Patent ID: 8449058
Filing Date: 2013-05-28
Classification: B41J

Abstract:
1. A method for driving a drop ejection device having an actuator and a nozzle, comprising: applying a multi-pulse waveform to the actuator, the waveform having at least two drive pulses and at least one break off pulse following the at least two drive pulses; building a drop of a fluid with the at least two drive pulses; and accelerating the break off of the drop forming at the nozzle using the at least one break off pulse without causing formation of a sub-drop, wherein the drop ejection device to operate at a frequency of at least thirty kilohertz, wherein at least one of the at least two drive pulses is tuned at approximately a maximum drop velocity in the frequency response of the drop ejection device and the break off pulse is tuned at approximately a minimum drop velocity in the frequency response of the drop ejection device.