Image forming apparatus

Details Image forming apparatus Image forming apparatus

2011-01-25

2011-01-25

Gray, David M (Department: 2852)

Electrophotography

Control of electrophotography process

Control of transfer

C399S101000, C399S235000, C399S264000

Reexamination Certificate

active

07877032

ABSTRACT:
An image forming apparatus includes an image bearing member, a toner image forming member, an intermediary transfer member for forming a primary transfer portion, and a primary transfer member supplied with a transfer voltage. The apparatus also has a voltage source for supplying, to the primary transfer member, a transfer voltage and a voltage of a polarity opposite to the transfer voltage, an image bearing member cleaning apparatus for removing toner from the image bearing member, a secondary transferring member, and an intermediary transfer member cleaning apparatus for electrostatically removing toner from the intermediary transfer member. The apparatus further has a voltage source control apparatus for controlling the voltage source so as to apply, to the primary transfer member, a voltage having an absolute value larger than a discharge threshold and having the polarity opposite to the transfer voltage, when a non-recording toner pattern passes through the primary transfer portion.

REFERENCES:
patent: 6198491 (2001-03-01), Honda
patent: 6473574 (2002-10-01), Usui et al.
patent: 7242887 (2007-07-01), Takeuchi et al.
patent: 2005/0276620 (2005-12-01), Omata
patent: 7-295347 (1995-11-01), None
patent: 8-297420 (1996-11-01), None
patent: 2000-131957 (2000-05-01), None
patent: 2000-172027 (2000-06-01), None
patent: 2001-5237 (2001-01-01), None
patent: 2002-207403 (2002-07-01), None
patent: 2002-244512 (2002-08-01), None

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