METHOD FOR CONTROLLING AMOUNT OF REVERSE POLAR OUTER ADDITIVE OF ELECTRONOGRAPH IMAGE FORMING DEVICE

摘要

PURPOSE: A method for controlling an amount of a reverse polar outer additive of an electronograph image forming device is provided to control voltages applied to each image forming member of an electronograph image forming device, and to easily consume a reverse polar outer additive having an opposite polarity to a toner, thereby properly controlling the increased outer additive. CONSTITUTION: By applying the third voltage having the same polarity as a toner to a transfer roller(13), a positive outer additive is moved to the transfer roller(13). Again, a voltage having an opposite polarity to the toner is applied to the transfer roller(13), to transmit the outer additive to a photosensitive drum(9). As the photosensitive drum(9) rotates, the outer additive is cleaned by a blade(17).