Self-venting ink cartridge

Details Self-venting ink cartridge Self-venting ink cartridge

B - Operations, Transporting

41

J

B41J 2/175 (2006.01)

Patent

CA 2464129

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).

L'invention concerne une cartouche d'encre autoventilée (10) qui fournit un fluide extrudable tel que l'encre. Cette cartouche (10) comprend un corps cylindrique (12) qui renferme le fluide et un piston (18) qui pousse le fluide à travers une buse. Le corps cylindrique (12), qui est formé d'une matière enroulée, est garni d'un revêtement qui se replie sur lui-même pour former une zone surélevée (34) légèrement plus épaisse que la zone alentour. Le piston (18) comprend une surface légèrement convexe (36) et une paroi latérale (40) qui forme un ajustement serré avec le corps cylindrique (40). La paroi latérale du piston (40) délimite avec la zone surélevée (34) un canal (A) à travers lequel l'air est automatiquement ventilé lorsque le piston (18) est introduit dans la cartouche chargée de fluide (10).

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