Self-feeding mechanical pencil

Details Self-feeding mechanical pencil Self-feeding mechanical pencil

1980-10-17

1983-10-25

Coven, Edward M.

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including means to limit tool projection

401 65, B43K 2116

Patent

active

044115431

ABSTRACT:
A mechanical pencil is of the type in which a writing lead can be advanced by the extent to which the lead has been worn without changing the writing posture of the pencil. The pencil has a lead holder slidably mounted lengthwise within a casing, a lead guide tube slidably mounted within the casing together with the lead holder, a lead feeding device mounted movably within the casing for feeding the lead into the lead guide tube, and a device mounted movably within the casing for locking rearward movement of the lead feeding device. The lead can be advanced by merely releasing a writing pressure which was applied by the writing tip onto a piece of writing paper.

REFERENCES:
patent: 2523568 (1950-09-01), Halverson
patent: 3424535 (1969-01-01), Schischkow
patent: 3514211 (1970-05-01), Hashimoto et al.
patent: 3804536 (1974-04-01), Torii et al.
patent: 3850531 (1974-11-01), Ackermann
patent: 3864046 (1975-02-01), Butka
patent: 3899256 (1975-08-01), Mitsuya
patent: 4180339 (1979-12-01), Katz

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