Image forming apparatus featuring first and second toner...

Electrophotography – Image formation – Treatment of developed image prior to transfer

Reexamination Certificate

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Reexamination Certificate

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07062208

ABSTRACT:
An image forming apparatus has a latent image forming portion for forming an electrostatic latent image on an image bearing member; a plurality of developing portions for developing the electrostatic latent image on the image bearing member with a developer; a primary transferring portion for transferring by sequentially superposing each developer image developed by the plurality of developing portions on an intermediate transferring member; a secondary transferring portion for collectively transferring onto a transferring material the developer images transferred by being superposed on the intermediate transferring member; and a charging portion for charging the developer images on the image bearing member; wherein the charging portion decides a charging condition in accordance with the order of transferring the developer images onto the intermediate transferring member.

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patent: 5640654 (1997-06-01), Yoshizawa
patent: 5797069 (1998-08-01), Kimura et al.
patent: 5918092 (1999-06-01), Hama
patent: 5987290 (1999-11-01), Bisaiji
patent: 6349190 (2002-02-01), Liu et al.
patent: 6484004 (2002-11-01), Schein et al.
patent: 6842600 (2005-01-01), Takayanagi
patent: 11-231597 (1999-08-01), None

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