Pencil sharpener

Details Pencil sharpener Pencil sharpener

1976-10-14

1977-10-18

Simpson, Othell M.

Woodworking

Special-work machine

Pencil sharpening

144 281, B43L 2300

Patent

active

040541649

ABSTRACT:
A pencil sharpener of a rotary type including a rotary blade having spiral cutting edges and a blade holder, wherein the rotary blades makes a rotation around its own axis while making a revolution around a rotational axis of the assembly of the rotary blade and the blade holder by a cooperation of a pinion carried by the rotary blade and a fixed annular internal gear, wherein a cover means is provided to isolate the meshing region of the pinion and the annular internal gear from the shaving region effected by the spiral cutting edges.

REFERENCES:
patent: 3991798 (1976-11-01), Grosjean

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