Abstract: A machine for making plastic tubing including a plurality of separate carriages for carrying mold blocks about the continuous path. First and second wheel pairs on opposite sides of each carriage ride on first and second tracks respectively through a molding section of the path. An offset wheel is disposed between the wheels of each pair and rides on guide tracks associated with and facing oppositely to the first and second tracks respectively through the molding section.

Abstract: The invention is directed to an apparatus for the production of plate-sha bodies from a mixture of plaster and fibrous materials. The apparatus has a conveying means, spreading means, a first and second press, an afterwetting station and a setting and drying station. The afterwetting station is located between the first press and the second press and has separate means for wetting the upper side and the underside of a raw board being processed. The separate wetting means can be independently controlled.

Abstract: Continuous impression forming of three-dimensional products from heated, formable thermoplastic materials between top and bottom mold carriages each having a three-dimensional forming belt mold revolvable around the carriage. Each three-dimensional forming belt mold includes a flexible silicone rubber mold adhered to a multi-ply woven fabric belt. A surface of desired shape on one revolving rubber mold mates with the desired shape of an opposed revolving rubber mold forming a continuously moving mold channel between the mold belts into which is fed hot thermoplastic material at moldable temperature. After discharging molded plastic product from the exit of the moving mold channel, localized surface heat in the rubber molds resulting from contact with hot plastic is removed by air blown directly onto the rubber mold surfaces. Each carriage frame includes a back-up plate coated with low friction coefficient material over which slides a continuously moving belt mold.

Abstract: A method for the continuous production of boards made from feedstock includes A) providing a continuously operating press with an entry adjustment device being movable to define a variable angle entry gap through which the board passes such that the board is subject to compression forces, the variable angle entry gap defined by at least first and second independently variable angle entry gap portions, the first and second portions being flexibly connected and the second portion being flexibly connected at least to one of the heating plates of the press table and press ram; B) moving the feedstock through the variable angle entry gap; C) setting the first independent variable entry gap at a first angular value which falls in a first range from approximately 0.5.degree. to approximately 5.0.degree.

Abstract: An apparatus for forming venting channels in a continuously-formed foam product includes a plurality of channel-forming plates which are removably attachable to the upper endless-type conveyor of a rigid foam laminating apparatus. The channel-forming plates provide a molding surface to form transverse channels in the foam product during the foaming operation. The channel-forming plates are easily removed for repair and/or replacement and include a centering bar which accurately positions each plate on the endless conveyor. The channel-forming plates are configured to form generally U-shaped channels in the upper surface of the continuously formed foam product to provide venting channels when the foam product is cut and used in roof insulation. The product and venting channels therein are sized to provide a continuous channel when a plurality of the foam panels are used as well as to facilitate attachment to standard trusses or joists.

Abstract: Method and apparatus for manufacturing a sheet-prepreg reinforced with fibers wherein a sheet of fibers such as warp or woven fibers such as fabrics is conveyed between a pair of band belts one of which is coated with a film of thermoplastic resin which has been heated higher than its softening point to enhance resin-impregnating efficiency and prevent the impregnated resin from contacting air. Further, when the sheet of fibers or woven fibers is conveyed in this manner, the molten resin is not maintained on the manufacturing line, thereby preventing it from being deteriorated by heat. The apparatus can be thus kept under operation for a long time and the sheet-prepreg reinforced with the fibers can be made much higher in quality and the deterioration of the impregnated resin can be further delayed.

Abstract: A process for the production of particulate board from a matrix of flake or particles mixed with a cementitous material includes the steps of continuously feeding the matrix into a press, applying at least one of steam and gas or gases to the matrix to cure same to form the particulate board, and removing steam and gas or gases therefrom by vacuum assistance. The apparatus includes press and diffusion belts, which guide the matrix through a nip, where it is compressed into particulate board. Upon exiting from the apparatus, the boards so produced are cut into predetermined lengths.

