Mechanical pencil

Details Mechanical pencil Mechanical pencil

1976-11-29

1978-08-15

Pellegrino, Stephen C.

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including means to advance material

B43K 2122, B43K 2120

Patent

active

041068742

ABSTRACT:
A mechanical pencil having a mouth piece 5 extendable and retractable in and out of the end portion 3 of a main body 1, and a tip sleeve 14 extendable and retractable in and out of the end portion of the mouth piece 5. The mouth piece is extendable or retractable by fully depressing a push cap 2, while the lead may be inched forward by partially depressing the push cap. The tip sleeve protects the lead, and is designed to automatically move inwardly in response to writing pressure, to thereby always expose the end of the lead for writing.

REFERENCES:
patent: 3437413 (1969-04-01), Parker
patent: 3450482 (1969-06-01), Dorstewitz
patent: 3537799 (1970-11-01), Sakamoto
patent: 3724960 (1973-04-01), Hashimoto et al.
patent: 3765781 (1973-10-01), Hashimoto et al.

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