Image forming apparatus

Details Image forming apparatus Image forming apparatus

2009-02-24

2011-12-06

Porta, David (Department: 2884)

Electrophotography

Control of electrophotography process

Having temperature or humidity detection

C399S055000, C399S094000, C399S285000

Reexamination Certificate

active

08073348

ABSTRACT:
An image forming apparatus forms images. A developer bearing body receives a first voltage and supplies developer to the electrostatic latent image formed on an image bearing body. A supplying member receives a second voltage and supplies the developer to said developer bearing body. A detector detects at least one of an environmental condition, e.g., temperature and humidity outside of an apparatus and an environmental condition e.g., temperature inside of the apparatus. A controller controls the difference between the first voltage and the second voltage in accordance the environmental conditions. The controller makes a decision to determine whether the outside temperature is not lower than a first reference, whether outside humidity is not higher than a second reference, and whether inside temperature is not lower than a third reference. If the above criteria are met, the controller decreases the absolute value of the difference.

REFERENCES:
patent: 5887220 (1999-03-01), Nagaoka
patent: 2004/0101324 (2004-05-01), Kawano
patent: 2005/0047808 (2005-03-01), Yamamura
patent: 2005/0095023 (2005-05-01), Kyung et al.
patent: 2006/0204258 (2006-09-01), Yamane
patent: 2002-108089 (2002-04-01), None

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