Patent ID: 8831467

Claim:
An image-forming apparatus, comprising: a rotatable photoreceptor; a charging device configured to charge a surface of the photoreceptor to be a target charge potential; an exposure device configured to expose a charged portion on the surface of the photoreceptor to form an electrostatic latent image; a developing device configured to develop the electrostatic latent image using toner to form a toner image; a transfer device configured to apply a transfer bias between the photoreceptor and a transfer member by applying an electrical potential of opposite polarity to the target charge potential to the transfer member facing the photoreceptor, and transfer the toner image on the photoreceptor onto a body to be transferred by the transfer bias; a neutralization device configured to neutralize the surface of the photoreceptor by irradiating the surface with neutralization light after the transferring; and a pre-rotation device configured to perform a pre-rotation process which rotates and drives the photoreceptor without applying the transfer bias while performing the charging process by the charging device and the neutralization process by the neutralization device before the formation of the electrostatic latent image by the exposure device, and to maintain the pre-rotation process up to the number of rotation times in which an absolute value of the charge potential of the photoreceptor becomes a first predetermined reference value or more, wherein the pre-rotation device maintains the pre-rotation process up to the number of rotation times in which a temporal change in the charge potential of the photoreceptor becomes a second predetermined reference value or less after reaching the number of rotation times in which the absolute value of the charge potential of the photoreceptor becomes the first predetermined reference value or more.