Patent ID: 7463839

Claim:
An image forming apparatus comprising: an image bearing member; a toner image forming unit for forming a toner image on said image bearing member; a transfer unit for transferring the toner image formed on said image bearing member onto a recording material; adjusting means for adjusting a condition of said toner image forming means based on a detection of an adjustment toner image formed on said image bearing member and not formed on a recording material; a cleaning member for cleaning toner on said image bearing member; a container for containing the cleaned toner; a detecting device for detecting that an amount of toner in said container has reached a predetermined amount; and a processing portion that counts an amount of data relating to images formed on said image bearing member and calculates an accumulation count value, wherein the accumulation count value is obtained by accumulating a value corresponding to an amount of data relating to images formed on a recording material after the amount of toner in said container has reached the predetermined amount, a value multiplied an amount of data relating to the adjacent toner images formed after the amount of toner in said container has reached the predetermined amount by a first coefficient, and a value multiplied an amount of data relating to a toner image which is not formed on a recording material by an abnormal condition after the amount of toner in said container has reached the predetermined amount by a second coefficient not equal to the first coefficient, and wherein when the accumulation count value calculated by said processing portion exceeds a preset value, said processing portion prohibits image formation.