APPARATUS AND METHOD FOR TEMPERING GLASS USING ELECTROMAGNETIC RADIATION
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United States of America Patent
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Nov 25, 2015
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Dec 5, 2014
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Abstract
A method of thermally tempering a glass sheet. The method includes preheating the glass sheet to a temperature higher than a strain point of the glass sheet and lower than a softening point of the glass sheet, exposing the glass sheet to an electromagnetic radiation in order to heat the mid-plane of the glass sheet to a temperature significantly higher than the transition point while simultaneously keeping a surface of the glass sheet at a temperature that is below the softening point, and quenching the glass sheet so that the temperature of the mid-plane and the surface of the glass sheet fall below the strain point, respectively.
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