| 摘要 |
<p>An ink jet recorder includes a circuit (31) for generating a first trapezoidal driving voltage in synchronism with an external timing signal; a driving circuit (32) for outputting the first driving voltage to a piezoelectric vibrator (17) in response to an external printing signal and outputting a second voltage for generating small pulses to such an extent that ink droplets are not jetted from a nozzle aperture, in synchronism with the timing signal if a non-printing state lasts for one or more cycles; and control means (30) for stopping the application of the small pulses if it lasts more than a predetermined time during an interruption of printing. When the ink droplets are not jetted for more than one cycle, the small pulses are applied to impart fine vibration to a meniscus so as to prevent clogging of the nozzle without generating an ink mist. Moreover, when printing is interrupted and the application of the small pulses continues for more than the predetermined time, the application of the small pulses is stopped so as to prevent the undesirable increase of tackiness of ink at the nozzle that results from fine vibration.</p> |
