Patent ID: 7918550

Claim:
An ink jet cartridge for an ink jet printing device, the cartridge comprising: a cartridge body operable to store ink jet printer ink for dispensing from the cartridge; a dispensing outlet in an extended head portion of the cartridge body operable to permit the ink to be dispensed from the cartridge body; a first foam portion positioned immediately adjacent to the dispensing outlet in the extended head portion and operable to retain the ink within the cartridge body in fluid communication with the dispensing outlet until dispensed from the cartridge body; a second foam portion; and at least one membrane permanently disposed between the first foam portion and the second foam portion, wherein the at least one membrane is operable to inhibit ink flow between the first foam portion and the second foam portion during printing such that the second foam portion is prevented by the membrane from receiving fluid, the first and second foam portions residing laterally in a common compartment in the cartridge body under a common lid.