| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming apparatus that can suppress the occurrence of cleaning failure in cleaning a toner image for forcible consumption without extending the execution time of toner forcible consumption processing and increasing the size of a belt cleaning device. ! SOLUTION: An image forming apparatus calculates the required consumption based on an output image area ratio for each of four image forming units and defines the total of the consumptions as the total consumption, when a result exceeds a total upper limit, determines the toner adhesion amount of a toner image for forcible consumption in each of the image forming units under the condition to reduce the total consumption to the total upper limit or less, sets each of the image forming units to reflect the difference between the toner adhesion amount and the required consumption to the required consumption in the subsequent toner forcible consumption processing, and transfers toner images for forcible consumption in res |
