| 摘要 |
PROBLEM TO BE SOLVED: To provide a contact type charger capable of stably charging a photoreceptor over a long term regardless of processing speed without damaging the surface of the photoreceptor. SOLUTION: In the charger 20 having a charging roller 2 charging the photoreceptor 1 while being in contact with the rotating photoreceptor 1, a projection for charging the photoreceptor 1 exists on the surface of the charging roller 2, and the Asker C hardness of the charging roller 2 is≤50, and the universal hardness (HU) of the projection is within 50<HU<150N/mm<SP>2</SP>. COPYRIGHT: (C)2007,JPO&INPIT
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