| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device which can copy or print a subject copy with no change such as concentration decrease with the lapse of time and no concentration unevenness in the back and forth direction of the apparatus even in the case subject copies with high image density are copied or printing is continuously carried out at high image density. SOLUTION: When it is indicated that a subject copy has a high image density by a mode setting apparatus 32 and at the same time when it is detected that a count number is equal to a previously set cycle-out number by a comparison means, a control apparatus 30 interrupts the job and at the same time clears the previously set cycle-out number and when it is determined that the concentration is a standard concentration by a concentration comparison means, the apparatus 30 instructs to continuously carry out the job and when it is determined that the concentration is the standard concentration or lower, the apparatus 30 instructs to rotate motors 34, 54 and supply toners from toner boxes 36, 56. |
