发明名称 |
Carrier for use in electrophotography, two component-type developer and image forming method |
摘要 |
A two component-type developer for electrophotography showing improved electrophotographic performances and also free from carrier adhesion (undesirable carrier transfer to the photosensitive member and recording materials) is constituted by using a magnetic carrier comprising a soft magnetic material of 5-100 mu m in particle size. The carrier has a bulk density of at most 3.0 g/cm3, and magnetic properties including: a magnetization of 30-150 emu/cm3 under a magnetic field strength of 1000 oersted, and relationships (1) and (2): | sigma 1000- sigma 300|/ sigma 1000</=0.40 (1) wherein sigma 1000 and sigma 300 denote magnetizations (emu/cm3) under magnetic field strengths of 1000 oersted (Oe) and 300 oersted (Oe), respectively, and 0.15 (emu/cm3.Oe)</=| sigma 100- sigma r|/100 (Oe) (2) wherein sigma 100 and sigma r denote magnetizations (emu/cm3) under magnetic field strengths of 100 (Oe) and zero (Oe), respectively.
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申请公布号 |
US5439771(A) |
申请公布日期 |
1995.08.08 |
申请号 |
US19930103034 |
申请日期 |
1993.07.28 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
BABA, YOSHINOBU;AMANO, YASUKO;ITABASHI, HITOSHI |
分类号 |
G03G9/10;G03G9/107;(IPC1-7):G03G9/107 |
主分类号 |
G03G9/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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