| 摘要 |
PROBLEM TO BE SOLVED: To accurately perform calibration and measurement, even in the case that a calibration plate of a toner sticking quantity measuring instrument is soiled. SOLUTION: This image forming device is provided with the calibration plate replacing device making an influence of the calibration plate soiling possible to be eliminated, by means of automatically replacing the calibration plate, when a controlling part detects the soil of the calibration plate, or calibration plate cleaning means removing an influence of the calibration plate soiling similarly, by means of cleaning the calibration plate surface. |
