Abstract: A band saw, a band saw assembly, and a method of spatially positioning a band saw blade are suggested. The band saw comprises a band saw blade against which a sawing material is adapted to be guided in a feed direction. A guide for the band saw blade has at least one magnet exerting a force on the band saw blade determining the spatial position thereof. The at least one magnet is adjustable in its force effect and the force is directed transversely to the feed direction. The guide, as viewed in the feed direction of the sawing material, has a front magnet and a rear magnet, the magnets facing a front area and a rear area, respectively, of the band saw blade. A method of spatially positioning a band saw blade is executed while a sawing material is guided against the band saw blade in a feed direction. A magnet force is exerted on the band saw blade. The magnet force, and thereby the position of the band saw blade is adjusted transversely to the feed direction.

Abstract: A band saw has a band saw blade and a guide for the band saw blade. The guide comprises at least two magnets enclosing the band saw blade within a gap between them and exerts on the band saw blade a force influencing a position thereof in space. A blow out device is provided which is connected to the gap.

Abstract: A band saw, a band saw assembly, and a method of spatially positioning a band saw blade are suggested. The band saw comprises a band saw blade against which a sawing material is adapted to be guided in a feed direction. A guide for the band saw blade has at least one magnet exerting a force on the band saw blade determining the spatial position thereof. The at least one magnet is adjustable in its force effect and the force is directed transversely to the feed direction. The guide, as viewed in the feed direction of the sawing material, has a front magnet and a rear magnet, the magnets facing a front area and a rear area, respectively, of the band saw blade. A method of spatially positioning a band saw blade is executed while a sawing material is guided against the band saw blade in a feed direction. A magnet force is exerted on the band saw blade. The magnet force, and thereby the position of the band saw blade is adjusted transversely to the feed direction.

Abstract: An apparatus for producing an essentially wedge-shaped wood flake comprises a chipping tool rotating about a first, horizontal axis for chipping the flake out of the wood such that the flake has a first, concave surface and a second, convex surface. The flake is delimited between the surfaces. A circular saw blade is provided rotating about a second, vertical axis for removing wood in an area in which the surfaces intersect in an imaginary tip, prior to the chipping out.

Abstract: For use as a wood intermediary and the like in industry, an essentially wedge-shaped wood flake with opposite concave and convex surfaces that converge at an imaginary tip outside the flake dimensions. The tip is located beyond the flake a distance of typically between 40% and 100% of the flake length.

Abstract: An apparatus for producing an essentially wedge-shaped wood flake comprises a chipping tool rotating about a first, horizontal axis for chipping the flake out of the wood such that the flake has a first, concave surface and a second, convex surface. The flake is delimited between the surfaces. A circular saw blade is provided rotating about a second, vertical axis for removing wood in an area in which the surfaces intersect in an imaginary tip, prior to the chipping out.

Abstract: The invention is related to a method and an apparatus for dissecting a log into boards, the log being adapted to be displaced on a longitudinal conveyor in a longitudinal direction. For determining the board length, it is prior art to cut the log at its periphery by means of a cross-cut saw prior to dissecting the log into boards. As the cross-cut saw is stationary, the determination of the cutting depth is effected by displacing the log transversally. In the case of larger cutting depths, the log must be displaced back in the transversal direction after effecting the cross-cut so that a board of desired thickness may then subsequently be dissected from the log by means of a band saw. During that back displacement, it may happen that the log slips on the longitudinal conveyor so that the dimensional accuracy is lost.

Abstract: For use as a wood intermediary and the like in industry, an essentially wedge-shaped wood flake with opposite concave and convex surfaces that converge at an imaginary tip outside the flake dimensions. The tip is located beyond the flake a distance of typically between 40% and 100% of the flake length.

Abstract: A method and an apparatus for fabricating strands from round wood are disclosed. The strands have a length of between 200 and 350 mm in the direction of the wood fibers and have a width of between 1 and 15 mm. The strands are fabricated from profiled logs. In the cross-section of the logs, residual areas outside a center piece are defined, the center piece being the area intended to be dissected into beams or boards at a later stage. The residual areas are provided with longitudinal slits by cutting or sawing. The strands are then cut out of the residual areas until the residual areas are entirely removed.

