发明授权
US5419994A Carrier for electrophotographic developer, process for preparing the
same and developer prepared by using said carrier
失效
用于电子照相显影剂的载体，其制备方法和通过使用所述载体制备的显影剂
- 专利标题： Carrier for electrophotographic developer, process for preparing the same and developer prepared by using said carrier
- 专利标题（中）： 用于电子照相显影剂的载体，其制备方法和通过使用所述载体制备的显影剂
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申请号： US939989申请日： 1992-09-03
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公开(公告)号： US5419994A公开(公告)日： 1995-05-30
- 发明人: Toshio Honjo , Yuji Sato , Kanao Kayamoto , Masahiro Ogata
- 申请人： Toshio Honjo , Yuji Sato , Kanao Kayamoto , Masahiro Ogata
- 申请人地址： JPX Kashiwa
- 专利权人： Powdertech Co., Ltd.
- 当前专利权人： Powdertech Co., Ltd.
- 当前专利权人地址： JPX Kashiwa
- 优先权： JPX1-325865 19891218; JPX2-243752 19900917
- 主分类号： G03G9/10
- IPC分类号： G03G9/10 ; G03G9/107
摘要：
An iron carrier for an electrophotographic developer, the carrier having a mean particle diameter of 25 to 40 .mu.m, a magnetization of at least 160 emu/g at 3000 Oe, an apparent density of 3.0 to 4.2 g/cm.sup.3, a percentage sphericity of at least 80%, and a specific surface area of at least 350 cm.sup.2 /g as determined by an air permeation method; a process for preparing the carrier by a plasma method; and an electrophotographic developer comprising the carrier.
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