Image fixing device with phase controlled heaters

Details Image fixing device with phase controlled heaters Image fixing device with phase controlled heaters

2006-08-08

2006-08-08

Chen, Sophia S. (Department: 2852)

Electrophotography

Control of electrophotography process

Control of fixing

C219S216000, C399S088000

Reexamination Certificate

active

07088937

ABSTRACT:
An image fixing apparatus has a first rotatable member heated by a first heater and a first temperature detecting element for detecting its temperature; a first controller for controlling electric supply to the first heater to maintain a detected temperature of the first temperature detecting element at a first target temperature; a second rotatable member heated by a second heater and forming a fixing nip with the first rotatable member; a second temperature detecting element for detecting a temperature of the second rotatable member; a second controller for controlling electric supply to the second heater to maintain the detected temperature of the second temperature detecting element at a second target temperature; and a phase controller for controlling electric energy supply phase so as to avoid overlapping of a phase of an electric power supply to the first heater and a phase of an electric power supply to the second heater.

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