Silicone resin coated carrier particles for use in a two-component dry-type developer
AssigneeRicoh Company, Ltd.
InventorsNobuhiro Nakayama, Tetsuo Isoda, Yoichiro Watanabe, Mitsuo Aoki
Life of this patent
Estimating the term…
Abstract
Carrier particles for use in a two-component dry-type developer for developing latent electrostatic images are disclosed, which core particle comprises a core particle and a silicone resin layer coated on the core particles, and the silicone resin layer contains an organic tin compound, which serves as a catalyst for hardening the silicone resin layer in the course of the formation of the silicone resin layer on the core particle under application of heat thereto, with a concentration gradient in the direction of the thickness of the silicone resin layer towards the outer surface of the carrier particles.
Claims7
In carrier particles for use in a two-component dry-type developer for developing latent electrostatic images, the improvement wherein the core particle comprises a core particle and a silicone resin layer coated on said core particle, said silicone resin layer containing an organic tin compound, which serves as a catalyst for hardening said silicone resin layer in the course of the formation of said silicone resin layer on said core particle under application of heat thereto, with a concentration gradient in the direction of the thickness of said silicone resin layer towards the outer surface of said carrier particles.
Dependencies are inferred from the claim text.