Patent ID: 7068952

Claim:
An image forming apparatus, comprising: a movable image bearing body; image forming means for forming a developer image on the image bearing body; transferring means for transferring the developer image formed on the image bearing body toward a moving transferring medium; and control means for controlling the image forming means to form an image based on a dot pattern signal comprising a dot signal having information of a predetermined density, over a normal image forming area on the image bearing body plus an area being further downstream therefrom in the movable image bearing body travel direction, wherein the control means controls the image forming means so as to: form a dot pattern image based on the dot pattern signal regarding the area being further downstream from the normal image forming area; form a composite image from a normal image signal and the dot pattern signal regarding the normal image forming area; and form dot images, regarding a dot area where the normal image signal and the dot signal are overlapped with each other, with a density determined on the basis of a relationship between density information of the normal image signal and information of the predetermined density, on the dot area.