IMPROVEMENTS RELATING TO PULSED DROPLET DEPOSITION APPARATUS

摘要

The selected ink channels of a drop-on-demand ink jet printer are caused to expand and then contract, ejecting ink droplets by the application of unipolar voltages first to selected channels and then to non- selected channels. Further unipolar voltages, delayed in time by 2L/c and scaled by a pressure wave reflection coefficient r of the nozzle , effect prompt cancellation of residual pressure waves so that adjacent channels are ready for actuation with minimum delay.