Multi-color copying machine

摘要

A copying machine which includes several developing units adapted to accommodate respective masses of powdery developers of different colors; a specifying unit for specifying a position, which will constitute the boundary of a copying area, in a direction conforming to the direction of scan of a scanning system; a copying contorl unit for selectively switching and driving the developing units in correspondence with the position of the boundary of the copying area specified by the specifying unit, so as to accomplish a multi-color copying during one cycle of copying operation, and an eraser for erasing a predetermined range in the scanning direction in reference to the position of the boundary of the copying area specified by the specifying unit.