An ink cartridge being vertically mounted comprises a housing that is provided with an ink discharge port, an ink pack that is disposed within the housing, and a pressing mechanism that presses the ink pack. The pressing mechanism includes a contact and a biasing member. The contact is movably disposed...http://www.google.se/patents/US7216963?utm_source=gb-gplus-sharePatent US7216963 - Ink cartridge and ink-jet recording apparatus using the ink cartridge
