Patent ID: 6898406
Filing Date: 2005-05-24
Classification: G03G

Abstract:
1. A developing device, comprising: a developing zone containing wherein said developer is capable of rising in a form of a magnet brush with a magnetic pole for development, and wherein said developer carrier is capable of moving in a same direction as, but at a higher linear velocity than, said image carrier to thereby cause said magnet brush to rub said surface of said image carrier to thereby develop said latent image, wherein a linear velocity of said developer carrier in the developing zone is 150 mm/sec or above, but below 500 mm/sec, wherein an amount of the developer deposited on said developer carrier and conveyed to the developing zone is between 65 mg/cm wherein a magnetic flux generated on the surface of said developer carrier in the developing zone by the magnetic pole for development has a flux density having an attenuation ratio of 40% in a direction normal to said surface of said developer carrier, wherein the flux density in the direction normal to the surface of said developer carrier, as measured on said surface of said developer carrier, is between 100 mT and 200 mT, and wherein the magnetic grains have a saturation magnetization value of 40×10