| 摘要 |
PURPOSE:To enhance electric chargeability of a resin carrier without weakening magnetic force by fixing a charge controller to the surface of the resin carrier. CONSTITUTION:The binary developer comprises insulating toner particles and the magnetic carrier obtained by dispersing a fine magnetic powder into a binder resin to form the resin carrier and fixing the charge controller to the surface of this resin carrier, thus permitting the action of the charge controller to be effectively exhibited because it is fixed only to the surface but the magnetic powder is distributed in the inside of the resin, and undesired dropout of the charge controller to be prevented during mixing the carrier with the toner. |
