发明授权
- 专利标题: Carrier, two-component developer, and image forming method
- 专利标题(中): 载体,双组分显影剂和成像方法
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申请号: US11268675申请日: 2005-11-07
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公开(公告)号: US07452651B2公开(公告)日: 2008-11-18
- 发明人: Yojiro Hotta , Tetsuya Ida , Wakashi Iida , Akira Hashimoto , Nozomu Komatsu , Yoshinobu Baba
- 申请人: Yojiro Hotta , Tetsuya Ida , Wakashi Iida , Akira Hashimoto , Nozomu Komatsu , Yoshinobu Baba
- 申请人地址: JP
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JP
- 代理机构: Rossi, Kimms & McDowell LLP
- 优先权: JP2004-321564 20041105
- 主分类号: G03G9/00
- IPC分类号: G03G9/00
摘要:
In a carrier comprising carrier particles; each carrier particle comprising a carrier core and a coat layer for coating the carrier core, the carrier core has a ferrite component containing i) a metal oxide having at least one of metallic elements Mg, Li and Ca, the total-sum content of which is 10 to 40 mole % based on the whole ferrite component, and ii) a metal oxide having at least one of metallic elements Mn, Cu, Cr and Zn, the total-sum content of which is 50 to 4,000 ppm based on the whole ferrite component. The carrier has a volume distribution based 50% particle diameter (D50) of from 15.0 to 55.0 μm and a degree of surface unevenness of from 1.05 to 1.30, and the coat layer contains particles; the particles having a number-average primary particle diameter of from 10 to 500 nm.