| 摘要 |
In view of the fact that the ink viscosity is high when atmospheric temperature is low whereas the same is low when the atmospheric temperature is high, two types of driving signals are selectively applied to an actuator depending on the temperature so that ink droplets are ejected at a constant speed regardless of change in atmospheric temperature. Alternatively, when the temperature is below a predetermined value, ink droplets are ejected while heating the ink filling an ink channel. When the ink temperature is increased above the predetermined value, heating of the ink is halted.
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