Patent ID: 6196671
Filing Date: 2001-03-06
Classification: B41J

Abstract:
An ink jet cartridge for an ink jet printer having a printhead for use with at least one replaceable ink supply tank in fluid communication with the printhead, comprising:a housing having said printhead fixedly attached thereto, a floor containing an ink passageway, and at least one ink pipe connector protruding from said floor, the passageway having an outlet sealingly connected to the printhead and an inlet integrally connected to said at least one ink pipe connector,said at least one pipe connector having an ink entrance in the portion thereof protruding from said floor, a mesh filter internally recessed from the ink entrance, and a cover closing the entrance and forming an internal chamber between said filter and the cover, andsaid cover having a plurality of holes therethrough, the holes having a cross-sectional area sufficiently small to cause the formation of an ink meniscus when said chamber is filled with ink, thereby preventing the ink in the chamber from leaking out and air from entering the chamber through said holes.