Writing instrument having advance-retract mechanism

Details Writing instrument having advance-retract mechanism Writing instrument having advance-retract mechanism

1993-08-17

1994-08-30

DeMille, Danton D.

Coating implements with material supply

Projectable and retractable tool

By screw mechanism

401110, 401 33, B43K 2406

Patent

active

053421353

ABSTRACT:
A writing instrument includes an advance-retract mechanism for projecting the writing tip from within the barrel for employment of the writing instrument, and retracting the tip to a point within the barrel, when the writing instrument is not in use. A plunger assembly includes a rotatable knob which is disposed at the top of the barrel and is interconnected to a finger which contacts the cam surface of a slidable actuator. Rotation of the knob in one direction advances the writing tip from within the barrel and opposite rotation of the knob is effective to retract the writing tip into the barrel.

REFERENCES:
patent: 3679318 (1972-07-01), Liguori
patent: 3792931 (1974-02-01), Ganz
patent: 4022535 (1977-05-01), Ritter
patent: 4290707 (1981-09-01), Ariga
patent: 4580918 (1986-04-01), Baker et al.
patent: 4786197 (1988-11-01), Koeln et al.
patent: 5092701 (1992-03-01), Lai

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