| 摘要 |
PURPOSE:To retain the recording density and the deflecting amount of charged ink particles constant in an ink jet recorder by controlling the pressure of pressurized ink supplying means by the output signal from speed detecting means and charging voltage or deflecting voltage by the output signal from deflecting position detecting means. CONSTITUTION:Charging and deflecting electrodes 7 and 9 are arranged between a recording paper 11 and a nozzle 5 through a filter 2 and a pump 3 from an ink tank 1. A pulsating current of predetermined frequency is applied from a clock pulse oscillator 14 through an excitation signal generator 15 and an amplifier 13 to the ultrasonic vibrator of the nozzle 5 to thereby produce ink particles, and charge is imparted to the ink particles by the electrode 7 connected to a charge signal generator 16, a phase setting circuit 19 and a charge controller 20, etc. A pump drive circuit 29 is controlled by the output signal from a speed detecting circuit 30 and the charging voltage or deflecting voltage is controlled by the output signal from a deflecting position detecting circuit 28 to thereby retain the deflecting amount of the ink particles and recorded picture without variable density. |
