Patent ID: 7618137

Claim:
An ink jet recording system comprising an ink jet recording apparatus having an ink jet type recording head and an ink cartridge removably attached to said ink jet recording apparatus, wherein: said ink jet recording, apparatus comprises: an ink supply path that leads to said recording head, an ink holding section for absorbing and holding the ink by its capillary force, said ink holding section being located at an outer end of said ink supply path and having a contact surface exposed to outside, and a pressing section connected to said ink supply path at a position between said ink holding section and said recording head; and said ink cartridge comprises: a case containing ink to be supplied to said recording head, an ink outlet to be connected to said ink supply path, a filtering porous member for filtering the ink as flowing through said ink outlet, said filtering porous member being located at said ink outlet with one surface exposed to outside said case, and a pushing member for pushing said pressing section, wherein, as said ink cartridge is attached to said ink jet recording apparatus, said exposed surface of said filtering porous member comes into tight contact with said contact surface of said ink holding section, and said pushing member pushes said pressing section to apply pressure to the ink inside said ink supply path, thereby to send the ink into said ink holding section and connect the ink inside said ink supply path to the ink in said case through an interface between said exposed surface of said filtering porous member and said contact surface of said ink holding section.