Patent ID: 7630658
Filing Date: 2009-12-08
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a rotatable image bearing member for carrying a toner image; toner image forming means for forming the toner image on said image bearing member, wherein said image forming means is capable of forming a detection toner image on said image bearing member; transferring means for transferring the toner image from said image bearing member onto a recording material; a cleaning member for removing untransferred toner remaining on said image bearing member after the toner image is transferred onto the recording material, wherein said cleaning member is supplied with a cleaning voltage while contacting said image bearing member; voltage adjusting means for adjusting the cleaning voltage on the basis of a current which flows when said cleaning member is supplied with a predetermined voltage; a detecting device for optically detecting the detection toner image formed on said image bearing member at a detecting position and illuminated with light; image forming control means for controlling a toner image forming condition of said toner image forming means on the basis of a result of detection of said detecting device; detecting device adjusting means for adjusting at least a quantity of the illuminating light or a gain of said detecting device; and a controller for controlling an operation timing of said voltage adjusting means and said detecting device adjusting means so that when said detecting device adjusting means is to be operated before the detecting device detects the detection toner image, said voltage adjusting means is operated, and then said detecting device adjusting means is operated for an area of said image bearing member cleaned by said cleaning means with the voltage adjusted by said voltage adjusting means, and thereafter, said detecting device detects the detection toner image.