Mechanical pencil

Details Mechanical pencil Mechanical pencil

1977-04-12

1979-01-30

Crowder, Clifford D.

Coating implements with material supply

Plural tools including projectable and retractable tool

Including individual actuators

401 75, B43K 2108, B43K 2714

Patent

active

041369807

ABSTRACT:
This invention relates to an improved mechanical pencil. More particularly, the invention concerns a mechanical pencil in which the back and forth movements of a writing implement are controlled by a carrier having a spiral guide travelling along the spiral grooves formed on the inside of the pencil barrel, the carrier being adapted to travel along the spiral grooves formed on the inside of the pencil barrel in response to the manual rotations of the cap holding one end of the supporting member.

REFERENCES:
patent: 579596 (1897-03-01), Mathiesen
patent: 1657408 (1928-01-01), Platon
patent: 2406171 (1946-08-01), Smith
patent: 3250254 (1966-05-01), Gerspacker

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