Patent ID: 6665511
Filing Date: 2003-12-16
Classification: G03G

Abstract:
In a developing device comprising a developer carrier facing an image carrier, which carries a latent image thereon, via a gap to thereby form a developing zone between said developer carrier and said image carrier, said developer carrier comprising a main magnetic pole for development and magnetic poles respectively positioned upstream and downstream of said main magnetic pole in a direction of developer conveyance for conveying a developer, said developer forming a magnet brush on a surface of said developer carrier,said main magnetic pole has an angle of 60Â° or below between opposite pole transition points respectively positioned upstream and downstream of said main pole in said direction of developer conveyance, and a flux density between said main magnetic pole and the magnetic pole downstream of said main magnetic pole in a normal direction has a peak value that is 80% of a maximum flux density of said main pole in said normal direction or above.