Patent ID: 7970323
Filing Date: 2011-06-28
Classification: G03G

Abstract:
1. A developing device comprising: a developer hearing member configured to feed a developer to an image bearing member while rotating and bearing a layer of the developer thereon to develop an electrostatic latent image on the image bearing member therewith; a developer supplying member, which is contacted with the developer bearing member at a first nip while opposed thereto and which rotates to supply the developer to the developer hearing member; a developer layer forming member, which is contacted with the developer bearing member at a second nip located on a downstream side from the first nip relative to a rotation direction of the developer bearing member to form the layer of the developer on the developer bearing member; and a developer supplying mechanism located over the developer supplying member and the developer bearing member to supply the developer to the developer supplying member, wherein the developer is a nonmagnetic one component developer, wherein a front edge of the second nip and a rear edge of the first nip relative to the rotation direction of the developer bearing member are disposed at locations a and b, respectively, such that 0.8 mm<|a−b|<2.0 mm, wherein |a−b| represents a distance between the location a of said front edge of the second nip and the location b of said rear edge of the first nip relative to the rotation direction of the developer bearing member.