Sharpener for rectangular pencils

Details Sharpener for rectangular pencils Sharpener for rectangular pencils

1988-07-29

1990-10-09

Bray, W. Donald

Woodworking

Special-work machine

Pencil sharpening

144 281, 30451, B23B 500

Patent

active

049614517

ABSTRACT:
Power operated sharpener for nonconic rectangular pencils has single, orbital, weight-balanced cylindrical milling cutter which follows orbital path set by the track of an eliptical internal gear. The cylindrical milling cutter is carried loosely upstanding within an elliptic conic space rising from the track, so as to accommodate the rectangular shape of the workpiece. In operation the sharpener puts a taper on each of the four sides of the end of a rectangular pencil.

REFERENCES:
patent: 2189476 (1940-02-01), Siggelko
patent: 2979031 (1961-04-01), Philbotte
patent: 4054164 (1977-10-01), Kose et al.

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