Method and apparatus for continuous monitoring and amplitude adjustment of adjustable length heating element
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United States of America Patent
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May 1, 2001
Grant Date -
N/A
app pub date -
Jan 4, 2000
filing date -
May 6, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for forming a heating element by corrugating a ribbon to a waveform having an amplitude based on a measured resistance per unit length of the ribbon. The amplitude of the corrugation is varied based on the measured resistance, to vary the actual path length of the heating element, shorter based on higher resistance and longer based on lower resistance. The heating element is formed to have a predetermined length dimension. The apparatus comprises a pair of intermeshed gears, with the spacing controlled in accordance with the measured resistance per unit length of the unformed ribbon.
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