| 摘要 |
PROBLEM TO BE SOLVED: To enable toner to be used by recycling without requiring a time for recording, in an electrophotography device forming a two-color image on a photoreceptor. SOLUTION: A toner mixing rate detecting means 47 detecting mixing rate of two color toner used at developing, and an electrophotography device control circuit 50 controlling the drive content of a device main body, based on the detecting means are provided. At recording, the mixing rate of two color toner used at developing is detected by the toner mixing rate detecting means 47, for example at every page, and when it is under a reference value, a two color image is formed on a photoreceptor by the use of two developing devices, and the two color image is simultaneously transcribed so as to be recorded on a sheet, meanwhile, when it is over the reference value, recording operation of a device main body is stopped, or a main developing device is used so as to record it in a single color. At recording, residual toner removed from the surface of the photosensitive body is collected in the main developing device by a toner recovery means so as to use it by recycling. |
