Carrier for developer for developing electrostatic latent image, image forming method using same and image forming apparatus using same
AssigneeRicoh Company, Ltd.
InventorsHiroaki Matsuda, Fumihiro Sasaki, Hiroyuki Yoshikawa
Life of this patent
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Abstract
A carrier for an image developer for electrophotography, including core particles, and a coating layer covering each of the core particles, wherein the core particles have a weight average particle diameter of Dv which is 25-45 μm and a number average particle diameter of Dp which meets with the following condition: 1≦Dv/Dp≦1.3, wherein the core particles have such a particle size distribution that particles having a particle diameter of less than 44 μm is at least 70% by weight and particles having a particle diameter of less than 22 μm is not more than 7% by weight.
Claims8
A carrier for a developer for developing an electrostatic image, comprising core particles, and a resin layer covering each of said core particles and containing carbon particles having a number average particle diameter of 0.01-0.1 μm.
Dependencies are inferred from the claim text.