An ink jet nozzle assembly for an inkjet printer, having a nozzle and an actuator for ejecting ink through said nozzle; wherein, the actuator has a resiliently contractable chamber. The chamber is a series of arcuate vanes arranged in an annular form around the nozzle opening. Actuation of a thermally...http://www.google.es/patents/US6913346?utm_source=gb-gplus-sharePatente US6913346 - Inkjet printer with contractable chamber
