An ink cartridge has a first partitioning wall 5 and a third partitioning wall 7 for dividing the inside of a case 2 into a first ink chamber 9 and a second ink chamber 10, and a second partitioning wall 6 for demarcating an atmosphere connection chamber 11. In an upper case cover 3 are formed an ink...http://www.google.fr/patents/US6874874?utm_source=gb-gplus-shareBrevet US6874874 - Ink cartridge and remaining ink volume detection method
Ink cartridge and remaining ink volume detection method
