Abstract: In a lamination process, a method for changing the withdrawal of a top layer to be applied to a base material at a belt type press by feeding of the forward end of the top layer from a second roller to the rearward end of the top layer from a first roller. The top layer from the first roller is then cut off in coordination with the arrival of the forward end of the top layer arriving from the second roller, so that the ends of both top layers are positioned on the base material flush with one another with a slight separating line or in an overlapping manner.

Abstract: Apparatus for fabricating chip boards or fiber boards of cellulosic material, includes a press, and a press form station arranged upstream of the press and having a storage bin for retaining a material in the form of chips or fibers and a conveyor belt arrangement extending from an outlet end of the storage bin to a receiving end of the press, with the conveyor belt arrangement including a first section forming a vertical, funnel-shaped compaction zone aNd a second arcuate section arranged downstream of the first section for deflecting the material along a curved path from a vertical disposition into a horizontal disposition.

Abstract: A method of making plates or profiled workpieces from annual plants such as flax, straw, hemp, rice, reed, sugar cane, cotton stem, includes the steps of pressing plant parts of annual plants into bales after harvesting and completely wrapping the bales with a liquid-tight, vapor-permeable sheet. The wraped bales can then be stored until further processing which can be effected without subjecting the bales to an additional drying operation. Unsuitable plant parts such as dust, foreign matters and the like may be separated after harvesting from the useful plant parts before the latter are pressed to bales and wraped by a sheet.

Abstract: A double press for making and/or coating of web-shaped or plate-shaped workpieces of all types includes a reaction zone in which the pressure load of the workpiece passing through the press, and the intensity of the heat transfer or the heat removal are designed to be adjustable for individual products over an extended range. Between the pressing rolls (9) and the pressure plate (6), there are disposed bearing rollers (10) associated with the pressing rolls. A liquid pressure-transmitting medium flows turbulently in a short circulatory loop through the pressure chamber and a heating or cooling unit (13) located outside the pressure chamber. The double band presses can be employed in the furniture and electrical industry as well as in other branches of industry where laminated materials are used or processed.

Abstract: A method and device for continuously or discontinuously manufacturing flat sheets of multiple-layer materials, laminates, or similar articles for use in the furniture and electrical industries. In order to prevent molten resin from leaking out at the edges of layer of material while they are being bonded under heat and pressure, the free edges of the stacked layers of bonding material are welded together before the material is transformed into a composite sheet or composite web by heat and pressure.

Abstract: Apparatus for making laminates such as a wood panel, in particular a chip board or a fiber board or the like, includes a prepress having an inlet for receiving particulate material such as wood particles and adapted to form a pressing zone in which the wood particles are conducted initially in vertical direction and subsequently laterally deflected by 90.degree. along a curved path to form a material strand. The prepress includes two continuous conveyor belts that have upper substantially horizontal belt sections for receiving the particulate material and transporting material webs to the inlet. Extending downstream of the prepress is a main double-belt press for compacting the material strand and for formation of a laminate.

Abstract: A device for applying surface pressure to an advancing plate-shaped workpiece comprises two endless pressing belts positioned at two opposite surfaces of the advancing workpiece, and two pressure plates spaced from the respective pressing belts and forming pressure chambers containing pressure medium which presses the working strands of the pressing belts against the opposite surfaces of the advancing workpiece. Each pressure plate has a groove engaging an elongated hollow hose filled with the pressure medium and supported against the working strand of the respective pressing belt and limiting the pressure chamber.

Abstract: An arrangement for applying a surface pressure upon movable workpieces, has a rotatable pressing band with a working run applying a pressure against the workpiece, a pressure chamber formed by a part of the working run, a pressing plate, and a sealing member arranged on an edge of the pressing plate, and a lubricant supplying system including at least one lubricating nozzle formed in the sealing member and at least one lubricant discharge opening provided in the sealing member with its surface abutting against the pressing band.

Abstract: In a device for applying surface pressure to advancing workpieces like boards of wooden material etc. with at least one continuous compression belt against the inside of which a compression plate acts, several pressure chambers are distributed along the width and/or the length of the effective pressure surface of the belt. Each pressure chamber consists on the one hand of a sealing strip and on the other hand of the facing surfaces of the compression plate and of the compression belt. The sealing strips are resiliently secured against and can be released from the compression plate by a strip-like diaphragm that demarcates a pressure space.

Abstract: In a device for applying surface pressure to advancing workpieces like sheets of wood-based material and similar products with at least one revolving compression belt that a pressure plate acts on the inside of, several pressure chambers are distributed along the belt. Each chamber is constituted out of a holder that has a sealing strip. The holder and sealing strip are secured in such a way that they can be adjusted in a groove in the pressure plate by means of lateral guides constituted out of screws, adapters, or similar structures that are secured in such a way that they can be adjusted to the holder in the plane of the belt in such a way that deleterious horizontal displacement forces exerted by the belt on the sealing strip can be diverted into the pressure plate.

Abstract: In an apparatus for applying surface pressure onto advancing workpieces including at least one rotating pressing belt whose interior is acted on by a pressure plate, a plurality of smaller pressure chambers are arranged over the width of the effective pressure area of the pressing belt. Each one of these pressure chambers is divided into an inner pressure chamber and an outer pressure chamber so that the compressed air first builds up in the inner pressure chamber and then, with a delay, in the outer pressure chamber. Moreover, the inner fitting may be provided with a blocking device which temporarily blocks the supply of pressure medium to the outer pressure chamber.

Abstract: In an apparatus for applying a surface pressure to progressive moving workpieces comprising at least one rotating pressure belt having a workpiece carrying surface and an opposed surface and means for applying pressure to said belt to cause said belt to apply pressure to said workpiece, said pressure application means comprising a sealing strip in sealing abutment with said opposed surface of said belt, said sealing strip together with said belt forming part of a pressure chamber into which a pressure medium is induced the improvement comprising the provision of a plurality of pressure chambers over the length and width of said belt in its workpiece carrying region.