An ink reservoir has an air bag, a housing with an ink reservoir, an elastic constraining device for constraining the air bag to prevent the seepage of ink by way of back-pressure, an active shaft movably installed in the ink reservoir, and a plugging device engaged with the active shaft for plugging...http://www.google.fr/patents/US20020044182?utm_source=gb-gplus-shareBrevet US20020044182 - Ink reservoir with a pressure adjusting device
Numéro de demande: 09/683,458 Numéro de publication: US 2002/0044182 A1 Date de dépôt: 3 janv. 2002 Brevet délivré: US6533403 ( Date de délivrance 18 mars 2003)
