Mechanical pencil

Details Mechanical pencil Mechanical pencil

1986-05-07

1988-03-08

Reese, Randolph A.

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including means to advance material

401 67, 401 94, B43K 2122

Patent

active

047296844

ABSTRACT:
Mechanical pencil in which a chuck assembly for gripping a lead is formed with plural chuck elements mutually combined with each other. The chuck assembly has an internal longitudinal hole to insert a lead through and a lead gripping portion to grip the lead, while a lead guide tube is movably inserted within the lead inserting hole. The lead guide tube pushes on acting portions of the chuck to open the gripping portions of the chuck elements in the direction of parting them from each other when the lead guide tube is advanced, and the lead gripping portion opens to release the lead. The chuck is designed to enable releasing and gripping the lead securely so that it can be suitably used as a chuck mechanism for extending the lead automatically.

REFERENCES:
patent: 2158991 (1939-05-01), Stenersen
patent: 2532748 (1950-12-01), Votruba
patent: 4180339 (1979-12-01), Katz
patent: 4452544 (1984-06-01), Sumita
patent: 4459057 (1984-07-01), Hashimoto et al.
patent: 4538934 (1985-09-01), Brunner

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