| 摘要 |
In an endless belt sanding tool, drive is imparted to the endless belt by a drive roller contacting the outer sanded face of the belt at a part thereof intermediate two thrust rollers. The tool may have an integral motor, or be adapted for drive from an external source such as an electric drill. A preferred embodiment has the belt and its support and thrust means on a portion of a tool body which is separable from the remainder of the tool body carrying the driving roller. Step adjustment or spring-loading may be provided to tension the belt. A speed-change is advantageously included in coupling means to the drive roller. The body may include an extension pivotable with respect to the remainder, for positioning the belt in a non-linear path. The body may include a resilient backing plate for the belt. A plurality of discrete belts may be arranged in a bunch, with provision for maintaining tension in the remainder whenever a worn belt is removed.
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