发明名称 |
APPARATUS FOR PREPARING COATING FLUID FOR ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND PREPARATION OF SAME |
摘要 |
PROBLEM TO BE SOLVED: To allow dispersion to proceed rapidly in a dispersion containing particles of Y type phthalocyanine as an electric charge generating material while avoiding the change of the crystal form of the Y type phthalocyanine to A type without requiring the removal of additives and a special post-treatment after dispersion because the use of additives and a special pretreatment are not required before dispersion and carrying out precise control of dispersion conditions and to prepare a coating fluid for an electrophotographic photoreceptor having a reduced average particle diameter. SOLUTION: A dispersion containing an electric charge generating material of <=125μm maximum particle diameter is fed into a bead mill dispersing apparatus with a dispersion chamber 1 containing a rotor which rotates at high speed and beads for dispersion, a circulation tank 3 into which the dispersion enters a feed pipe and a circulation pump 5 for pumping the dispersion from the tank 3 into the dispersion chamber 1 and a discharge pipe which connects the chamber 1 to the tank 3. The dispersion is circulated between the chamber 1 and the tank 3 and the objective coating fluid for the production of an electrophotographic photoreceptor containing fine particles of the electric charge generating material is prepared.
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申请公布号 |
JP2000112155(A) |
申请公布日期 |
2000.04.21 |
申请号 |
JP19980297590 |
申请日期 |
1998.10.06 |
申请人 |
RICOH CO LTD |
发明人 |
YAMAZAKI JUNICHI;NIIMI TATSUYA |
分类号 |
G03G5/00;G03G5/05;G03G5/06;(IPC1-7):G03G5/05 |
主分类号 |
G03G5/00 |
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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