| 摘要 |
PROBLEM TO BE SOLVED: To electrify the surface of a photoreceptor at a uniform electrifying potential by preventing the occurrence of electrifying unevenness, in an image forming device for electrifying an a-Si-based photoreceptor by using a plurality of electrifying devices. SOLUTION: A main electrification bias applying power source 32 and an auxiliary electrification bias applying power source 33 apply specified electrification biases to a magnetic brush electrifier 30 and an electrifying roller 31 so that the ratio of the absolute value of a current I2 flowing from the magnetic brush electrifier 30 to the photoreceptor 1 to all currents flowing from all of electrifying devices to the photoreceptor 1 is≤25 (%), thereby preventing the occurrence of electrifying unevenness to electrify the surface of the photoreceptor 1 at the uniform electrifying potential. COPYRIGHT: (C)2004,JPO
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