| abstract |
PROBLEM TO BE SOLVED: To suppress image quality deterioration caused by a transfer residual toner being unable to form an appropriate electrostatic latent image on the surface of a latent image carrier. Before the transfer residual toner reaches a position facing the charging roller, the toner polarity control device 40 injects charges into the transfer residual toner, and sets the polarity of the transfer residual toner to the normal polarity, that is, the polarity of the charging bias (negative polarity). ) And reverse polarity (positive polarity). Thereby, the transfer residual toner is electrostatically attracted to the charging roller when it reaches the charging region, and is removed from the surface of the photosensitive drum. Therefore, the transfer residual toner is removed from the surface of the photosensitive drum before being conveyed to the latent image forming area. Therefore, when forming a latent image in the latent image forming region, it is possible to suppress the occurrence of a situation in which an appropriate latent image cannot be formed due to the transfer residual toner. [Selection] Figure 1 |