| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of setting several image forming conditions without causing the increase of a downtime. SOLUTION: The sum of lengths LA, LB, LC and LD of several patches R1, Dm, R2 and Dh in the rotating direction of a carrying belt 1 is set equal to or below the length obtained by multiplying the circumferential length L0 of the carrying belt 1 by the number of installed detection sensors 13. |
