Power supply for a first and second heating elements in...

Details Power supply for a first and second heating elements in... Power supply for a first and second heating elements in...

2006-10-31

2006-10-31

Grainger, Quana (Department: 2852)

Electrophotography

Control of electrophotography process

Control of fixing

Reexamination Certificate

active

07130554

ABSTRACT:
The present invention provides an image forming apparatus including, a heating member heating an image on a recording material having a first exothermic element in which the calorific value of the central portion is larger than that of the end and a second exothermic element in which the calorific value of the end is larger than that of the central portion, a temperature detecting member for detecting the temperature of the heating member, power supply controlling device for controlling the power supply to the first and second exothermic elements so that the temperature of the heating member becomes a target temperature, a first starting mode for stopping the power supply to the first exothermic element and starting temperature rise of the heating member when reaching a preset temperature to start temperature rise of the heating member up to a target temperature capable of forming an image, a second starting mode for starting temperature rise up to the target temperature by using the fist and second exothermic elements, and selecting device for selecting a starting mode in accordance with a detection temperature at start of the starting operation.

REFERENCES:
patent: 6047158 (2000-04-01), Morigami et al.
patent: 6687483 (2004-02-01), Chen et al.
patent: 6810220 (2004-10-01), Hamada et al.
patent: 6889018 (2005-05-01), Kinouchi et al.
patent: 2003/0223791 (2003-12-01), Akita et al.
patent: 61-124581 (1987-06-01), None
Translation of JP04-21887a to Soma (or Souma).

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