Abstract: The invention relates to a system for sorting veneer sheets. The system comprises: an assembly section; a reject section; a feeding section arranged between the assembly section and the reject section; at least one detection device configured to scan a top surface of a topmost veneer sheet of a stack of veneer sheets to provide a plurality of successive scan lines images; at least two parallel transfer devices; and a control system.

Abstract: The invention relates to a wood conditioning system comprising: a first chamber; a second chamber; at least one air conveyor device for circulating air between the first chamber and the second chamber; the second chamber comprising at least one device for spraying water substantially against a direction of the circulated air. Some aspects of the invention relate to a method for wood conditioning.

Abstract: Disclosed is a jet box for guiding an incoming air flow in drying of a veneer sheet. The jet box includes at least one jet nozzle. The jet nozzle includes a guide surface forming a three dimensional opening structure, which is limited at its first end to an inner opening and at its second end to an outer opening. The guide surface includes a first portion and a second portion, wherein the first portion substantially on a side of the incoming air flow is convexly curved outwards from the jet box and the second portion substantially on the opposite side of the opening structure in relation to the incoming air flow is concavely curved outwards from the jet box. Also disclosed is a dryer including at least one jet box.

Abstract: The invention relates to a method for the optimal positioning of veneer sheets at a lay-up station, wherein the veneer sheets are attached for a veneer assembly composed of veneer sheets glued on top of each other. The method comprises determining an optimal position for each veneer sheet and a location for virtual alignment edges and laying up the veneer sheets as positioned in accordance with the virtual alignment edges, for a veneer assembly.

Abstract: A veneer patching apparatus includes a detection device for detecting and locating defect points in the veneer, a stationarily located patching unit (1/2) having a punch and a patch inserter, and elements (5, 7) for holding and conveying the veneer, controlled by the detection device. Each veneer specific patching apparatus has two or more patching units (1,2).

Abstract: A device for stacking veneer sheets (1, 2) while substantially horizontal, the device including a supporting element, that escapes in the advancement direction at a release area from beneath the veneer (2) to be stacked, the supporting element being moved by a conveyor (7), and a controlled element for stopping the veneer to be stacked in a corrected position at a release point. An element for stopping the veneer to be stacked is a gripper (10) that grips the trailing edge of the veneer (2) from below and moves up and down, in the advancement direction of the veneer, and transversely to it, the gripper having a gripping point to the veneer at the trailing edge in the veneer's advancement direction, extended at a distance in the advancement direction from the gripper's transverse travel path.

Abstract: A method for optimizing the operation of a gas generator having a housing part, at the upper end of which are elements for supplying fuel to a fuel compartment inside the housing part. The fuel descends by gravity onto a grate, a combustion zone being formed above the grate, with elements for supplying gasification gas thereto. The grate includes two concentrically arranged first and second grate parts, at least one of which grate part can be turned around an axis of rotation passing through a joint centre. The grate parts can be moved in the direction of the axis of rotation towards each other into their mutually interlocking position, and away from each other, into a position partly or completely out of the interlocking position. The grate parts move with respect to each other to regulate the flow of gases through the grate and/or the removal of ash.

Abstract: A press apparatus for curing adhesive on inner adhesion surfaces of substantially continuous wood products (1) under synchronous compression heating. The apparatus includes at least two presses (2) having a mutual distance from each other fulfilling the precondition: L/(n?1), where L is the working length of each press and n is the number of presses in series.

Abstract: A method and apparatus for improving of wood veneer quality is provided. In the method, veneers are conveyed through a compression gap made up by two press elements, the gauge of said gap being adjustable. The method comprises the use of an endless felt assembly, which is adapted to circle around at least one of the press elements and which passes through the compression gap in such a way that at least one face of the veneer is brought against the felt assembly in said compression gap.

Abstract: A device for stacking veneer sheets (1, 2) while substantially horizontal, the device including a supporting element, that escapes in the advancement direction at a release area from beneath the veneer (2) to be stacked, the supporting element being moved by a conveyor (7), and a controlled element for stopping the veneer to be stacked in a corrected position at a release point. An element for stopping the veneer to be stacked is a gripper (10) that grips the trailing edge of the veneer (2) from below and moves up and down, in the advancement direction of the veneer, and transversely to it, the gripper having a gripping point to the veneer at the trailing edge in the veneer's advancement direction, extended at a distance in the advancement direction from the gripper's transverse travel path.

Abstract: A veneer lathe for peeling veneer from a log includes a first and a second support roll and a counter roll, all the rolls being parallel with the rotation axis of the log and having a length of substantially at least the length of the log. Each roll includes a shaft, with discs placed thereon having a width equaling to not more than the distance of the discs from each other in the longitudinal direction of the log. The discs have an outer diameter greater than that of their respective shaft and are concentric therewith. The discs of the second support roll and counter roll do not coincide in the longitudinal direction with the discs of the first support roll for enabling overlapping of the discs of the second support roll and the counter roll with the discs of the first support roll in the radial direction of the discs.

