Developing device, image forming unit and color image forming apparatus, both having the developing device
摘要
<p>A developing device used in an image forming apparatus has a developing roller (45) at a lower opening of a hopper, which contacts a photosensitive drum (38) to form a developing portion therebetween. The hopper stores a toner feed roller (64) being in press-contact with the developing roller. A conductive scooping sheet (66) contacts the developing roller in a down stream side of the developing portion. A bias voltage ranging from 0V to -250V is applied to the sheet, so that an attaching force of a residual toner to the developing roller is weakened to make the residual toner being easily rubbed off by the feed roller. <IMAGE></p>
