Electrophotographic image forming apparatus capable of developing normal and inverted images

摘要

A transfer belt for use in an electrophotographic image forming apparatus is so arranged as to pass through a gap between a photoconductor and a transfer charger provided opposite to the photoconductor, and a second transfer charger is arranged outside the transfer belt at the downstream of a first transfer charger in the transporting direction of the transfer belt. The first transfer charger transfers an image on the photoconductor onto the transfer belt or onto the surface of a transfer material being properly transported thereto, while the second transfer charger transfers a transferred image on the transfer belt onto the back of the transfer material being transported on the transfer belt thus enabling to form an image only on one side or on both sides of the transfer material.