Patent ID: 7416289

Claim:
An ink cartridge comprising: an ink refill bag including a cap having an ink passage through which ink is supplied to an inkjet recording apparatus that ejects ink droplets for printing; and an ink storing section formed by thermally welding a plurality of flexible film members together; and an ink refill bag housing in which the ink refill bag is accommodated; wherein the ink refill bag housing is provided with at least one bag loading opening through which the ink refill bag is loaded and removed, and wherein the ink refill bag housing is a generally rectangular parallelepiped frame including a generally rectangular upper face having an attachment section to be detachably attached to the inkjet recording apparatus; a generally rectangular lower face having a cap fitting opening at a substantial center in which the cap of the ink refill bag is press-fitted; and six columnar connecting sections that connect a center portion and opposing end portions of each of two longitudinal edges of the upper face to a corresponding center portion and corresponding opposing end portions of each of two corresponding longitudinal edges of the lower face.