Developing apparatus

Details Developing apparatus Developing apparatus

2007-12-10

2009-12-15

Gray, David M (Department: 2852)

Electrophotography

Image formation

Development

C399S255000, C399S252000, C399S258000, C399S119000, C399S110000, C399S107000

Reexamination Certificate

active

07634215

ABSTRACT:
A developing apparatus includes: an agitating chamber agitating a developer; a developing chamber provided with an inlet to which the developer is supplied from the agitating chamber and an outlet from which the developer is returned to the agitating chamber; a developer carrying member; a rotatable developer supplying member supplying the developer to the developer carrying member; a developer conveying member, provided above the center of rotation of the developer supplying member in the developing chamber, for conveying the developer in a longitudinal direction of the developer carrying member, wherein, in a vertical cross-sectional area of a region vertically above the center of rotation of the developer supplying member of the developing chamber, excluding a developer conveying region by the developer conveying member, a cross-sectional area S1upstream in the developer conveying direction and a cross-sectional area S2downstream in the developer conveying direction satisfy a relationship of S1<S2.

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