Image forming apparatus and electric-power control method

Details Image forming apparatus and electric-power control method Image forming apparatus and electric-power control method

2004-06-29

2009-11-17

Hoang, Tu B (Department: 3742)

Electric heating

Heating devices

With power supply and voltage or current regulation or...

C219S216000, C219S497000, C399S069000

Reexamination Certificate

active

07619185

ABSTRACT:
An electric power supply is controlled below a maximum suppliable current value by detecting the applied current of a heater. The image forming apparatus includes a heater which includes heating elements that generate heat when electric power is supplied, a current detector for detecting a current value supplied to the heater, a temperature detector for detecting the temperature of the fixing device, and an electric power controller for supplying electric power to the heater with a current application duty based on the temperature detected by the temperature detector within a range below a maximum current application duty. The maximum current application duty can be reset based on a current application duty to the heater and based on a current value detected by the current detector.

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Official Letter/Search Report issued by the Japanese Patent Office, on Oct. 17, 2008, in Japanese Application No. 2003-188738, with translation.

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