Power supply for a first and second heating elements in image forming apparatus with control based on detected temperature at start
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United States of America Patent
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Oct 31, 2006
Issued Date -
N/A
app pub date -
Mar 5, 2004
filing date -
Mar 6, 2003
priority date (Note) -
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status (Latency Note)
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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.
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