Capless retractable marking pen

Details Capless retractable marking pen Capless retractable marking pen

1990-03-15

1990-11-13

Johnson, Richard J.

Coating implements with material supply

Projectable and retractable tool

With movable closure or gate

401107, B43K 900

Patent

active

049697641

ABSTRACT:
An improvement is provided for a retractable tip marking pen whereby the tip, in its retracted position, is enclosed in a chamber which prevents drying of the marking fluid. The chamber is provided by an elastomeric sealing member positioned within the outer sheath of the pen adjacent the lower extremity thereof. The sealing member automatically opens when the tip is pushed to its writing position, and closes when the tip is retracted to its stored position.

REFERENCES:
patent: 2626592 (1953-01-01), Hedler
patent: 2874679 (1959-02-01), Zepelovitch
patent: 3525573 (1970-08-01), Fend
patent: 4540300 (1985-09-01), Midorikawa
patent: 4618280 (1986-10-01), Kageyama
patent: 4711592 (1987-12-01), Gregory

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