Patent ID: 7634215
Filing Date: 2009-12-15
Classification: G03G

Abstract:
1. A developing apparatus comprising: 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 carrying the developer to develop an electrostatic image formed on an image bearing member with the developer; a rotatable developer supplying member, provided in the developing chamber, for supplying the developer to the developer carrying member; and a developer conveying member, provided above a 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 cross-sectional area of a region vertically above the center of rotation of the developer supplying member of a region surrounded by the developing chamber in a cross-section perpendicular to a longitudinal direction of the developing chamber, excluding a developer conveying region by the developer conveying member, a cross-sectional area S