Image forming apparatus and abnormality determination method...

Details Image forming apparatus and abnormality determination method... Image forming apparatus and abnormality determination method...

2007-10-03

2009-12-15

Gray, David M (Department: 2852)

Electrophotography

Diagnostics

C399S050000, C399S089000, C399S176000

Reexamination Certificate

active

07634202

ABSTRACT:
An image forming apparatus includes a plurality of image forming stations. In each image forming station an electrostatic latent image carrier and a charging member are arranged to face each other with a specified gap therebetween. A charging failure caused by an abnormal discharge in the gap is detected based on a current detection result by a current sensor, and an image forming station having an abnormality is reliably specified.

REFERENCES:
patent: 5864737 (1999-01-01), Obu et al.
patent: 6560419 (2003-05-01), Sugiura
patent: 2007/0147858 (2007-06-01), Inukai
patent: 2004-085902 (2004-03-01), None

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