Double seal system for pressurized writing device

Details Double seal system for pressurized writing device Double seal system for pressurized writing device

1997-11-05

1999-07-20

Walczak, David J.

Coating implements with material supply

Including ball, roller or endless-belt tool

Ball

401190, B43K 700

Patent

active

059248106

ABSTRACT:
A writing device generally including a uniformly cylindrical main body partially filled with a writing medium such as ink. A writing tip is inserted into a first end of the main body and a first sealing member is inserted into the second end thereof. The first sealing member is located in the main body near the second end. A pressurized gas such as nitrogen is disposed in the body between the ink and the first sealing member. Alternatively, a gas forming system may be provided in the main body to continually produce a gas as the ink is depleted to maintain pressure therein. A second sealing member is inserted into the second end of the main body to provide a dual seal gas pressurized system.

REFERENCES:
patent: 2519341 (1950-08-01), Barstow
patent: 3130711 (1964-04-01), Eckerle
patent: 3420610 (1969-01-01), Malm
patent: 3659951 (1972-05-01), Germann
patent: 3775015 (1973-11-01), Tsunoda et al.
patent: 4587999 (1986-05-01), Boiko et al.
patent: 5242234 (1993-09-01), Ahrens
patent: 5628576 (1997-05-01), Smith
patent: 5738459 (1998-04-01), Smith

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