An ink cartridge includes a container in which ink is accommodated, an ink supply hole which is formed in the container so as to be open in an outer surface of the container, a plurality of atmosphere communication holes which are formed in the container so as to be open in the outer surface of the container,...http://www.google.fr/patents/US7500738?utm_source=gb-gplus-shareBrevet US7500738 - Ink cartridge
