Patent ID: 6334391
Filing Date: 2002-01-01
Classification: B41F

Abstract:
In an ink cartridge comprising a hollow cylindrical body for holding a supply of extrudable ink, the cylindrical body having a dispensing end and a plunger end, the plunger end being closed by a plunger adapted to serve as a piston within the cylindrical body to extrude the contents of the dispenser when the plunger is forced toward the dispensing end, the dispensing end being closed by a dispensing fitment affixed thereto, the improvement comprising:an attachment post mounted over a central aperture in the dispensing fitment, said attachment post having a sidewall and a top wall, said top wall having a plurality of openings therein; a nozzle mounted over the attachment post, said nozzle defining a substantially cylindrical space; a plate mounted within the substantially cylindrical space, said plate having a central opening; and a spring mounted within the substantially cylindrical space on the side of the plate away from the attachment post top wall, said spring biasing the plate in sealing engagement with the attachment post top wall; wherein pressure exerted on the plate by the ink causes ink to be extruded through the nozzle.