Patent ID: 6070037
Filing Date: 2000-05-30
Classification: G03G

Abstract:
An image forming apparatus, comprising:an image bearing member; anda developing device positioned to supply a developer to a developing position of the image bearing member, to develop a latent image on a surface of the image bearing member, wherein the developing device includes:a developing device casing;a rotatable developer bearing member in the developing device casing and having a magnet therein, the developer bearing member being so positioned in the developing device that upon rotation of the developer bearing member, the developer bearing member bears developer on a surface thereof by a magnetic force of the magnet and carries the developer towards the developing position;a limiting member made of a non-magnetizable material and positioned facing the developer bearing member so as to limit a thickness of a layer of the developer borne on the developer bearing member; anda magnetizable member having a protruding portion positioned to face a part of the developer bearing member that does not have the magnet therein, and a recessed part positioned to face a part of the developer bearing member that has the magnet therein, the magnetizable member being disposed upstream of the limiting member in a developer conveying direction of the developer bearing member, wherein the protruding portion is nearer to the surface of the developer bearing member than is the limiting member and the recessed part is more distant from the surface of the developer bearing member than is the limiting member.