Image forming apparatus with at least two...

Details Image forming apparatus with at least two... Image forming apparatus with at least two...

2006-03-21

2006-03-21

Jeffery, John A. (Department: 3742)

Electric heating

Heating devices

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

C219S216000, C399S330000

Reexamination Certificate

active

07015431

ABSTRACT:
In a heating apparatus in which a plurality of heating bodies are provided and a ratio of an electrical amounts supplied to the respective heating bodies can be changed, two or more phase electrical power supplying devices for supplying electrical power to the heating bodies in accordance with a phase of AC voltage are provided, and a heating ratio of the heating body is changed by thinning, at a predetermined rate, phase wave forms for supplying an electrical power to one of the heating bodies among combinations of the heating body and the phase electrical power supplying devices, thereby preventing increase in terminal noise voltage.

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