Pencils not requiring sharpening

Details Pencils not requiring sharpening Pencils not requiring sharpening

1975-09-02

1977-04-26

Charles, Lawrence

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including holder

B43K 1914

Patent

active

040198227

ABSTRACT:
Pencils not requiring sharpening are produced by wrapping a thermoplastic resin sheet, which has been uniaxially stretched, around a core material so that a stretched direction of the sheet forms a spiral against the core material, whereby the sheet forms a holder for the pencil which may be stripped off to selectively expose the core material.

REFERENCES:
patent: 2720966 (1955-10-01), Davis
patent: 2770358 (1956-11-01), Keith
patent: 3010862 (1961-11-01), Basche
patent: 3704071 (1972-11-01), Muller et al.

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