Abstract: A continuously working press includes first and second flexible, endless steel belts which are guided around a press table and a press ram via drive drums and return drums and which are supported on a plurality of roller bars. Each of two entry systems has an entry area which extends from an entry tangent to a starting point of a high pressure area and which is divided into a roller bar orientation area, a curved precompression area for the material to be pressed, and a straight compression area. The last third of the roller bar orientation area and all of the precompression area of each of the entry systems have a radius of curvature R.sub.E which is between one and two times the radius of curvature of the return drums R.sub.U. A plurality of computer-controlled hydraulic supporting members support the first and second entry systems and apply a pressure to the material to be pressed. The applied pressure increases constantly from 0 bar at the entry tangent up to a maximum pressure HP.sub.

Abstract: A method for the continuous production of boards made from feedstock includes A) providing a continuously operating press with an entry adjustment device being movable to define a variable angle entry gap through which the board passes such that the board is subject to compression forces, the variable angle entry gap defined by at least first and second independently variable angle entry gap portions, the first and second portions being flexibly connected and the second portion being flexibly connected at least to one of the heating plates of the press table and press ram; B) moving the feedstock through the variable angle entry gap; C) setting the first independent variable entry gap at a first angular value which falls in a first range from approximately 0.5.degree. to approximately 5.0.degree.

Abstract: Process for producing fiber-reinforced thermoplastics in a double-belt press in which the lateral sealing of the press space is formed from a porous profile which is mechanically supported against being laterally forced out and moistened with water before it enters the press.

Abstract: A heat sealing machine for sealing layers of a plastic film to each other. The machine includes a pair of flexible, endless opposed heat transfer bands each fronting each other and having a gap therebetween wherein layers of plastic film travel for sealing. Heat sealing components such as heat sealing bars in communication with the heat transfer bands and disposed behind the heat transfer bands are provided with constraints for limiting the inwardly-lateral movement thereof to thereby restrict movement thereof such that a bar does not travel beyond the longitudinal mid-line of the gap. In this manner, varying thicknesses of layers of plastic to be sealed can be accommodated without misalignment and jamming.

Abstract: A apparatus for continuously casting a liquid thermoset resin or composition in which a liquid thermoset resin or composition is fed into a space defined between a pair of moving endless belts arranged such that the lower run of the upper belt is disposed above the upper run of the lower belt; the adjacent runs of the belts are moved concurrently with each other at substantially the same speed and a first fluid container is provided above the upper belt with its lower surface in contact with the lower run of the upper belt. A second fluid container is provided below the lower belt with its upper surface in contact with the upper run of the lower belt. The fluid in the first fluid container is maintained at a first desired temperature and the fluid in the second fluid container is maintained at a second desired temperature. The lower run of the upper belt is maintained in contact with the lower surface of the first fluid container whereby the lower run of the upper belt is held up without any substantial sag.

Abstract: The invention is directed to a continuously operating double band press for fabrication of laminates, chip,- or fiberboard, plywood or the like. The double band press comprises an upper and a lower endless press band conducted over respectively two reversing drums rotatably supported in a rigid press stand. Pressure chambers are arranged on the inner sides of the press bands, which are bounded in a vertical direction by a pressure plate fastened in the press stand and the press band and in a horizontal direction by floating seals. A pressure generated by fluid agents acts in the pressure chambers upon the press bands. Heat-conducting elements are arranged in the pressure chamber for heating or cooling the press bands. These heat-conducting elements comprise a body in which means for heating or cooling the heat-conducting elements are provided.

Abstract: A formed piece continuous manufacturing apparatus formed by four endless belts. At least three of the endless belts are movably supported by a movable device, and the sectional shape of the forming passage is freely controlled by arbitrarily moving at least three endless belts.

Abstract: A continuously working press is disclosed which includes first and second flexible, endless steel belts which are guided around a press table and a press ram via drive drums and return drums and which are supported on a plurality of roller bars. Each of two entry systems has an entry area which extends from an entry tangent to a starting point of a high pressure area and which is divided into a roller bar orientation area, a curved precompression area for the material to be pressed, and a straight compression area. The last third of the roller bar orientation area and all of the precompression area of each of the entry systems have a radius of curvature R.sub.E which is between one and two times radius of curvature of the return drums R.sub.U. A plurality of computer-controlled hydraulic supporting members support the first and second entry systems and apply a pressure to the material to be pressed. The applied pressure increases constantly from 0 bar at the entry tangent up to a maximum pressure HP.sub.

