HAIR STYLING IRON
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United States of America Patent
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app pub date -
Dec 19, 2013
filing date -
Sep 30, 2013
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Abstract
A hair styling appliance has a temperature regulation controller to mitigate heat damage to the hair. The appliance includes a pair of heated jaws that can be closed to grip the hair. A power control circuit responds to an activation sensor that senses when the jaws are closed, and a temperature sensor that senses the temperature of a heating element on the jaws. The power control circuit, in response to an activation sensor output, starts monitoring the rate of change of the heating element temperature, and, in response to a rate of decrease above a predetermined level, operates the heating element at a power level lower than a steady state power level.
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