Aqueous ink cartridge with two part vent plug

Details Aqueous ink cartridge with two part vent plug Aqueous ink cartridge with two part vent plug

1984-03-21

1986-01-21

Bratlie, Steven A.

Coating implements with material supply

Including ball, roller or endless-belt tool

Ball

401135, B43K 702

Patent

active

045654638

ABSTRACT:
A projectable or push-out type writing instrument cartridge, such as a projectable cartridge for a ball point pen, has a filler impregnated with an aqueous ink, a writing point at its one end, a device for feeding the ink to the writing point, and an end plug mounted in the other end of the cartridge. The plug has an air passage which satisfies a predetermined condition. Preferably, the end plug consists of an inner rod and an outer tube which receives the inner rod in such a manner that the air passage is formed between the rod and the tube. The cartridge is secured in the casing of the instrument, and is projectable to a writing position.

REFERENCES:
patent: 2505211 (1950-04-01), Schiesel
patent: 2778337 (1957-01-01), Lovejoy
patent: 2871824 (1959-02-01), Sams
patent: 3216398 (1965-11-01), Washcalus
patent: 3282254 (1966-11-01), Malm et al.

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