| 摘要 |
PURPOSE:To prevent the breakage of a supply system due to the abnormal high voltage of a pressurized ink, by providing a pressure detecting means and a pump drive control means. CONSTITUTION:By detecting the abnormal high voltage or the lowering in the pressure of a pressurized ink by a pressure detecting means 9 connected between pressurized ink supply control means 1-3 and a supply pump 8, the breakage of a supply system due to abnormal high voltage is prevented while the dripping of the ink at the nozzle surface due to the lowering in pressure is prevented to attain to prevent the shortcircuit of a charged electrode part. |
