| 摘要 |
PURPOSE:To prevent the blocking of toner and supply the toner stably by providing an auxiliary blade at the upstream side of a blade provided to a photosensitive body in an electronic developing chamber and near a magnetic roller so as to specify the supply amount of the toner. CONSTITUTION:Toner 2 is supplied to the photosensitive body 5 from the toner case 9 in the developing chamber 1 by the arrow-directional rotation of the magnetic roller 3. The blade 4 is fitted to part of the toner case 9 to specify the height of the toner 2 supplied to the photosensitive body 5. Further, the auxiliary blade 10 is fitted at the upstream side of the blade 4, its front end part is bent toward the upstream side and widened toward an opening part, and the distance D1 to the magnetic roller 3 is made larger than the distance between the blade 4 and magnetic roller 3. Consequently, pressure applied to the blade 4 is reduced to prevent the blocking of the toner 2, supplying the toner smoothly for a long period. |
