Pencil sharpener

Details Pencil sharpener Pencil sharpener

1982-10-25

1985-03-26

Schmidt, Frederick R.

Bridges

145 331, 145 36, 145 38, B43L 2300

Patent

active

045067163

ABSTRACT:
A pencil sharpener comprises a tapered pencil-insertion cutting blade. The said blade and/or pencil-insertion bore is disposed so that a taper angle of said blade on the rear side of said sharpener with respect to an axis of a pencil may be smaller than a taper angle of said bore, and so that an end portion of said blade on the rear side of said sharpener may be sited at a distance from a cut surface of the pencil in a direction of the rear side of said sharpener.

REFERENCES:
patent: 521744 (1894-06-01), Veazie
patent: 1779910 (1930-10-01), Kisson
patent: 1887422 (1932-11-01), Oulton
patent: 2130370 (1938-09-01), Spooner
patent: 2702022 (1955-02-01), Fors
patent: 4158912 (1979-06-01), Erdmann

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