Patent ID: 7292802
Filing Date: 2007-11-06
Classification: G03G

Abstract:
1. A developing apparatus comprising: a case having a slit-shaped opening and a holder, which communicates with the opening, for holding developer; a wall portion which is provided at the case and extends along a longitudinal direction of the opening, perpendicular to a communication direction between the opening and the holder; a developer retainer which is arranged along the longitudinal direction of the opening and supported at a side of the wall portion opposite to the holder in the communication direction so as to be rotatable; a blade, which is arranged along the wall portion between the wall portion and the developer retainer and has a first end portion side that is one end arranged opposite to the wall portion and a second end portion side that is the other end pressing the developer retainer, for regulating a layer thickness of developer to be retained by the developer retainer; a supporting member, which is arranged at an opposed face of the blade and between the blade and the wall portion, for supporting the blade; and a sealing member, which is arranged at the opposed face so as not to be overlapped with the supporting member and integrally has side portions respectively extending in a direction perpendicular to the longitudinal direction at longitudinal end portions of the blade and a connecting portion connecting the side portions at a longitudinal center portion, for sealing a space between the wall portion and the blade.