Electrophotographic apparatus having means for avoiding blurring effects caused by idle intervals

摘要

An electrophotographic apapratus which avoids blurred and tainted images caused by toner being heated during idle periods by a heated photosensitive drum. In one aspect a developing roller is separated from the drum during the idle periods. In another aspect toner is forcibly removed from the developing roller by application of a reverse bias voltage during the interval between turning on a main switch and the time at which copying becomes possible.