Patent ID: 7654646

Claim:
An ink jet head which ejects conductive ink therefrom, comprising: a chamber configured to temporarily store ink; a nozzle plate attached to the chamber, the nozzle plate including a nozzle through which ink is ejected; an actuator configured to eject ink from the chamber, the actuator being provided with an electrode at least a part of which electrically contacts ink in the chamber, the actuator being activated by a current flowing through the electrode from a power supply; a conductive plate including an opening and attached to the nozzle plate such that the nozzle is exposed through the opening; and a current limiter configured to limit the current flowing from the power supply through both the conductive plate and ink in the chamber when ink is purged from the nozzle in a period other than when ink is being ejected, wherein the current limiter is formed of a resistor provided between the conductive plate and the power supply.