Abstract: An apparatus for stacking veneer sheets is provided, said apparatus comprising conveyor means for delivering veneer sheets to a stacking point and means for placing veneer sheets on a stack to be formed. The conveyor means comprise a first and a second conveyor element disposed on opposite sides of a veneer sheet, said first and/or second conveyor element being provided with magnet elements arranged for cooperation with a conveyor element present on the opposite side, such that the veneer sheet to be fed in between the conveyor elements is pressed with a desired force between the conveyor elements and is movable thereby to a stacking point, which is provided with stopper means for stopping the veneer sheet and with means for releasing the veneer sheet from between the conveyor elements to enable its placement on a stack to be formed.

Abstract: A press apparatus for curing adhesive on inner adhesion surfaces of substantially continuous wood products (1) under synchronous compression heating. The apparatus includes at least two presses (2) having a mutual distance from each other fulfilling the precondition: L/(n?1), where L is the working length of each press and n is the number of presses in series.

Abstract: In a microwave heating apparatus, the fundamental TE10 mode of the standard waveguide (5) having a standard rectangular cross-section is fed into an elongated heating cavity (2) having an enlarged rectangular cross-section in which the shorter side of the standard waveguide is enlarged to a length which can accommodate the desired width of a board (8) to be heated. A pair of lateral slots (25) is provided parallel in the opposite enlarged walls (11) of the heating cavity (2) to form a track for the board (8) to travel across the cavity. As the initially longer sidewall (11) of the standard waveguide is unchanged, the fundamental mode is not affected but the electric field is uniformly distributed along the width of the board (8) traversing the electric field and the cavity. As a result, wider products can be heated and a more uniform heating pattern can be achieved.

Abstract: A veneer patching apparatus includes a detection device for detecting and locating defect points in the veneer, a stationarily located patching unit (1/2) having a punch and a patch inserter, and elements (5, 7) for holding and conveying the veneer, controlled by the detection device. Each veneer specific patching apparatus has two or more patching units (1,2).

Abstract: The invention concerns an apparatus for transferring sheet-like objects from a stack, said apparatus including separate lifting elements gripping by suction to the upper surface of the sheet-like object to be transferred, positioned in a row extending over the stack of the sheet-like objects, and transfer elements for transferring the lifted sheet-like object. The suction effect of the lifting elements is controlled by means of a control device including a light source making a substantially line-shaped illumination pattern. The illumination of the light source is focused at an inclined angle to the surface of the sheet stack, substantially parallel to the lifting element row. A camera means for observing the illumination pattern forwards information about the uniformity of the uppermost layer of the stack.

Abstract: The invention relates to a microwave waveguide element for matching a standard waveguide input port to an enlarged waveguide output port. In the waveguide element, a plurality of intermediate waveguide segments is cascaded in the propagation direction of the microwave energy to first split the waveguide element into two symmetrical waveguide branches and then combine the branches at the output port. Thus, the width of the waveguide element is gradually enlarged and the input port is matched to the output port. The intermediate waveguide segments are preferably dimensioned such that respective characteristic impedances are approximately matched with each other for the fundamental mode.

Abstract: A veneer patching apparatus for removing defects from a plywood veneer (1) includes a defect removing plunger (5), a punch (6) passed through by the removing plunger (5), a patch plunger (8) passing through the punch in alignment and synchronously operating with the removing plunger, elements for feeding the veneer to be patched between the removing plunger, and the punch and elements for feeding patch veneer (2) between the patch plunger and the punch. The stroke length of the removing plunger extends to the level of the patch veneer, and the feeding of the patch veneer is arranged as a continuous web to be fed during the return stroke. The defect to be removed has been arranged to be removed from the apparatus by pressing the defect spot with the removing plunger into the hole made by the patch plunger in the patch veneer.

Abstract: A method for centering the settling of veneers on top of each other in a veneer pile, the veneers being cut from a log by slicing and dried. A substantially horizontal pile is, freely supported and having in the lateral direction extreme limits with clearance, subjected to a horizontal swinging motion whereby the extreme limits are reduced during the swinging motion.

Abstract: The present invention is directed to a method for manufacturing a panel containing wood fibers. The wood material is cut into strands having a thickness and a width perpendicular to the grain direction and a length parallel with the grain direction, the length being significantly greater with respect to the other dimensions. An adhesive is applied to the strands, the glued strands are formed into an assembly, wherein the strands are substantially parallel in the longitudinal direction, and the strands remaining substantially parallel in the longitudinal direction are extruded by applying a thrusting force substantially perpendicular with respect to the longitudinal direction of the strands.