Electrophotography – Image formation – Transfer
Patent
1996-07-02
1997-12-09
Lee, S.
Electrophotography
Image formation
Transfer
399 66, 399302, G03G 1501
Patent
active
056970315
ABSTRACT:
An apparatus having a photosensitive body and intermediate transfer body for successively transferring color toner images formed on the photosensitive body onto the intermediate transfer body to form an overlay transfer image which is transferred in batch onto transfer paper. Passage of a mark in a portion of the intermediate transfer body is detected by a mark detector in a passage area for the mark. A primary transfer device is provided in a primary transfer section of the appartus so as to contact the photosensitive body. An electrifying device is provided at a position of upstream in a rotating direction of the photosensitive body from the primary transfer device. A control device provides control such that in a standby state prior to starting the image forming, the distance from the mark detector to the downstream mark, viewed with respect to the direction of rotation of the intermediate transfer body, is always longer than a corresponding distance of the photosensitive body from a downstream position of the electrifying device with respect to the direction of rotation of the photosensitive body to the primary transfer section.
REFERENCES:
patent: 5040028 (1991-08-01), Kamimura et al.
patent: 5499092 (1996-03-01), Sasaki
Kamiya Takuro
Namekata Shinichi
Lee S.
Ricoh & Company, Ltd.
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