Patent ID: 7549737
Filing Date: 2009-06-23
Classification: B41J

Abstract:
1. A piezoelectric inkjet printhead, comprising: a plurality of ink pressure chambers; a plurality of piezoelectric actuators to provide a driving force to the plurality of ink pressure chambers; an ink manifold coupled to the plurality of ink pressure chambers via a corresponding plurality of ink flow paths; a plurality of ink ejector nozzles, wherein each ink ejector nozzle is coupled to a corresponding ink pressure chamber; and a plurality of shutters, wherein each shutter is disposed in a corresponding ink flow path and has a shape to completely cover an outlet of a restrictor, the outlet having a smaller width than a width of the pressure chamber, wherein each shutter is flexible and is adapted to reversibly restrict ink flow from an ink pressure chamber in response to the driving force, and wherein the shutter has a smaller width than the width of the pressure chamber and a greater width than the width of the outlet.