Variable curve linebar
AssigneeWeyerhaeuser Company
InventorsEarl D. Hasenwinkle, Frank Wislocker, Charles Blickenderfer
Life of this patent
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Abstract
The present invention is a linebar assembly for guiding a cant or log into a saw. It comprises a flexible linebar which can be bent from a straight-line configuration to one approximating a circular arc having a minimum radius of about 30 m. The linebar can be configured into a circular arc which approximates the curvature of a cant or a log having sweep as great as about 100 mm in 5 m of length. The cant is fed into the saw along a circular path to achieve significantly higher lumber recovery. Extended tests have shown that this recovery will be 20-30% greater than that obtained using conventional straight-line sawing methods without any reduction in grade recovery.
Claims18
A linebar assembly for guiding a cant or log into a saw which comprises
- an elongated flexible linebar means positionable to that one end is adjacent to the saw, said linebar having a longitudinal axis comformable between a straight line and a line approximating an arc of a circle, the end of the linebar adjacent said saw being positionable so that a tangent to the end is essentially parallel to the plane containing said saw;
- and
- bending means for controlling the curvature of said linebar means;
- whereby said linebar can be configured into an arc which approximates the curvature of a cant and said cant can be guided into the saw along a path approximating its radius of curvature.
Dependencies are inferred from the claim text.