Patent ID: 6704534
Filing Date: 2004-03-09
Classification: G03G

Abstract:
A developing device comprising:a developing container for containing therein a developer provided with a carrier and a toner; conveying means for conveying the developer in said developing container; a developer bearing member for bearing thereon the developer conveyed by said conveying means, said developer bearing member conveying the developer to a developing portion for developing a latent image formed on an image bearing member; magnetic field generating means provided in said developer bearing member for generating a magnetic field, said magnetic field generating means being provided with a first magnetic pole and a second magnetic pole, which form a repulsive magnetic field, wherein said second magnetic pole is disposed downstream of said first magnetic pole in a direction of rotation of said developer bearing member; and regulating means for regulating a layer thickness of the developer on said developer bearing member at a location substantially opposed to said second magnetic pole, wherein a minimum value position of the repulsive magnetic field is nearer to said second magnetic pole than to said first magnetic pole.