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US Patent: 577,582
Harrison J. Mitchell - Beloit, WI
Franklin L. Lane - Beloit, WI

USPTO Classifications:
15/230, 451/500, 451/513

Tool Categories:
woodworking machines : sanding machines

Berlin Machine Works - Beloit, WI

Berlin Machine Works - Beloit, WI

R. D. Jacobs
J. M. Keith

Patent Dates:
Applied: May 22, 1896
Granted: Feb. 23, 1897

Patent Pictures:
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"Vintage Machinery" entry for Berlin Machine Works
This very important patent covers the use of a sanding drum designed so that the paper is wrapped spirally along its length. A spiral groove accommodates a small amount of overlap of the paper. The result is a cylinder that sands smoothly, without the bump-bump-bump of the designs it replaces. This innovation achieved great success for Berlin Machine Works, which became known as P. B. Yates Machine Co.

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