Patent ID: 7236731

Claim:
An image forming apparatus, comprising: a plurality of developing devices, each of which contains a developing agent of a single color therein; a photosensitive member that rotates in a peripheral direction; a latent image forming device that forms a latent image on the photosensitive member, the latent image being developed into a visible image on the photosensitive member, the visible image being made of developing agent images of each color using the developing agent of the single color supplied by each of the developing devices; and an image receiver member that contacts the photosensitive member and receives the developing agent images of each color formed on the photosensitive member sequentially and electrically, wherein a developing agent image formed of developing agent having a higher transfer efficiency is transferred earlier than a developing agent image formed of developing agent having a lower transfer efficiency onto the image receiver member, and a transfer bias for transferring the developing agent images from the photosensitive member to the image receiver member is set lower for the developing agent image formed of the developing agent having the higher transfer efficiency.