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: An apparatus and method are provided for guiding steel bands of a continuously operating press about a longitudinal axis during operation of the press without overstretching one side of the steel bands. First and second bands are guided, via driving drums and return drums, around a pressing ram and a pressing table, respectively. The steel bands are supported, with an adjustable pressing gap, on a plurality of co-rotating steel rods which are guided, with their axes of rotation extending transversely to the direction of travel of the bands, against abutment lugs of the table and the pressing ram. The axis of at least one of the drums is altered in a first direction through an angle .alpha..

Abstract: An apparatus for flattening and, if desired, rolling of portioned dough pieces has a head machine that delivers dough pieces to conveyor belts by which the dough pieces are conveyed to a first endless running belt. This belt constitutes the support for a flattening station that flattens the dough pieces. By this first endless running belt the dough pieces are conveyed to a further endless running belt disposed below the first band said second band conveying the dough pieces back again towards the head machine. Thereby the overall length of the apparatus is shortened. The two belts constitute a further processing station for the dough pieces. If the two belts run with the same speed, the dough pieces are further flattened or, if the two belts show different speeds, the dough pieces are rolled.

Abstract: Continuous impression forming of three-dimensional products from heated, formable thermoplastic materials between top and bottom mold carriages each having a three-dimensional forming belt mold revolvable around the carriage. Each three-dimensional forming belt mold includes a flexible silicone rubber mold adhered to a multi-ply woven fabric belt. A surface of desired shape on one revolving rubber mold mates with the desired shape of an opposed revolving rubber mold forming a continuously moving mold channel between the mold belts into which is fed hot thermoplastic material at moldable temperature. After discharging molded plastic product from the exit of the moving mold channel, localized surface heat in the rubber molds resulting form contact with hot plastic is removed by air blown directly onto the rubber mold surfaces. Each carriage frame includes a back-up plate coated with low friction coefficient material over which slides a continuously moving belt mold.

Abstract: An apparatus and method are provided for guiding steel bands of a continuously operating press about a longitudinal axis during operation of the press without overstretching one side of the steel bands. First and second bands are guided, via driving drums and return drums, around a pressing ram and a pressing table, respectively. The steel bands are supported, with an adjustable pressing gap, on a plurality of co-rotating steel rods which are guided, with their axes of rotation extending transversely to the direction of travel of the bands, against abutment lugs of the table and the pressing ram. The axis of at least one of the drums is altered in a first direction through an angle .beta..

Abstract: An apparatus for deforming a pipe includes a boxed structure having an entry and exit for the pipe. The boxed structure acts as a constraint on a peripheral of the pipe along a path of movement thereof. An elongate wedge member depends inwardly from the boxed structure and is arranged in use to lie alongside the path of movement of the pipe and to project increasingly into the pipe as the pipe moves past the wedge member in a forward direction in the path of movement. The pipe to be deformed in the path of movement is engaged progressively increasingly by the wedge member whereby to indent progressively a part of the peripheral wall of the pipe such to deform the pipe longitudinally in the path of movement with the pipe through the boxed structure.

Abstract: A continuously operating double band press for the production of material webs, a shape compensating plate and a discontinuously operating single or multiple-platen press for the production of materials in portions is disclosed. Shape compensating plates are arranged in the press frame of the double band press or at the pressing plates of the platen press. The shape compensating plate comprises two plates of metal which are parallel arranged. An elastic bellows serving as a lateral seal is fastened at its edge to extend annularly. The chamber formed by the plates and the elastic bellows is filled with a fluid medium.

Abstract: A highly compressed covering material is fabricated by pressing a lumpy plastics material or plastics pre-product. The plastics material or plastics pre-product is thereby fed into a double-belt press by continuously and dosedly feeding the plastics material or plastics pre-product into a region formed by lateral delimiting elements at the lower belt of the double-belt press. The continuous pressing to form the highly compressed covering material is accomplished there during heating and with increasing pressure.

