Patent ID: 8099003

Claim:
An image forming apparatus which has an exposing portion adapted to expose an image bearing member charged by a charging portion based on image information, thereby forming an electrostatic latent image onto the image bearing member and a developing portion adapted to develop the electrostatic latent image formed by the exposing portion by a toner, thereby forming a visible image, and in which transfer paper, on which the visible image formed by the developing portion has been transferred, is conveyed to a fixing portion, and the visible image is fixed onto the transfer paper by the fixing portion, comprising: an extracting portion adapted to extract lateral line image information of a lateral line image extending in a main scanning direction from the image information; a control portion adapted to control a light emission amount of the exposing portion, so as to control an amount of the toner which is developed based on the lateral line image information extracted by the extracting portion in order to prevent a scattering of the toner associated with evaporation of moisture contained in the transfer paper at the time when the lateral line image, which is based on the lateral line image information, is fixed by the fixing portion; and an obtaining portion adapted to obtain paper kind information representing a kind of transfer paper on which the lateral line image is fixed by the fixing portion, wherein the control portion executes the control of the light emission amount differently according to the paper kind information in order to prevent the scattering of the toner associated with the evaporation of the moisture contained in the transfer paper, and wherein when a kind of transfer material indicates transfer paper, the control portion executes an image process for a tail phenomenon as the control of the light emission amount, and when the kind of transfer material indicates an overhead transparency, the control portion executes an image process for an offset phenomenon in which a toner image is electrostatically transferred to the fixing portion as the control of the light emission amount.