Patent ID: 9694577
Date: 2017-07-04
CPC Classifications: B41J

Claim:
1. An inkjet head, comprising: a pressure chamber configured to house ink; an actuator configured to be arranged corresponding to the pressure chamber; a plate configured to have a nozzle communicating with the pressure chamber; and a driving circuit configured to drive the actuator, wherein the drive circuit applies an auxiliary pulse signal which contains an expansion pulse for expanding the volume of the pressure chamber and a contraction pulse for contracting the volume of the pressure chamber in such a degree as not to eject an ink drop from the nozzle to the actuator before enabling one ink drop and even continuous multiple ink drops to be ejected from the nozzle communicating with the pressure chamber by applying a drive waveform which contains the expansion pulse and the contraction pulse as a drive pulse signal once or for multiple times to the actuator, in this way, the ejection speed in a case of ejecting one ink drop is almost equal to that of the second drop in a case of continuously ejecting two ink drops.