Mechanical pencil

Details Mechanical pencil Mechanical pencil

1982-08-16

1985-06-04

Bratlie, Steven A.

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including means to advance material

401 67, 401 81, 401 94, B43K 2116, B43K 2122

Patent

active

045211264

ABSTRACT:
A mechanical pencil includes a lead engaging collet biased rearwardly, a collet receiver tube having a tapered guide face and rolling elements mounted between the tapered guide face and the collet for inducing a clamping force against a writing lead. The pencil includes a device for advancing the collet receiver tube and the collet toward a pencil tip and then permitting the collet receiver tube alone to move rearwardly. This assures that the inner elements will step the lead an increment from the pencil tip for writing purposes.

REFERENCES:
patent: 1969085 (1934-08-01), Leistenschneider et al.
patent: 2385442 (1945-09-01), Hoffman
patent: 4180339 (1979-12-01), Katz

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