Image forming apparatus with residual toner transfer feature

Details Image forming apparatus with residual toner transfer feature Image forming apparatus with residual toner transfer feature

2007-06-05

2010-11-09

Gray, David M (Department: 2852)

Electrophotography

Supplemental electrophotographic process

Exposure or charging

C399S149000, C399S044000

Reexamination Certificate

active

07831176

ABSTRACT:
An image forming apparatus is constituted by a rotatable image bearing member; a charging member for electrically charging the image bearing member in contact with the image bearing member; developing member, containing polishing particles, for collecting toner from the image bearing member and effecting development on the basis of an electrostatic latent image formed on the image bearing member; a transfer member for transferring a toner image formed on the image bearing member onto a transfer material; an auxiliary charging member, located downstream from a transfer portion and upstream from the charging member with respect to a movement direction of the image bearing member, for electrically charging toner remaining on the image bearing member after the transfer by contact with the image bearing member; and control means for performing a discharging mode, for discharging polishing particles from the auxiliary charging member onto the image bearing member on the basis of an image ratio of an image to be formed, during non-image formation by applying a voltage to the auxiliary charging member under a condition different from a condition for applying a voltage to the auxiliary charging member during image formation.

REFERENCES:
patent: 6421512 (2002-07-01), Watanabe et al.
patent: 6744994 (2004-06-01), Yoshikawa et al.
patent: 6952546 (2005-10-01), Yoshikawa
patent: 2005/0169668 (2005-08-01), Koichi et al.
patent: 2000-47545 (2000-02-01), None
patent: 2000-81738 (2000-03-01), None
patent: 2001-215798 (2001-08-01), None
patent: 2001-215799 (2001-08-01), None
patent: 2004-117960 (2004-04-01), None

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