Patent ID: 6929357

Claim:
An ink cartridge for an ink jet recording apparatus, comprising: a cartridge body for accommodating ink with at least one ink chamber, wherein said cartridge body comprising: at least an air vent for providing fluid communication between said ink chamber and outside air; at least an ink outlet port for supplying the ink from said ink chamber; at least a sealing member provided within said ink outlet port for sealing said ink outlet port; at least a one-way valve disposed within said ink chamber for controlling ink flow, wherein said at least one-way valve is integrally provided with: a foot support portion sealing an interior wall of said ink outlet port; a wall support portion projecting from the interior of said foot support portion; a shoulder support portion bending toward interior of said wall support portion; a head support portion projecting from said shoulder support portion with a through hole; and at least a valve sealing assembly being maintained selectively in contact with said head support portion through hole by a pressure difference.