Patent ID: 7127199
Filing Date: 2006-10-24
Classification: G03G

Abstract:
1. A developing device for developing a latent image formed on an image carrier, said developing device comprising: a rotatable, nonmagnetic developer carrier; and means for generating a magnetic field in a developing zone where said developer carrier faces the image carrier, said magnetic field causing a developer deposited on said developer carrier to rise in the form of a magnet brush, wherein a first magnetic pole for development is located upstream of a closest position where said developer carrier and the image carrier are closest to each other in a direction of rotation, a second magnetic pole is located just downstream of the first magnetic pole and a radial flux density of said second magnetic pole is higher than a radial flux density of said first magnetic pole, and a magnetic force, as measured on a surface of said developer carrier, continuously increases from a position of the first magnetic pole toward a position where the magnet brush finally leaves the image carrier.