Patent ID: 8007088

Claim:
An ink cartridge for use with an ink-jet recording apparatus, comprising: an ink storage chamber storing ink therein; an ink supply port communicating with the ink storage chamber, the ink supply port located and configured to supply ink from within the ink cartridge to the ink-jet recording apparatus, outside the cartridge; a casing including: a first side face having a first opening; a second side face having a second opening, the second side face being opposite to the first side face; an inner wall intersecting with the first side face and the second side face, the inner wall dividing an inner area of the ink cartridge into an upper area and a lower area; an air port; and an atmosphere communication recess defining an atmosphere communication path communicating the ink storage chamber with the air port; and a first film and a second film respectively covering the first side face and the second side face, and respectively sealing the first opening and the second opening, so as to prevent ink from flowing out of the first or second opening, and so that the ink storage chamber is defined in part by the first film and the second film and so that the atmosphere communication path is defined in part by the at least one of the first film and the second film sealing the atmosphere communication recess in the upper area of at least one of the first side face and the second side face of the casing.