| 摘要 |
PROBLEM TO BE SOLVED: To discharge ink in a desired discharge and to maintain the quality of an image in a good condition even after use for many years. SOLUTION: An apparatus has a recording head 12 equipped with a polarized piezoelectric element member 24, a front heater 26 which keeps the recording head 12 at a prescribed temperature at least during printing action, and a voltage control part 54 which applies a driving pulse of prescribed voltage to the piezoelectric element member 24 during printing action, discharges ink by expanding and contracting the piezoelectric element member 24 by applying the driving pulse, and performs printing. The piezoelectric element member 24, in the initial polarization treatment, is polarized at a prescribed temperature by applying prescribed voltage during printing action. |
