Patent ID: 8615187

Claim:
A developing device that develops an electrostatic latent image formed on a surface of a photoreceptor drum comprising: a developing roller that rotates in a state where a two-component developer is borne on a surface thereof, and supplies a toner to the surface of the photoreceptor drum to develop the electrostatic latent image; a regulating member that regulates a bearing amount of the two-component developer borne on the surface of the developing roller; and a chute that guides the two-component developer regulated by the regulating member to a direction separating from the developing roller, the chute being composed of a rectangular thin plate made of non-magnetic austenitic stainless alloy, and being provided so that one end part in a short side direction thereof faces the surface of the developing roller, the one end part being transformed to a process induced martensitic phase to be made ferromagnetic, and being subjected to magnetic field orientation in an area facing the surface of the developing roller so that a repulsive magnetic field is formed, and so that a part that is folded back through hemming and a part that overlaps the part folded back have a same magnetic pole.