Twist retractable writing implement

Details Twist retractable writing implement Twist retractable writing implement

1977-04-01

1979-07-17

Coughenour, Clyde I.

Coating implements with material supply

Projectable and retractable tool

By screw mechanism

401 60, 401 98, B43K 516, B43K 712

Patent

active

041613740

ABSTRACT:
A twist retractable writing implement wherein a cap threadably engages a barrel and supports a scribe element, rotation of said cap longitudinally displaces said scribe element with reference to the barrel alternatively into extended and retracted condition. An internally grooved annular flange with a tapered base forms a socket for mounting the scribe element to the cap and provides an air passageway to the seated end thereof. A non-circular bore adjacent the opening tip of the barrel receives the writing tip of the scribe element while providing an air passageway into the barrel.

REFERENCES:
patent: 246961 (1881-09-01), Livermore
patent: 1711006 (1929-04-01), Alford
patent: 1872064 (1932-08-01), Cuthbert
patent: 3000352 (1961-09-01), Grube et al.
patent: 3037483 (1962-06-01), Caviglione
patent: 3292592 (1966-12-01), Chapman et al.

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