Patent ID: 6183065
Filing Date: 2001-02-06
Classification: B41J

Abstract:
An electrostatic ink jet recording device comprising:a recording head for moving between a printing area and a non-printing area, said recording head having an ink chamber for receiving therein liquid ink containing electrified toner particles, and a plurality of recording electrodes, disposed in operative relationship with the liquid ink, for ejecting the electrified toner particles when said recording head resides in said printing area;a counter electrode disposed opposite to said plurality of recording electrodes; anda control unit for applying a non-zero bias signal to all of said recording electrodes and additionally applying a recording signal to a selected group of said recording electrodes with respect to said counter electrode, said bias signal being comprised of a pulse train and said recording signal being comprised of a constant voltage signal, said bias signal being applied to said recording electrodes both when said recording head is located in said printing area and when said recording head is located in said non-printing area.