| 摘要 |
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 ).
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