| 摘要 |
An apparatus for forming an image is provided, in which a rotational member, such as a photoreceptor drum, is borne by using a rolling bearing assuring electric conduction between an inner ring and an outer ring by filling electroconductive grease. Rotation of a photoreceptor drum is borne by using a electroconductive rolling bearing having a resistance between the inner ring and the outer ring of about 15 kOMEGA or less in terms of a maximum value and about 8 kOMEGA or less in terms of an effective value under a dynamic condition, where a radial or thrust load acting between the inner ring and the outer ring is 10 N, and a relative difference in rotational velocity between the inner ring and the outer ring is 150 rpm, and the photoreceptor drum is rotated at about 75 rpm or more.
|
