Image forming apparatus

摘要

An image forming apparatus includes an image forming unit, a charging bias application section, a static eliminating bias application section, and a control section. In the case where the image forming unit causes an image carrier to be rotated without forming an electrostatic latent image on the image carrier, the control section performs a bias control to allow the charging bias application section to apply to a charging section a smaller charging bias than used in forming a toner image and allow the static eliminating bias application section to apply to a static eliminating section a smaller static eliminating bias than used in forming the toner image. The control section performs the bias control to increase respective values of the charging bias and the static eliminating bias every one revolution of the image carrier until the charging bias and the static eliminating bias in forming the toner image are reached.

主权项

1. An image forming apparatus including:
an image forming unit including
an image carrier capable of being driven into rotation,a charging section configured to, upon application of a charging bias thereto, charge a surface of the image carrier being driven into rotation,an exposure section configured to expose the surface of the image carrier charged by the charging section to light to form an electrostatic latent image on the surface of the image carrier,a developing section configured to supply toner to the electrostatic latent image formed on the surface of the image carrier by the exposure section to form a toner image thereon,a transfer section configured to transfer the toner image formed by the developing section to a recording medium,a static eliminating section configured to, upon application of a static eliminating bias thereto, eliminate static charge of the charged image carrier; a charging bias application section configured to apply the charging bias to the charging section; a static eliminating bias application section configured to apply a static eliminating bias to the static eliminating section; and a control section configured to control an operation of the image forming unit, wherein in the case where the toner image is not forming and also where the image forming unit causes the image carrier to be rotated without forming the electrostatic latent image on the surface of the image carrier, the control section performs a bias control to allow the charging bias application section to apply to the charging section a predetermined charging bias smaller than a charging bias to be applied in forming the electrostatic latent image on the surface of the image carrier and then forming the toner image, allow the static eliminating bias application section to apply to the static eliminating section a predetermined static eliminating bias smaller than a static eliminating bias to be applied in forming the toner image, and allow the charging bias application section and the static eliminating bias application section to increase a value of the charging bias and a value of the static eliminating bias, respectively, every one revolution of the image carrier until the values of the charging bias and the static eliminating bias to be applied in forming the toner image are reached.