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Hitachi Industrial Equipment Systems Co., Ltd.

Feat of electronics - Ink Jet Printer

To print a character on the product, individual drops of ink are electronically controlled to the correct positions.

Principle of IJP

  • Ink is pressured by an ink supply pump and flows from the ink bottle to the nozzle.
  • The nozzle uses ultrasonic vibration to break a pressurized ink stream into small droplets as it leaves the nozzle.
  • The drops are ejected from the nozzle at high speed. They pass through the charge electrode tunnel / and then on between the deflection electrode.
  • Here the drops are deflected, by an amount which depends on the charge they were given by the charge electrode.
  • After the drops leave the region of the deflection electrode they continue to travel in their new direction until they pass out of the printhead and to the substrate.
  • Drops that aren't required for printing are caught by the gutter and subsequently recycled back to the ink bottle.

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