Abstract: The invention relates to a chipper knife for chippers of the type comprising a tool (12) which is rotatable on an axis of rotation and is in the form of, for example a drum, disc or truncated conical body, which supports a plurality of such chipper knives. The chipper knife comprises at least one cutting edge (1) which is formed between a flank (2, 2?) and a chip guiding surface (4, 4?), and two opposite main surfaces (3, 3?) which are adapted to abut against and be retained on the opposite seats (14, 15) of a holder (9, 10) on the tool. At least one main surface (3, 3?) of the chipper knife which is located on a wood side of the chipper knife comprises a cross-sectionally convexly bent surface portion (6, 5?) which connects to and extends backwards from the flank (2, 2?) and the chord of which constitutes at least 20%, preferably at least 30% and, most preferably, at least 40% of the total cross-sectional length of the chipper knife. The invention also relates to a holder for such a chipper knife.

Abstract: A knife for a disk chip cutting machine which is mounted between a carrier part and a clamping part and which includes a chip breaking surface extending into an opening adjacent an outer surface of the carrier part. The chip breaking surface includes a concave portion which terminates in a rib which extends outwardly and downwardly with respect to an interface between the knife and the carrier part with the concave portion being oriented to direct cut chips in a direction away from the outer surface of the carrier part during use.

Abstract: A wood processing device having a spinning wood processing head having one or more spaced apart knives mounted on said spinning head for processing wood. The knives, upon contacting said wood, form a curved cut surface in said wood being processed. At least one limit surface is adjustably mounted between said one or more knives on said spinning head, said limit surface being sized and shaped to limit abnormal movement of said wood during processing. An adjustor for adjusting a position of said limit surface is provided to permit said limit surface to limit abnormal movement of said wood over a range of operating conditions. In a preferred embodiment the limiter is curved. A method of adjusting a wood processing head is also disclosed.

Abstract: The invention relates to a chipper knife with at least one cutting edge (6) along at least one of its side edges. The chipper knife is adapted to be mounted in chippers of the kind which are used to cut chips of a desired size and shape from pieces of wood or timber (7) and which comprise a tool, in the form of a plane or conical disc, which is arranged for rotation about an axis of rotation and on which a plurality of such chipper knifes (2) are mountable in such manner that one end of the cutting edge of the chipper knife is located closer to the axis of rotation of the tool than the opposite end of the cutting edge. The cutting edge (6) of the chipper knife is formed between a timber-guiding surface and a chip-guiding surface, the timber-guiding surface having a varying angle along its length in relation to a plane of rotation in such a way that the angle is greater at the end of the cutting edge located closest to the axis of rotation decreases in the outward direction.

Abstract: A knife for a disk chip cutting machine which is mounted between a carrier part and a clamping part and which includes a chip breaking surface extending into an opening adjacent an outer surface of the carrier part. The chip breaking surface includes a concave portion which terminates in a rib which extends outwardly and downwardly with respect to an interface between the knife and the carrier part with the concave portion being oriented to direct cut chips in a direction away from the outer surface of the carrier part during use.

Abstract: A wood working knife for use in a wood working machine, comprising a knife body having a first cutting edge and an opposed second cutting edge, the knife body having a first clamping surface and a second clamping surface. The first clamping surface has opposed clamping features separated by a middle section, the opposed clamping features and the middle section being sized and shaped such that, upon the knife body being inserted into a clamping assembly, the clamping forces are localized towards the opposed cutting edges and away from the middle section.

Abstract: A wood processing device having a spinning wood processing head having one or more spaced apart knives mounted on said spinning head for processing wood. The knives, upon contacting said wood, form a curved cut surface in said wood being processed. At least one limit surface is adjustably mounted between said one or more knives on said spinning head, said limit surface being sized and shaped to limit abnormal movement of said wood during processing. An adjustor for adjusting a position of said limit surface is provided to permit said limit surface to limit abnormal movement of said wood over a range of operating conditions. In a preferred embodiment the limiter is curved. A method of adjusting a wood processing head is also disclosed.

Abstract: The present invention relates to a processing means for barking machines of the type having a plurality of swinging arms, each being at an inner end pivotally mounted on a rotatable, annular rotator, while at an opposite outer free end, they carry such a processing means and are actuated by a spring load which strives to pivot the outer end inwards to the axis of rotation of the rotator. The processing means comprises a front, a rear, an upper and a lower surface, which are designed in such manner that an edge serving as a processing edge is defined between the front and the upper surface. The, lower surface is formed with an engaging means which is adapted to engage a matching formation in a seat in the outer end of the swinging arm. The rear surface acts as a supporting surface which serves to abut against a corresponding swinging arm supporting surface which is directed forwards or obliquely forwards against the direction of feed of the logs.

Abstract: A self aligning knife clamping assembly and machine incorporating the same are disclosed. In one embodiment there is provided a knife clamping assembly having an upper clamping component, a lower clamping component and a fastening device, such as a bolt, therebetween, to permit the clamping components to be releasably clamped together onto a knife element having a knife edge. Positioned between the knife element and the clamping assembly is a biasing element, which urges the knife element to enter, or remain in, a preferred position prior to the knife element being immovably clamped into place. In the preferred embodiment the biasing element is in the form of an elastomeric strip.

Abstract: The invention concerns a barking tool for barking machines of the type having a plurality of swinging arms, each being at an inner end pivotally mounted on an annular rotator which is rotatable about an axis of rotation, and each having at a free outer end a processing edge. The processing edge is defined between a front and a top surface, which is adapted, during barking, to make an acute angle with the circumferential surface of the log. The barking tool further has a bead, which is located on the top surface in an area adjacent to the end of the processing edge furthest down in the feeding direction.

Abstract: A cutting blade for working logs to timber form while simultaneously removing wood chips which includes a pair of adjacent recesses formed in the periphery of the blade. A knife is bolted in the cutting blade in a first recess and a wear insert is separately bolted to the cutting blade in the adjacent recess. The bolts are countersunk so as not to extend outwardly from the knife or wear insert.

Abstract: The invention relates to a debarking means for rotation ring type barking machines, and of the type comprising a plurality of swinging arms (1) yieldably engaging the circumference of an unbarked log and each formed at its free end with a seat (4) for a debarking means (2) detachably mounted by means of a bolt connection (3). The debarking means has a leading edge (7) serving as a cutting edge and a trailing support edge or surface (8) adapted to engage a shoulder (5) on the seat (4) to prevent turning of said debarking means relative to the arm. The support edge (8) extends obliquely in relation to the cutting edge (7), more particularly along the entire width of the debarking means and between two side edges of said means which are of different length.