compact a prepressed mat of wood particles and binder prior to its conversion into particleboard in a final station, comprises a multiplicity of mutually identical frame elements with aligned windows traversed by a pair of platens bracketing upper and lower stretches of two conveyor belts between them, these belt stretches entraining the mat along a horizontal path. The frame elements form supports spaced along the path, each support consisting of one or more such elements and carrying a group of hydraulic rams acting upon the upper platen to place the mat under a pressure which peaks in an upstream zone, decreases in an intermediate zone and levels off in a downstream zone of its path.

Abstract: A press comprises a drum having a heated outer surface and rotatable about an axis and at least one endless belt radially juxtaposed with a portion of the outer drum surface and consisting mainly of an elastically deformable matrix and a plurality of parallel, twisted, and generally annular multifilament cords axially spaced from one another and formed of yarns of an aromatic polyamide imbedded in the matrix. The belt is tensioned and thereby urged radially toward the drum-surface portion. Thus the belt and the drum-surface portion form an angularly extending pressing region. A web to be compressed is fed tangentially to one end of the pressing region and is withdrawn it from the other end thereof. A drive rotates the drum and thereby displaces the web and the belt angularly along the portion so that the web is compressed against and heated by the drum. The cords according to this invention are formed as cables.