Writing instrument with movable closure and second sealing means

Details Writing instrument with movable closure and second sealing means Writing instrument with movable closure and second sealing means

1983-09-06

1986-03-11

Bratlie, Steven A.

Coating implements with material supply

Projectable and retractable tool

With movable closure or gate

401108, B43K 900, B43K 712, B43K 802

Patent

active

045752710

ABSTRACT:
A writing instrument comprises, an outer barrel unit (1); a slidable tube (27) housed in the outer barrel unit (1) and movable between a sealing position and an advanced position; an inner tube (16) housed in the slidable tube (27), the inner tube (16) having an opening (18) defined in a distal end thereof and being associated with the barrel unit (1); a writing unit (10) disposed in the inner tube (16) and having a writing tip (14) on a distal end thereof, the writing unit being axially movable among a retracted position, a writing position and a projected position; a first spring for biasing said writing unit rearwardly; a second spring for biasing the slidable unit rearwardly; a first sealing member for sealing said opening (18) of the inner tube (16), the first sealing member being pressable by an inner surface of a front end of the slidable tube (27) against the opening (18) of the inner tube (16) when the slidable tube (27) is in the sealing position; a second sealing member for sealing the writing tip (14) of the writing unit (10) together with the first sealing member, the second sealing member being located between the writing unit (10) and the inner tube (16); and a retaining means for retaining the writing unit (10) at the retracted position and the writing position.

REFERENCES:
patent: 497873 (1893-05-01), Hagenmeyer
patent: 1063134 (1913-05-01), Norris
patent: 3292593 (1966-12-01), Furuya
patent: 3362778 (1968-01-01), Pauese
patent: 3525573 (1970-08-01), Fend

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