| 摘要 |
<P>PROBLEM TO BE SOLVED: To effectively eliminate an image quality defect of afterimage associated with the phenomenon of transition of an external additive to an image carrier due to continuous production of frame images. <P>SOLUTION: An image forming apparatus comprises, as external-additive temporary collection means 10: a charged collection member 11 whose facing part facing at least the image carrier 1 is composed of a material whose triboelectric series is positioned at a positive side than those of an external additive W and an image carrier 1; a contact part 12 that is provided so as to contact a portion of the charged collection member 11 and a surface of the image carrier 1 and that triboelectrically charges the charged collection member 11 due to contact with the image carrier 1 when the image carrier 1 rotates; and a gap part 13 that has a portion changing so as to gradually become larger as a gap between the facing part of the charged collection member 11 and the image carrier 1 separates from the contact part 12 and that causes an electric field E<SB POS="POST">1</SB>, based on electric charges generated by triboelectric charging when the charged collection member 11 is triboelectrically charged by the contact part 12, to affect the external additive W on the image carrier 1 to be electrostatically attracted. <P>COPYRIGHT: (C)2013,JPO&INPIT |