Abstract: Extruded, smooth finished solid sheet or film, which may have a thickness<1 mm, of a thermoplastic plastic (such as polycarbonate) with a glass transition temperature >50.degree. C., which under conditions of orientation displays optical birefringence, may be manufactured into a flat strip with smooth finished surfaces, to yield a strip which has characteristics as follows:optical birefringence path difference less than or equal to 50 nm (single pass);low surface roughness;low variation in thickness;by extrusion of the plastic in a thermoplastic state, through a slot nozzle;wherein during or after the smoothing of the two surfaces one of the surfaces of the strip is cooled to below the glass transition temperature, while the other surface and the predominant part of the interior region of the strip remain in the thermoplastic state and the strip is cooled to below the glass transition temperature, under conditions which minimize the deforming forces on the surfaces of the extruded strip.

Abstract: In a double-belt press used to produce wood chip boards and the like, narrow edge strips of the filling are vacuumed off at the edge (32) of the filling (33) producing the boards (33), leaving tabs (37) in place. (FIG. 5 ).

Abstract: A method and apparatus for making structural panel from the rinds of sugarcane and similar woody grasses. The method includes providing a collection of straight and rather long rind fiber-bundle strands, coating them with binder, depositing coated strands in a loose pile with the strands randomly oriented in substantially parallel planes, pressing the pile to a final thickness, and curing to interconnect each strand with others. The curing step preferably includes moving air through the pile, which had been deposited on a perforated belt and pressed between a pair of such belts.

Abstract: A device and method of producing a multi-layer film composite is provided. In accordance with the device and method, a temperature-controllable or heatable roll serves as a sealing tool, on the circumferential surface of which a number of plastic film webs are sealed together under the application of pressure and heat. The plastic film webs come into contact with the circumferential surface of the roll at equal or varying distances from each other and are guided over pressure rolls. These pressure rolls are in contact with the circumferential surface of the heatable roll under pressure. The plastic film webs pass through the gaps between the pressure rolls and the heatable roll. The plastic film webs are alternately sealing layer-free or provided on one or both sides with sealing layers, which are fused by the action of heat, so that sealing of the laminated plastic film webs on the circumferential surface of the heatable roll occurs.

Abstract: An apparatus for producing croissants with fillings includes a filling-depositing stage for depositing a filling on a croissant dough piece that is being conveyed in a downstream direction, a rolling-up preparation stage positioned downstream of the filling-depositing stage for raising the croissant dough piece at its leading edge and simultaneously turning the leading edge backward to be folded in the upstream direction to thereby cover the filling, and a rolling-up stage positioned downstream of the rolling-up preparation stage for rolling up the croissant dough piece.

Abstract: A continuously operating double band press for fabrication of laminates , chip- or fiberboard, plywood or the like has an upper endless press band and a lower endless press band wound over respectively two reversing drums rotatably supported in a rigid press stand. Pressure chambers are arranged at the inner sides of the press bands, which are bounded in vertical direction by pressure plates fastened in the press stand and the press bands and in horizontal direction by floating seals. A pressure produced by fluid agents acts in the pressure chambers. Elements are arranged in the pressure chambers provided with a body and projecting individual surface enlargement members. The projecting individual the surface enlargement members consist of a material having good thermal conductivity and protrude into the fluid pressure agent located in the pressure chamber and have a good thermal conducting contact with the body of the element.

Abstract: An apparatus and method are provided for guiding steel bands of a continuously operating press about a longitudinal axis during operation of the press without overstretching one side of the steel bands. First and second bands are guided, via driving drums and return drums, around a pressing ram and a pressing table, respectively. The steel bands are supported, with an adjustable pressing gap, on a plurality of co-rotating steel rods which are guided, with their axes of rotation extending transversely to the direction of travel of the bands, against abutment lugs of the table and the pressing ram. The axis of at least one of the drums is altered in a first direction through an angle .beta..

Abstract: A method and apparatus are provided for guiding first and second bands of a continuously working press via driving drums and return drums around a pressing ram and a pressing table, respectively, while supporting the steel bands, with an adjustable pressing gap formed therebetween, on a plurality of co-rotating steel rods which are guided with their axes of rotation extending transversely to the direction of travel of the bands. A device is provided for realigning the first steel band with respect to a longitudinal center-line of the press and the pressing table. The realigning step includes the steps of relieving pressure in short-stroke pressure cylinders located in a high-pressure region of the press, and then horizontally rotating the pressing ram and those pressure rollers and pressure drums which are connected to the pressing ram through an angle .alpha. about a vertical axis of rotation which is located on the longitudinal center-line of the press.

