Fusion processes for producing sheet glass
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United States of America Patent
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Sep 8, 2015
Grant Date -
May 26, 2011
app pub date -
Nov 19, 2010
filing date -
Nov 25, 2009
priority date (Note) -
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Abstract
Methods are provided for controlling the formation of defects in sheet glass produced by a fusion process which employs a zirconia melting unit. The methods comprise controlling the temperature profile of the glass as it passes through the finer, finer to stir chamber connecting tube, and stir chamber to minimize both the amount of zirconia which diffuses into the glass and the amount of secondary zirconia based defects which comes out of solution in the stir chamber.
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