| 摘要 |
PURPOSE:To surely correct the difference of developer supply ability between plural developing devices in simple constitution by differentiating the surface shapes of developing sleeves in developing devices so as to make almost equal developer supply amount possessed by each developing device. CONSTITUTION:The title device is provided with plural developing devices D1 and D2 arranged facing a photosensitive body 1. The developing sleeves D12 and D22 are formed on the surface shapes each of which has different developer holding power so that the developing sleeves D12 and D22 provided on developing devices D1 and D2, respectively, have almost equal developer supply ability. Thus, the difference of the developer supply ability between plural developing devices D1 and D2 can surely be corrected in simple constitution. |
