Abstract: Veneer cutter, wherein the cutting is provided by a blade, the front rake face thereof being movable to pass a stationary counter blade, substantially in a perpendicular direction to the plane of the veneer. The cutter includes two blades in a common cutting movement and arranged at a distance from each other in the feed direction of the veneer. The cutting blades are located with their front rake faces facing away from each other, and the first blade in the feed direction is positioned at a higher elevation from a common plane of the counter blades than the second blade.

Abstract: Apparatus for applying glue to veneer sheets comprises elements (6, 7, 8) for transporting veneer sheets (3), supported substantially in a horizontal position, to the gluing, a glue applying device (2) for administering glue onto the veneer traveling under it, as well as elements (9, 10, 11) for directing the glued veneers (4), supported substantially in a horizontal position, to a further processing, said conveying elements being located with respect to each other so as to leave in the direction of transport a transfer gap aligned with the glue administering device (2). The device further includes means for forcing the veneer to be glued and the glued veneer at its center portion in the direction of transport to a different level than the edge portions thereof in the direction of transport.

Abstract: An apparatus for applying glue onto a moving, plane object comprises inlet pipes of the glues a dispenser extending across the path of travel of the object of the dispensing, dispensing nozzles of the glue and means for controllably opening and interrupting the glue flow to the nozzles. The means for interrupting the flow comprise a cylindrical case formed into the frame of the dispenser, extending along the total length thereof, inlet channels for the glue leading to the case, nozzle channels leading out from the case and a pipe element mounted into the case with a sliding fit, said pipe element being equipped with openings for forming a flow connection between the inlet channels of the glue and the nozzle channels in one position of the pipe element with respect to the frame and for closing said flow connection in the second position of the pipe element with respect to the frame.

Abstract: The invention concerns a method for peeling veneer from a log, wherein the centering device is calibrated during the peeling process without interrupting the production. In the method in accordance with the invention, the around-contour of the log is defined by means of techniques of prior art in the centering device by measuring the distance between the surface of the log and the rotation axis at several positions at the length of the log, and the rotation centres of the ends of the log are set to the chucks of the lathe in accordance with this determination of contour. The validity of the centering is controlled, and a correction factor for the centering of a next log is transmitted to the apparatus commanding the centering device.

Abstract: An apparatus for heating a board product containing glued wood is disclosed. The apparatus includes a heating chamber through which the board product passes. The board product passes through a heating field in the heating chamber provided by means of microwave energy applied perpendicular to the board plane. The clearances between respective side edges of the board and side walls of the heating apparatus are filled by slide pieces made of a material that has a small loss tangent and a low dielectric factor. The slide pieces correct the form of the heating field affecting the board plane.

Abstract: The invention relates to a method and a device for foaming glue for the production of wood-based sheets. Gluing substance and gas are fed (1,2) into the foaming device through nozzles (3,4), which are directed to mix the gluing substance and gas to be fed to form an essentially homogenous mixture prior to foaming. After this the gluing substance is foamed mechanically in the foaming chamber (5) with the aid of gas.

Abstract: A pressing apparatus for continuous pressing of panels, which apparatus consists of two pressure chambers juxtaposed with a vertical clearance. Each of the chambers occupying a platen in a sealed sliding contact to the vertical inner side walls of the chamber. The mutual distance of the platens define the clearance. A transport band is in sliding contact to the platen of each chamber. The chambers are pressurized. The platen edges in contact with the band are provided with a seal having a protrusion directed towards the middle area of the platen, and means are provided to exert and maintain a pressure in the volume defined by the platen, the band and the seal.

Abstract: The invention concerns a method for optimizing the veneer yield in veneer peeling. The contour of the log to be peeled is determined and the peeling axes at the ends of the log are determined by simulating the veneer yield. The desired veneer yield is determined at least as two veneer products having their own grades. These desired veneer products serve as basic values for the optimizing calculation. The maximum grade of the veneer yield is calculated, based on the dimensions and grades of the veneer products, as well as by iterating the places of the peeling axes and simulating the peeling process. When the peeling axes of the log ends giving the maximum grade yield have been found, the log is placed according to these peeling axes in the lathe and peeled into a veneer web to be cut with a clipper into said desired veneer products.

Abstract: The invention concerns a method for peeling veneer from a log, wherein the centering device is calibrated during the peeling process without interrupting the production. In the method in accordance with the invention, the around-contour of the log is defined by means of techniques of prior art in the centering device by measuring the distance between the surface of the log and the rotation axis at several positions at the length of the log, and the rotation centres of the ends of the log are set to the chucks of the lathe in accordance with this determination of contour. The validity of the centering is controlled, and a correction factor for the centering of a next log is transmitted to the apparatus commanding the centering device.

