Patent ID: 7393092
Filing Date: 2008-07-01
Classification: B41J

Abstract:
1. An ink cartridge configured to be detachably attached to a printer, said ink cartridge comprising: an ink reservoir in which an ink used for printing is kept; a storage unit having a plurality of ink quantity information memory divisions and a plurality of write complete information storage areas, and the storage unit storing specific information in a readable, writable, and non-volatile manner, a plurality of ink reservoirs, in which a plurality of inks are kept respectively; and a plurality of ink quantity information memory divisions and a plurality of write complete information storage areas provided for each of said plurality of ink reservoirs, wherein the specific information comprises information relating to a quantity of ink kept in said ink reservoir, wherein the plurality of ink quantity information memory divisions store the ink quantity-relating information, and wherein the plurality of write complete information storage areas respectively correspond to the plurality of ink quantity information memory divisions and in each of which write complete information is registered when a writing operation into the corresponding ink quantity information memory division is completed, and wherein said storage unit has two ink quantity information memory divisions, and each write complete information storage area is located following an end-of-writing position in each, of the ink quantity information memory divisions.