Drop-on-demand ink-jet printing apparatus.

摘要

A drop-on-demand ink-jet printing apparatus comprises, an ink chamber connected to an ink supply means and filled with ink supplied by the ink supply means, the ink chamber j including a nozzle for projecting an ink droplet and an elastic surface for changing the volume of the ink chamber by its deflection, a plurality of pressure vibration modes having a plurality of antinodes being generated within the ink chamber, and a piezoelectric transducer attached to the elastic surface at a position corresponding to one of the antinodes of one of the pressure vibration modes, whereby the piezoelectric transducer excites one of the pressure vibration modes in the ink chamber and projects the ink droplet from the nozzle.