Abstract: The invention relates to a method and a device for foaming glue for the production of wood-based sheets. Gluing substance and gas are fed (1,2) into the foaming device through nozzles (3,4), which are directed to mix the gluing substance and gas to be fed to form an essentially homogenous mixture prior to foaming. After this the gluing substance is foamed mechanically in the foaming chamber (5) with the aid of gas.

Abstract: A nozzle unit for the spreading of foamed glue onto a flat surface in the production of wood-based sheets, wherein the nozzle unit has a feeder canal (1) for directing glue into the nozzle unit, a row of nozzles (5) for directing glue from the nozzle unit onto a flat surface and also a distribution canal network between the feeder canal and the nozzles for distributing glue evenly to the nozzles. According to the invention, the area of the distribution canal network has a compensation canal (9) closed to/from external, that forms a free flow channel between the branches of the distribution canal network leading to the nozzles (5).

Abstract: Apparatus for applying glue to veneer sheets comprises elements (6, 7, 8) for transporting veneer sheets (3), supported substantially in a horizontal position, to the gluing, a glue applying device (2) for administering glue onto the veneer traveling under it, as well as elements (9, 10, 11) for directing the glued veneers (4), supported substantially in a horizontal position, to a further processing, said conveying elements being located with respect to each other so as to leave in the direction of transport a transfer gap aligned with the glue administering device (2). The device further includes means for forcing the veneer to be glued and the glued veneer at its center portion in the direction of transport to a different level than the edge portions thereof in the direction of transport.

Abstract: The invention concerns an apparatus for heating a board product (1) containing glued wood. The apparatus comprises a heating chamber, through which the board product (1) passes. The board passes through a heating field in the chamber provided by means of microwave energy applied perpendicular to the board plane. The clearance between the both edges of the board (1) in the proceeding direction of the board, and the wall of the heating apparatus (3), respectively, is filled by a slide piece (2, 2?) being made of material having a small loss tangent and a low dielectric factor. Said slide pieces correct the heating field form affecting in the plane of the board.

Abstract: The invention relates to a method for centering a log for veneer peeling in a lathe. In the method the log is first centered in the centering arrangement of the lathe equipment using centering alignment data based on the contour of the log. On the basis of the thus determined centering data, a computer simulation of peeling is carried out and the results thereof are displayed. The operator performs an alternative centering based on visual evaluation of the log end and, using this centering data, another computer simulation of log peeling is carried out. The peeling outcomes are displayed as an image. The peeling outcomes of all simulations are compared with each other and the centering of actual peeling operation is performed using the centering data giving the optimum yield of peeling.

Abstract: The invention concerns a method to produce a uniformly moist veneer (6) or plywood. According to the invention moisture of the veneer (6) or plywood is measured in one or several points, and any moisture differences noticed in this veneer or plywood are levelled in a moistening stage following said measuring, in which stage the veneer or plywood, based upon measuring results received, is moistened with water or steam in one or several points in order to achieve an adjusted uniform moisture content.

Abstract: The invention relates to a method and a device for foaming glue for the production of wood-based sheets. Gluing substance and gas are fed (1,2) into the foaming device through nozzles (3,4), which are directed to mix the gluing substance and gas to be fed to form an essentially homogenous mixture prior to foaming. After this the gluing substance is foamed mechanically in the foaming chamber (5) with the aid of gas.

Abstract: A nozzle unit for the spreading of foamed glue onto a flat surface in the production of wood-based sheets, wherein the nozzle unit has a feeder canal (1) for directing glue into the nozzle unit, a row of nozzles (5) for directing glue from the nozzle unit onto a flat surface and also a distribution canal network between the feeder canal and the nozzles for distributing glue evenly to the nozzles. According to the invention, the area of the distribution canal network has a compensation canal (9) closed to/from external, that forms a free flow channel between the branches of the distribution canal network leading to the nozzles (5).

Abstract: The invention relates to a continuously operating press for pressing planar products. The press comprises facing platens (7, 7′) between which the product (1) to be pressed is passed in order to subject the same to compression. The press further includes slat elements (2, 2′) introduced as a continuous line of adjacent slat elements between the product (1) being pressed and both ones of the press platens (7, 7′) so as to make the slats to travel with the product being pressed and to slide along the press platens, the surface of the slats facing the platens being provided with a tray recess.

Abstract: The invention relates to a knife assembly for a veneer lathe, the knife assembly comprising heads having mounted therebetween a knife beam and a nose bar beam, the beams respectively supporting a peeling knife and a solid nose bar. The knife assembly is turnable about an axis of rotation aligned parallel to the longitudinal axis of the peeling knife and the nose bar, whereby the angular position of the knife assembly relative to the lathe carriage heads is adapted to change about this axis of rotation in compliance with the progress of veneer peeling. In the knife assembly, the angular position of the nose bar relative to the peeling knife is adapted changeable during peeling in order to control the angle between the nose bar and the peeling knife.