Patent ID: 8406674

Claim:
An image forming apparatus, comprising: a photosensitive medium to be charged with a predetermined potential by a charging member; an exposing unit to expose the photosensitive medium to vary a charging level of the photosensitive medium; a developing unit to form an image for one or more colors on the photosensitive medium; a transfer medium to transfer the image from the photosensitive medium; a cleaning unit to clean the transfer medium; and a controller to control an optical power of the exposing unit to be lower than that during forming of the image and within a range of approximately 0.09 mW to 0.13 mW when a toner band is applied to lubricate at least one of the cleaning unit and the transfer medium, and to control the optical power of the exposing unit so that a density of the toner band is within a range of approximately 60% to 80% of a saturated density of a toner.