Patent ID: 7257353

Claim:
A developing apparatus for developing an electrostatic latent image formed on an electrophotographic photosensitive member with a developer in an electrophotographic image forming apparatus, said developing apparatus comprising: a developer accommodating portion configured to accommodate the developer to be supplied to a developing member; a developer stirring member configured and positioned to stir the developer in said developer accommodating portion, said developer stirring member including a rotatable member rotatably provided in said developer accommodating portion, a first stirring rotatable portion provided on said rotatable member, a first movable stirring portion movably provided on said first stirring rotatable portion, a second stirring rotatable portion provided on said rotatable member, and a second movable stirring portion movably provided on said second stirring rotatable portion, and wherein a radius of rotation of said first stirring rotatable portion and a radius of rotation of said second stirring rotatable portion are different from each other, and a part of a stirring region in which said first stirring rotatable portion and said first movable stirring portion stir the developer and a part of a stirring region in which said second stirring rotatable portion and said second movable stirring portion stir the developer, overlap.