Clicking-type ball point pen

Details Clicking-type ball point pen Clicking-type ball point pen

1998-01-07

1999-06-29

Walczak, David J.

Coating implements with material supply

Projectable and retractable tool

Clasp associated with project-retract means or with latch

401105, 401104, B43K 516

Patent

active

059158662

ABSTRACT:
A clicking-type ball point pen has a so-called double-clicking mechanism in which a clicking rod is projected by depression and is retracted by further depression. At least one undercut is formed in the inner surface of a rear barrel cylinder or a component fixed to the rear barrel cylinder to prevent a rotor and the clicking rod from being removed forward from the barrel cylinder. The barrel cylinder incorporates a writing element having a large diameter. A point assembly holder at the distal end of the barrel cylinder has a straight portion, which constantly urges a writing ball forward with a load of 1 g to 80 g, and an elastic portion having spring properties integrally, or in a contact state if the straight portion and the elastic portion are separate components. An ink present from the interior of the point assembly to a follower is defoamed such that a gas, e.g., air, water vapor, or a gas formed of a vaporized organic solvent, which is larger than 0.524 mm.sup.3 (a volume of a sphere having a diameter of 1.0 mm) is absent therein.

REFERENCES:
patent: 3796501 (1974-03-01), Zepell
patent: 3955893 (1976-05-01), Pulaski
patent: 5152626 (1992-10-01), Eppler
patent: 5454655 (1995-10-01), Chiswell

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