Patent ID: 7997690

Claim:
An inkjet printer comprising: a printhead having a plurality of nozzles assemblies, each nozzle assembly comprising: a nozzle chamber for containing ink, said chamber having a nozzle opening defined in a roof thereof and an ink inlet; and a bend actuator disposed in a moving portion of said roof, said bend actuator being configured for ejecting ink droplets from the nozzle opening by bending towards a floor of the nozzle chamber and generating a positive pressure pulse in said ink; and an ink supply system for supplying ink to said printhead; and pressure-varying means acting on said ink supply system such that a bulk hydrostatic pressure of ink in said ink supply system is variable, wherein increasing said bulk hydrostatic ink pressure increases a volume of said ejected ink droplets, and decreasing said bulk hydrostatic ink pressure decreases a volume of said ejected ink droplets.