Abstract: Continuous process and apparatus form products from thermoplastic materials between top and bottom mold carriages. A flexible silicone rubber mold on a fiber belt continuously moves around each carriage frame. A surface of desired shape on one rubber mold mates with the desired shape of an opposed rubber mold forming a continuously moving mold channel into which is fed hot thermoplastic material at moldable temperature. After discharging the molded plastic product from the moving mold channel, localized surface heat in the molds resulting from contact with hot plastic is removed from the belt molds by air blown onto mold surfaces. Each carriage frame includes a back-up plate coated with low friction coefficient material over which slides a continuously moving belt mold. These slippery plates have numerous air-bearing holes feeding high pressure air between them and the respective moving fiber belt for reducing friction and wear.

Abstract: A lubrication system for a continuously operating press for the pressing of a multi-ply board web (119) of pre-manufactured material has a press gap defined between upper and lower runs of endless recirculating steel press bands (105). A slide coating (101) which extends over the width of the press zone is provided with grooves. Each press band (105) slides by means of a lubricant which is supplied into the slide coating via supply lines and is led away through discharge openings. Several grooves (107, 108, 110, 111) for the swirling of the lubricant are provided for the press band (105) at least in the two outer longitudinal edge regions of the slide coating.

Abstract: In a double belt press, in which the steel belts are supported on the back by rollers, inherent compressive stress occurs on the side of the steel belts of a double belt press that are supported on the back by rollers, resulting in an undesirable bowl-shaped deformation of the steel belts. In order to avoid this deformation, at least the side of the steel belts which faces away from the rollers is subjected to treatment by shot blasting before being installed in the double belt press.

Abstract: An apparatus for and a method of manufacturing a fiber reinforced thermoplastic sheet-shaped molding including a pre-impregnating process and a final impregnating process. A sheet of thermoplastic resin and a web of reinforcement fibers are supplied through the pre-impregnating process during which the thermoplastic resin is sucked under the influence of a suction force so as to partially penetrate into interstices in the reinforcement fiber web while both are transported around and by a perforated rotary drum, thereby to form a first preformed sheet. The first preformed sheet is subsequently supplied to the final impregnating process during which an impregnating machine is employed. As the first preformed sheet is passed through the impregnating machine while compressed inwardly and heated, the thermoplastic resin is allowed to completely penetrate into the interstices in the reinforcement fiber web to complete the fiber reinforced thermoplastic sheet-shaped molding upon cooling thereof.

Abstract: A continuously operating press includes a press table, a press ram facing the press table, first and second flexible endless steel bands which transfer a pressing pressure to and draw a material to be pressed through an adjustable pressing gap, and driving drums and deflecting drums which drive the first and second endless steel bands around the press table and the press ram, respectively. Rolling bars are disposed with their axes being transverse to the running direction of the steel bands and extending over the entire working area of the press. Heated platens are attached to the press table and press ram, respectively, with the rolling bars rolling on the heated platens. The heated platens have end surfaces which are connected to one another via straight butt joints. The heated platens also have bore holes formed therein which extend parallel to the longitudinal direction of the press and which are independently heatable to provide a plurality of heating surfaces in each of the heated platens.

Abstract: An apparatus is disclosed for producing a continuous belt-like sheet of bread dough. The apparatus includes a dough hopper, vertical conveyors mounted on the facing side walls of the hopper, a dough outlet provided at the bottom of the hopper, and a pair of discharging rolls constituting part of the dough outlet, facing each other, and which are rotated so as to downwardly pass the bread dough passing therebetween. The width of the outlet and the peripheral speed of the discharging rolls are controllable so that a high-quality sheet of bread dough is continuously produced, while the gel structure of the dough is maintained uninjured.

