Kmw Aktiebolag

Sven A Svensson

Bo J Oledal

Stig-Gunnar E Lofgren

A drum for stripping branches, bark and like so-called waste from trees or like woody plants, or for at least pre-treating the trees or like woody plants in a manner to soften or crush the branches and bark thereon, comprises a plurality of mutually co-axial drum sections (1-6). For the purpose of preventing a tree from being lifted in the drum under the action of obliquely positioned stripping bars, the drum sections are rotated alternately in clockwise and anti clockwise directions, which also prevents the tree from being rotated about its longitudinal axis. The stripping bars, which co-act with openings (22, 23, 24) through which removed waste material is released from the drum, are obliquely positioned relative to the axis of rotation (27) of the drum. The stripping bar of each drum section is obliquely positioned relative to the stripping bar of an adjacent drum section.

Drum for stripping or pre-treating trees or like plants

A barking drum has a substantially cylindrical drum shell (1) with an essentially horizontal axis and at least one bearing ring (3) or similar device. The ring (3) surrounds an annular portion of the shell (1) and forms an interjacent gap (5). Further, the ring (3) is fixed relative to the drum shell (1) by means of a plurality of fastening means (7) fitted in the gap (5) and spaced at equal distances around the circumference of the shell. In order to produce an improved fixing of the ring (3) and the shell (1) in relation to each other, at least some of the fastening means (7) consist of an adjustable clamp that is expandable in a radial direction relative to the shell (1) and which is so constructed that any resilience is negligible, so that the ring (3) is substantially rigidly clamped onto the shell (1).

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Sjalevad, Sweden

Sven A Svensson