Patent ID: 8867938
Filing Date: 2014-10-21
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a rotatable photosensitive member; an image forming unit configured to form a toner image on the photosensitive member; a transfer member configured to transfer a toner image on the photosensitive member to a transfer material at a transfer portion; an optical sensor disposed downstream of the image forming unit and upstream of the transfer member in a rotating direction of the photosensitive member, and configured to detect an adjustment toner image formed by the image forming unit by irradiating the photosensitive member with light; a voltage application member configured to apply a voltage on the transfer member; an adjustment unit configured to adjust image forming conditions of the image forming unit based on a result of the detection by the optical sensor; and an execution unit configured to execute a voltage application mode for applying, in the case where the adjustment toner image, which is longer than a predetermined value that is greater than or equal to a circumferential length of the photosensitive member in the rotating direction of the photosensitive member, is to be formed, a voltage of a same polarity as a charge polarity of toner and less than a discharge start voltage to the transfer member while a region of the photosensitive member which the optical sensor has irradiated with light passes through the transfer portion, and a voltage of the same polarity as the charge polarity of the toner and greater than or equal to the discharge start voltage to the transfer member while the photosensitive member rotates at least once after the region of the photosensitive member which the optical sensor has irradiated with light passes through the transfer portion.