Abstract: Method and apparatus for manufacturing a sheet-prepreg reinforced with fibers wherein a sheet of fibers such as warp or woven fibers such as fabrics is conveyed between a pair of band belts one of which is coated with a film of thermoplastic resin which has been heated higher than its softening point to enhance resin-impregnating efficiency and prevent the impregnated resin from contacting air. Further, when the sheet of fibers or woven fibers is conveyed in this manner, the molten resin is not maintained on the manufacturing line, thereby preventing it from being deteriorated by heat. The apparatus can be thus kept under operation for a long time and the sheet-prepreg reinforced with the fibers can be made much higher in quality and the deterioration of the impregnated resin can be further delayed.

Abstract: According to the present invention, a polyolefin sheet, film or fiber having a high strength and a high modulus can be continuously produced by:feeding an ultra-high-molecular-weight polyolefin powder between a pair of upper and lower endless belts opposed to each other,conveying the polyolefin powder between the endless belts under compression to compression-mold the polyolefin powder at a temperature lower than the melting point of the polyolefin powder, the compression being continuously and smoothly effected, via the endless belts, by a pressing means comprising two sets of rollers which are arranged at the back sides of the endless belts so that each one roller of the two roller sets faces each other and each of which rollers is rotatably supported at the shaft ends by a frame, and thenrolling and stretching the resultant compression-molded polyolefin in this order.

Abstract: Apparatus for forming fins along a web of metallic material utilizing first and second opposed endless chains, and with the first chain adapted to support the web of metallic material thereon, and comprising a plurality of spaced-apart anvil links. The upper chain includes a plurality of spaced-apart links operating in registry with the base chain and including work-engaging, fin-forming lugs which enter the gap between mutually adjacent anvil links. The apparatus further includes a chain-deflecting idler roll which deflects the base chain arcuately away from its normal plane so as to effectively reduce the spacing between adjacent anvil links and create a web back-breaking zone for achieving a firm and solid crimping of that portion of the web forced thereinto by the fin-forming lugs.

Abstract: A belt press has horizontally extending and vertically spaced upper and lower plates defining a horizontally extending gap, vertically spaced upper and lower upstream drums rotatable about respective horizontal drum rotation axes at the upstream press end, and vertically spaced upper and lower downstream drums rotatable about respective horizontal drum rotation axes at the downstream press end. Each of the downstream drums is supported for at least limited pivoting about a vertical axis generally intersecting the respective drum rotation axis. Upper and lower endless belts spanned over the respective upper and lower drums each have a working stretch lying between the plates and a return stretch.

Abstract: A flat extrusion method for manufacturing especially multilayer panels and device for working the method. The method consists of the following method steps: simultaneous addition of mixtures by mixing and spreading devices (1) into a perpendicular conically tapered shaft (A, B) formed by circulating compression belts (13, 14); compression of the mixture by the conical design of shaft (B), followed by traversing a section (C) in which the compression belts are arranged parallel to one another and at a distance which corresponds to the thickness of the finished panel strand; curing of the mixture in the downstream calibrating section (3).

Abstract: A portable perimeter pressure sealer for sealing pressure sensitive adhesive strips along perimeter edges of a business form includes two pair of sealer wheels, the upper wheel of each pair being angularly movable relative to the lower wheel of each pair to insure uniform application of sealing pressure to a form passing therebetween. The upper wheels have peripheral pressure sealing surfaces which are biased into non-parallel relationship when no form is present between the respective sealer wheel pairs, but which are forced into a parallel relationship upon introduction of a form between the nips of the respective roll pairs.

Abstract: A method and apparatus are provided for guiding first and second bands of a continuously working press via driving drums and return drums around a pressing ram and a pressing table, respectively, while supporting the steel bands, with an adjustable pressing gap formed therebetween, on a plurality of co-rotating steel rods which are guided with their axes of rotation extending transversely to the direction of travel of the bands. A device is provided for realigning the first steel band with respect to a longitudinal center-line of the press and the pressing table. The realigning step includes the steps of relieving pressure in short-stroke pressure cylinders located in a high-pressure region of the press, and then horizontally rotating the pressing ram and those pressure rollers and pressure drums which are connected to the pressing ram through an angle .alpha. about a vertical axis of rotation which is located on the longitudinal center-line of the press.

