Retractable pen with self sealing writing tip opening

Details Retractable pen with self sealing writing tip opening Retractable pen with self sealing writing tip opening

1990-03-30

1991-06-11

Johnson, Richard J.

Coating implements with material supply

Projectable and retractable tool

With movable closure or gate

401 59, B43K 3400, B43K 302, B43K 516

Patent

active

050227734

ABSTRACT:
A writing instrument having a retractable writing tip and hollow pliable seal with a closure pinched by a metal spring clip to seal the instrument's writing tip from contact with open air. The instrument may use writing tips, such as roller ball, fountain and felt tips, which employ volatile inks.

REFERENCES:
patent: 2291859 (1942-08-01), Andrews
patent: 3583820 (1971-06-01), Koein
patent: 3637316 (1972-01-01), Bross
patent: 4540300 (1985-09-01), Midorikawa
patent: 4618280 (1986-10-01), Kageyama

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