| 摘要 |
<p>An ink-jet head for ejecting an ink droplet from an ink nozzle by the charging/discharging between a counter electrode and vibrating plates. The counter electrode comprises a main electrode (10) and an auxiliary electrode (101), which is provided on the ink-nozzle's side in common with the vibrating plates (51). Auxiliary charging between the auxiliary electrode (101) and the vibrating plates (51) is effected to vibrate a meniscus in the ink nozzle (11) without ejecting a useless droplet. Consequently, the ink is prevented from forming a film on the meniscus, and an increase of the viscosity of the ink due to evaporation of the ink solvent is prevented by diffusing the ink in the ink passage.</p> |
