| 摘要 |
<p>A compact radius log sawing apparatus (1) cuts a log (2) longitudinally along a radius curve to produce boards. This sawing apparatus (1) includes a C-shaped housing (11) containing a plurality of radially adjustable paired rollers (5, 6) and a continuous flexible saw blade (3) provided with teeth (8) at one or both edges. A support exposes a section of saw blade (3) that is curved and stabilized by the use of electromagnetic fields in cooperation with rollers. The saw (3) is then configured to make a cut of a desired thickness in a curve parallel the growth rings of a log, in an arc which minimizes the number of knot defects in the board. The compact radius cutting saw (3) may be modified to provide a straight cut by replacing the curved blade with a conventional band saw blade (52). This straight cut saw may optionally include a guide/drive wheel assembly (65, 65a) positioned within or external to the housing. An extendable and retractable sleeve (62) at each open end of the C-shaped housing is provided to further stabilize the saw blade and provide a gentle flow during its course of travel.</p> |
