发明申请
- 专利标题： Carrier and developer for latent electrostatic image development, container housing developer, image forming process, image forming apparatus, and processing cartridge
- 专利标题（中）： 用于静电潜像显影的载体和显影剂，容器外壳显影剂，成像工艺，成像设备和处理盒
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申请号： US11449808申请日： 2006-06-09
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公开(公告)号： US20060228641A1公开(公告)日： 2006-10-12
- 发明人: Kousuke Suzuki , Tomio Kondou , Masahide Yamashita
- 申请人： Kousuke Suzuki , Tomio Kondou , Masahide Yamashita
- 优先权： JP2003-068789 20030313; JP2003-333794 20030925; JP2003-397997 20031127; JP2003-434900 20031226
- 主分类号： G03G9/107
- IPC分类号： G03G9/107
摘要：
A carrier for electrostatic development contains a core particle and a coating layer covering the core particle, and the core particle is a ferrite particle containing at least one of Zr in an amount of 0.005% by mass to 5% by mass and Bi in an amount of 0.001% by mass to 1% by mass. The carrier shows a sufficient resistance, is stably charged over a long period of time, can avoid roughness and irregular density in halftone images, prevents deposition of the carrier particles on a photoconductor, can satisfactorily reproduce character images and can produce high-quality images over a long period of time. The carrier is usable for constituting a developer, a container housing the developer, an image forming apparatus and process, and process cartridge using the developer.