| 摘要 |
PROBLEM TO BE SOLVED: To ensure steady image formation for a long time, in an image forming device having a rotary type developing unit 3. SOLUTION: After toner is transferred to a recording material 6 during one rotation of a transfer body 5, a toner patch is formed during the subsequent rotation of the transfer body 5 and is read by an optical means. Based upon a difference between the read image information and reference image information, image forming conditions are corrected. |
