Patent ID: 6208321
Filing Date: 2001-03-27
Classification: B41J

Abstract:
An electrostatic ink jet recorder for recording an image on a recording medium by applying an electric field to ink containing charged toner particles and ejecting an ink drop based on a Coulomb force acting on said toner particles, said electrostatic ink jet recorder comprising:an electrophoresis electrode for causing the toner particles to concentrate at ejection ports;a plurality of ejection electrodes each for ejecting the toner particles concentrating at a particular one of said ejection ports;a counter electrode facing said ejection ports with the intermediary of the recording medium; anda plurality of auxiliary electrodes adjoining said plurality of ejection electrodes for intensifying electric fields;said plurality of ejection electrodes being divided into a plurality of first groups and applied with a voltage group by group, said plurality of auxiliary electrodes being divided into a plurality of second groups and applied with a voltage group by group,wherein one of said first groups contains at least two of said ejection electrodes, and one of said second groups contains at least two of said auxiliary electrodes.