| 摘要 |
PROBLEM TO BE SOLVED: To prevent the dirt of a printed picture derived from toner heaping or the like on a developing roll at the time of consecutive extra fine imaging provided with a little number of dots. SOLUTION: As for this device, on detecting the extra fine imaging by the extra fine imaging decision part 31, a dummy image is produced by the dummy image producing part 15. The decision by the extra fine imaging decision part 31 is executed when the printing number decision part 0 decides the number of printing reaches a specific amount or at the time of the inter image. The toner image of the dummy image formed on a photoreceptor is removed by a cleaner device however preferably, transferred on a recording paper in order to reduce the load of cleaner device. A paper haul processing part 34 executes the paper haul demand in order to draw out the recording paper for the dummy image transfer. The dummy image may be formed to the extent of the specified number however preferably, the number of deficient dots corresponding to the reference image coverage calculated by the number of deficient dots calculating part 33 may be turned to the dummy image. |
