Electrophotography – Internal machine environment – Particle or contaminant control
Reexamination Certificate
2008-04-29
2008-04-29
Brase, Sandra L. (Department: 2852)
Electrophotography
Internal machine environment
Particle or contaminant control
C399S066000
Reexamination Certificate
active
07366438
ABSTRACT:
An image forming apparatus includes an image bearing member; a toner image forming section for forming toner images on the image bearing member, whereby the toner image forming section forms a detection patch on the image bearing member; a transfer member for contacting the image bearing member to form a transfer nip portion, and electrically transferring the toner image to the recording material in the transfer nip portion; a detector for detecting the detection patch; a controller for variably controlling a toner image forming condition based on the detection result of the detector; and a toner removing section for forming a cleaning electric field to remove toner adhering to the transfer member when the inter-toner image area passes through the transfer nip portion. The electric field electrostatically moves the toner adhering to the transfer member to the image bearing member. A length of time of the electric field formed after the detection patch has passed through the transfer nip portion in a time period when the inter-toner image area on which the detection patch is formed passes through the transfer nip portion, is longer than a length of time of the electric field formed in a time period when the inter-toner image area on which the detection patch is not formed passes through the transfer nip portion.
REFERENCES:
patent: 5337127 (1994-08-01), Imaue
patent: 5621509 (1997-04-01), Karashima et al.
patent: 5729788 (1998-03-01), Hirohashi et al.
patent: 5822649 (1998-10-01), Karashima et al.
patent: 5890030 (1999-03-01), Namekata et al.
patent: 6173135 (2001-01-01), Yuminamochi et al.
patent: 6341205 (2002-01-01), Yoshino et al.
patent: 7242887 (2007-07-01), Takeuchi et al.
patent: 2006/0104653 (2006-05-01), Yamamoto et al.
patent: 4-120560 (1992-04-01), None
patent: 8-314297 (1996-11-01), None
patent: 2000-147914 (2000-05-01), None
patent: 2002-55543 (2002-02-01), None
patent: 2003-84582 (2003-03-01), None
patent: 2003-248361 (2003-09-01), None
patent: 2003-302798 (2003-10-01), None
Patent Abstracts of Japan, Publication No. 04120560, Apr. 21, 1992.
Patent Abstracts of Japan, Publication No. 2003248361, Sep. 5, 2003.
Ikeda Yuichi
Takeuchi Yasushi
Tomine Jun
Brase Sandra L.
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
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