Abstract: A mat of reinforcement material, such as glass fiber reinforcement material, is manufactured by forming a layer of continuous strand or chopped fibers on a conveyor belt and conveying the layer along a defined path. At a location downstream of the application of the layer, the layer of fibers is coated with a binder in the range of 2.0-10.0 weight percent, either a microwave-sensitive binder or an ultraviolet-sensitive, binder and the binder-coated layer is fed into a radiation tunnel which includes a compression stage and a curing stage. In this radiation tunnel, the binder-coated layer is compressed to a desired density-thickness ratio and cured, the compression and curing occurring in stages, and the resulting mat is taken from the conveyor belt and wound up for storage.

Abstract: Continuous process and apparatus form products from thermoplastic materials between top and bottom mold carriages. A flexible silicone rubber mold adhered to a fiber belt continuously moves around each carriage frame. A surface of desired shape on one rubber mold mates with the desired shape of an opposed rubber mold surface forming a continuously moving mold channel into which is fed hot thermoplastic material at moldable temperature. After discharging the molded plastic product from the moving mold channel, localized surface heat in the molds resulting from contact with hot plastic is removed from the belt molds by blowing cold air onto mold surfaces. Each carriage frame includes a back-up plate coated with low friction coefficient material over which slides a continuously moving belt mold. These slippery plates have numerous air-bearing holes feeding high pressure air between them and the respective moving fiber belt for reducing friction and wear.

Abstract: An installation for the production of sheet-like members from a mixture of plaster and fibrous material comprises, in addition to a device which prepares the raw materials and mixes them in the dry state in a desired ratio, as well as a device, which adds and mixes in an accurately dosed quantity of water, a spreading device, which spreads a mat of material on a forming line. The mat of spread-out material is compacted in a continuously operating belt press. The latter comprises in known manner two endless steel belts, which are guided around two movable press plates of the belt press, which are spaced apart. The mat of spread-out material is compacted between the forming line, on which it rests, and an endless-belt screen, which bears on the upper steel belt of the belt press and thus acquires a side marked by the endless-belt screen. After being cut up by a cutting device, the individual sheets are turned through 180.degree.

Abstract: A method of and apparatus for continuously fabricating laminates formed of several layers of resin-impregnated material webs is carried out in combination with a double band press including a pair of endless press bands forming a pressing zone. Material webs free of resin are removed from a source and placed on a stretch of the run of at least one of the endless press bands at a location between a press outlet and a press inlet, and spaced from the pressing zone. The impregnation and drying of the resin takes place at least partially on the stretch approaching the press inlet, that is, before the pressure molding takes place. At the press inlet, the material webs are placed together forming a layered member and then are pressure molded, heated and/or cooled between coextensive stretches of the endless press bands to form the laminate. The resin is applied to the material webs from a resin applying device located between the press outlet and the press inlet outside of the pressing zone.

Abstract: A method of and apparatus for continuously fabricating laminates formed of several layers of resin-impregnated material webs is carried out in combination with a double band press including a pair of endless press bands forming a pressing zone. Material webs free of resin are removed from a source and placed on a stretch of the run of at least one of the endless press bands at a location between a press outlet and a press inlet, and spaced from the pressing zone. The impregnation width and drying of the resin takes place at least partially on the stretch approaching the press inlet, that is before the pressure molding takes place. At the press inlet, the material webs are placed together formed a layered member and then are pressure molded, heated and/or cooled between coextensive stretches of the endless press bands to form the laminate. The resin is applied to the material webs from a resin applying device located between the press outlet and the press inlet outside of the pressing zone.

Abstract: The present invention is directed to improvements in apparatus and proces for the continuous production of inorganically bonded materials, the apparatus and process providing a pressureless transition zone without the action of pressure on a continuous sheet of material arranged between a high-pressure compression unit and the calibrating unit, and where the calibrating unit is immediately preceded by a recompression unit, which applies an active pressure on the continuous sheet of material after it passes through the pressureless zone and before it enters the calibrating unit and where this active pressure is sufficiently high that the nominal thickness of the continuous sheet of material is equal to or less than the finished continuous sheet of material and nominal density of the continuous sheet of material are equal to or greater than the density of the finished continuous sheet of material.