An ink jet recording apparatus includes an ink jet head, a body frame, and a cover plate. The ink jet head has a plurality of nozzles that eject ink onto a recording medium, a plurality of pressure chambers provided in association with the nozzles, and a plurality of pressure generating portions that...http://www.google.com.au/patents/US20020105567?utm_source=gb-gplus-sharePatent US20020105567 - Ink jet recording apparatus
