Control system for applying biasing and recording signals to recording electrodes of an electrostatic ink jet recording device

A method for operating an electrostatic ink jet recording device of the type which includes a recording head moveable across a printing area, said recording head having an ink chamber for receiving a liquid ink containing electrified toner particles and a plurality of recording electrodes disposed in operative relationship with said ink for ejecting said electrified toner particles upon the application of a sufficient voltage thereto and a counter electrode disposed opposite to said plurality of recording electrodes, said method comprising:

• continually applying a bias signal in the form of a pulse train to each of said recording electrodes as said recording head is moved across said printing area, said bias signal being insufficient to cause said electrified toner particles to be ejected from said recording head;
• and
• periodically applying a recording signal in the form of a constant voltage to at least some of said recording electrodes as said recording head moves across said printing area so that both said bias signal and said recording signal are periodically simultaneously applied to said at least some recording electrodes to selectively cause said electrified toner particles to be ejected from said recording head towards said counter electrode.