| 摘要 |
PURPOSE:To prevent the deterioration of print quality and to provide high durability of a developing container to achieve free maintenance by effectively removing paper power introduced to a developer slide area between the photosensitive drum in which an exposure means is inserted and the developing sleeve which incorporates a magnet composing body. CONSTITUTION:The photosensitive drum 1 is constituted in such a manner that it can rotate normally and reversely. Also, toner image transfer means 4A and 4B are arranged on periphery of the photosensitive drum, at its both sides between which a developing means 3 is situated. According to the normal/ reversal rotation of the phosensitive drum 1, the position exposure which is carried out by the exposure means 2 inserted in the drum and the position of the magnetic pole of the fixed magnet-composing body 31 included in a developing sleeve 30 are changed by a prescribed degrees of angle. |
