| 摘要 |
PROBLEM TO BE SOLVED: To arrange developing devices and image carriers compactly for respective colors and further to reduce the number of times of maintenance care (prolongation of the life of Bk), to make a high image quality color compatible with a high production color and to realize the elimination of downtime in a color image forming device whose black-and-white image ratio is high. SOLUTION: Four developing devices for MCYBk are annularly arranged as a developing rotary, and four image carriers are arranged on the outside of the developing rotary as an image carrier rotary. |
