Ink cartridge with self-closing valve

Details Ink cartridge with self-closing valve Ink cartridge with self-closing valve

B - Operations, Transporting

41

F

B41F 31/08 (2006.01)

Patent

CA 2452837

An improved ink cartridge (10) of the type used to dispense inkin automatic lithographic presses. The ink cartridge (10) comprises a hollow cylindrical body (12) for holding a supply of extrudable ink, a plunger (14) and a dispensing fitment (16). The improvement comprises a valve member (50) mounted over a central aperture (38) in the dispensing fitment (16), and a flexible molded plastic spring (44) that biases the valve member (50) in the closed position. The valve member (50) opens when subjected to pressure from the ink and closes automatically and completely when the ink pressure is less than the biasing force of the flexible spring (44).

L'invention porte sur une cartouche d'encre améliorée (10) que l'on utilise pour distribuer de l'encre dans les presses lithographiques automatiques. La cartouche d'encre (10) comporte un corps cylindrique creux (12) permettant de contenir une alimentation en encre extrudable, un piston (14) et une douille de distribution (16). L'amélioration tient au fait que l'élément de valve (50) est monté au dessus d'une ouverture centrale (38) ménagée dans la douille de distribution (16) et qu'un ressort plastique moulé flexible (44) sollicite l'élément valve (50) en position fermée. L'élément valve (50) s'ouvre, lorsqu'il est soumis à la pression provenant de l'encre, et se ferme automatiquement et complètement lorsque la pression de l'encre est inférieure à la force de sollicitation du ressort flexible (44).

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