Patent ID: 7787808
Filing Date: 2010-08-31
Classification: G03G

Abstract:
1. A developing device which develops an electrostatic latent image formed on an image bearing member, with use of two-component developer, the developing device comprising: a developer bearing member capable of rotating around a predetermined first axis line, the developer bearing member having a development sleeve by which the two-component developer is borne and delivered to the image bearing member, and a magnet roller for generating magnetism provided in the development sleeve; a layer thickness-regulating member for regulating a layer thickness of the two-component developer borne on the development sleeve, the layer thickness-regulating member facing the development sleeve; a magnetism-generating member for generating magnetism, which is disposed upstream of the layer thickness-regulating member in a direction where the development sleeve rotates, the magnetism-generating member facing the development sleeve and being displaceable; and a control unit for controlling an amount of displacement of the magnetism-generating member relative to the development sleeve.