| 摘要 |
PURPOSE:To maintain always a stable and a uniform developing density by controlling a peripheral speed of a parts for feeding a developer to the same or more than that of a supporting body of the developer. CONSTITUTION:The inter-relationship between the peripheral speed Vd of the supporting body of the developer and that Vp of the parts for feeding the developer is determined so as to be Vd<=Vp. Thus, the sufficient amount of the developer is always fed to the supporting body of the developer. Even if excess amount of the developer is consumed due to a copy of a solid black portion, a stable copy density is obtd. |
