| 摘要 |
PROBLEM TO BE SOLVED: To prevent a foreign matter from mixing in the surface coating film of an electrifying roll used in an electrophotographic developing device. SOLUTION: The coating film is formed by filtering a coating material to be used by using a filter whose aperture part is≤100μm and applying the coating material on the surface of the elastic layer of the electrifying roll under environment where temperature is 0 to 30°C and humidity is≤80%RH. COPYRIGHT: (C)2003,JPO
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