| 摘要 |
PURPOSE: To prevent a void at the leading edge of an image and the deterioration of density caused by continuous developing operation. CONSTITUTION: When the radius of a supply roll 112 supplying developer to a developer carrier 110 is denoted by (r)mm, a minimum gap between the supply roll 112 and a partitioning wall 115 between a developing chamber and a developer storing chamber by (d)mm, a horizontal direction distance between a regulating position by a regulating member 113 regulating a developer layer on the developer carrier and the center of the supply roll by Lmm, a distance between a supplying position by the supply roll 112 and the regulating position by the regulating member 113 by (h)mm, and the angle of repose of the developer byθdeg., L×tanθ<=h<=(L+r+d)×tanθis satisfied. |
