Patent ID: 8582995
Filing Date: 2013-11-12
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a photosensitive member; charging means for electrically charging said photosensitive member; exposure means for exposing to light said photosensitive member electrically charged by said charging means to form an electrostatic image; developing means for developing the electrostatic image with toner; detecting means for detecting a density of a toner image formed by said developing means; executing means for executing an operation in a mode in which a first toner patch and a second toner patch are formed and an image forming condition is adjusted on the basis of the detected densities of the first and second toner patches; and control means for effecting, during the execution of the operation in the mode, control so that the first toner patch is formed by applying to said developing means a first voltage having an absolute value of more than 0 V while keeping a surface potential of said photosensitive member at 0 V and so that the second toner patch is formed by charging said photosensitive member to a predetermined potential which is not 0 V by said charging means and then by applying to said developing means a second voltage having an absolute value which is larger than the predetermined potential with substantially no emission of light from said exposure means.