Patent ID: 7192679
Filing Date: 2007-03-20
Classification: G03G

Abstract:
1. A carrier comprising carrier particles, said particles comprising a magnetic core and a resin layer covering said core, wherein said carrier particles have a weight average particle diameter Dw which is 22–32 μm and a number average particle diameter Dp which meets with the following condition: and (1) wherein the amount of said carrier particles having a particle diameter of less than 20 μm is no more than 7 wt % of the total weight of said particles, (2) wherein the amount of said carrier particles having a particle diameter of less than 36 μm is 90–100 wt % of the total weight of said particles, and (3) wherein the amount of said carrier particles having a particle diameter of less than 44 μm is 98–100 wt % of the total weight of said particles.