Self-venting ink cartridge

Details Self-venting ink cartridge Self-venting ink cartridge

2006-02-07

2006-02-07

Derakshani, Philippe (Department: 3754)

Dispensing

With discharge assistant

Container with follower

C222S387000

Reexamination Certificate

active

06994232

ABSTRACT:
A self-venting cartridge (10) for dispensing an extrudable fluid such as ink. The cartridge (10) comprises a cylindrical body (12) for holding the fluid and a plunger (18) for forcing the fluid through a nozzle. The cylindrical body (12) is formed of a wound material and lined internally with a liner material that overlaps itself to form a raised area (34) that is slightly thicker than the surrounding area. The plunger (18) comprises a slightly convex surface (36) and a sidewall (40) that forms a snug fit with the cylindrical body (40). The plunger sidewall (40) and raised area (34) define a channel (A) through which air is automatically vented when the plunger (18) is inserted into the fluid-filled cartridge (10).

REFERENCES:
patent: 4854485 (1989-08-01), Collins
patent: 5878922 (1999-03-01), Boring

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