Patent ID: 6019463
Filing Date: 2000-02-01
Classification: B41J

Abstract:
An ink cartridge adapted to be removably connected to a printing head of a printer, said ink cartridge comprising:a generally rectangular parallelepiped shaped container having a top wall with a vent hole, a bottom wall with an ink supply hole, and four side walls between the top wall and the bottom wall, said walls forming a chamber therebetween;said bottom wall of said container having an inner surface with a recess in the inner surface, said recess having a bottom wall with an upper end of said ink supply hole opening into said recess bottom wall and being in communication with said recess;said side walls having inner surfaces with ribs arranged on at least a part of the inner surfaces of at least some of the side walls, said ribs extending into said chamber;connecting means for removably connecting the ink supply hole of the container to a printing head;a first ink holding member made of a fibrous material and arranged in the chamber of the container in abutment with at least the container's bottom wall, the top wall and the ribs under pressure;a second ink holding member made of a fibrous material and arranged in said recess in the bottom wall of the container with a top surface thereof being in contact with the first ink holding member and generally flush with the inner surface of the bottom wall of the container, the second ink holding member having a higher fiber density than that of the first ink holding member; anda filter located in the recess between the second ink holding member and the upper end of the ink supply hole.