Abstract: A circular saw blade has a rotary axis and a flat annular body arranged therearound. The annular body has a periphery being provided with teeth. The annular body is of hollow conical shape. For manufacturing the circular saw blade, an initially flat annular body is bolted into a concentric conical support element, thereby deforming the annular body into a hollow conical shape.

Abstract: A method and an apparatus are disclosed for separating or slitting a rigid material, in particular a piece of wood, having a modulus of elasticity of between 50,000 and 400,000 kg/cm.sup.2. A narrow tool having chip-removing elements, in particular a circular saw blade, produces a slot or kerf of finite width in the material at a cutting speed of more than 40 m/s. After the chip-removing elements having passed, a separator element bends a side piece out of the slot plane so that after the chip-removing elements have passed, the side piece is always at a distance from the tool. When viewed along the feed direction of the material, the separator element is provided with a hump at a distance from its periphery adjoining the tool and being first to come into contact with the material when the material is fed in. An imaginary connection line extending between the hump and the chip-removing elements is at a distance above a first portion of the separator element lying between the hump and the periphery.

Abstract: A conveyor system serves for conveying timber products, in particular boards (13) having at least one flat side. The conveyor system (10) comprises a transverse conveyor and a linear conveyor (11) the conveying direction (14) of which include between them an angle of substantially 90.degree. in a horizontal plane. The transverse conveyor is arranged upstream of the linear conveyor (11) in the conveying direction. It is adapted for feeding the timber products in a direction perpendicular to their longitudinal extension and for transferring them to the linear conveyor (11) at a transfer station.

Abstract: An apparatus and a method serve for cutting elongate pieces of wood having a modulus of elasticity between 50,000 and 400,000 kg/cm.sup.2. A circular saw blade is provided having a plurality of spaced peripheral teeth. The saw blade is rotated about an axis at a cutting speed exceeding 40 m/s. The pieces of wood are displaced relative to the saw blade along a feeding direction extending perpendicular to the saw blade axis of rotation. A stationary bending element is arranged on a broad side of the saw blade adjoining the cutting teeth. The bending element has a radially profiled surface with at thickness increasing towards the axis and decreasing towards the cutting teeth. The saw blade can be used to cut a slot into the pieces of wood along the feeding direction, thus generating a first and a second section of the pieces of wood. The bending element ensures that the first section is lifted from the saw blade immediately after the formation of the slot.

Abstract: A method serves for flattening logs (10) showing a curved longitudinal center line (10a). The logs (10) are conveyed in horizontal position in their longitudinal direction, with their convex side (11) up and their concave side (12) down. The concave side (11) of the logs (10) is flattened from below in the area of their butt ends (27). In order to optimize the yield in wood, the logs (10) are measured before carrying out the flattening step, in a position where they are supported on a reference plane (13) by the end points (20, 22) of their concave side (12) only. The geometrical position of a first point (26) of the log (10) is determined on the convex side (11) as its elevation above the reference plane (13).

Abstract: A method and a device serve for cutting or slotting rigid material, in particular wood, having a modulus of elasticity of, preferably, approximately 50,000 to 400,000 kg/cm.sup.2. A gap of finite width is cut into the material by a narrow tool comprising cutting elements, in particular a circular saw blade, at a cutting speed of over 40 m/s. After passage of the cutting element a timber section is always lifted off the remainder of the material and bent out of the plane of the gap. In order to reduce the thermal loading of the tool, which is generated by the friction between the timber section and the tool, the timber section is always bent off in such a manner that once the timber section has left the cutting elements, it is spaced a certain distance from the circular saw blade.

Abstract: A method and apparatus for producing lumber products which are machined on all sides. With this method, the curved trunk which is to be machined, and which increases approximately conically in thickness toward one of its ends, is first, prior to flattening its longitudinal sides and cutting off boards, aligned relative to a processing line of sawmill equipment in such a way that its longitudinal central plane, which is disposed in the direction of curvature of the trunk, extends approximately parallel to the machining surfaces of side cutting devices which flatten the longitudinal sides of the trunk. After that, a portion of the large trunk end which projects beyond an alignment plane is flattened. This flattening is effected in a plane which is tangential to the two trunk ends on a convexly curved surface portion thereof.