Image forming apparatus

摘要

An image forming apparatus includes an image carrier, a rotation-position detector, a development device, a transfer unit, a density sensor, and an image-forming-condition determination unit. The density sensor senses a density of a toner image on a transfer body. The image-forming-condition determination unit forms an image pattern, acquires periodical density variation information sensed by the density sensor and detection information of the rotation-position detector, and determines an image forming condition based on the periodical density variation information and the detection information acquired. The image carrier and the transfer body are different in linear velocity in an image formation in which the toner image is transferred to a recording medium. The image carrier and the transfer body are controlled to be equal in linear velocity in an information acquisition in which the image-forming-condition determination unit acquires the periodical density variation information and the detection information.

主权项

1. An image forming apparatus, comprising:
a rotary image carrier having a surface to carry an electrostatic latent image formed thereon; a rotation-position detector to detect a rotation position of the image carrier; a development device to develop the electrostatic latent image to form a toner image; a transfer unit to transfer to a transfer body the toner image developed by the development device; a density sensor to sense a density of the toner image on the transfer body; and an image-forming-condition determination unit to form an image pattern, acquire periodical density variation information sensed by the density sensor and detection information of the rotation-position detector, and determine an image forming condition based on the periodical density variation information and the detection information acquired, wherein the image carrier and the transfer body are different in linear velocity during an image formation process in which the toner image is transferred to a recording medium, and wherein the image carrier and the transfer body are controlled to be equal in linear velocity during an information acquisition process in which the image-forming-condition determination unit acquires the periodical density variation information and the detection information.