APPARATUS FOR QUENCHING FORMED GLASS SHEETS
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United States of America Patent
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app pub date -
Nov 2, 2011
filing date -
Dec 1, 2006
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Abandoned
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Abstract
Apparatus (42) for quenching a formed glass sheet with three steps of gas flow pressures in a manner that reduces cycle time without excessive temporary surface tension that can cause excessive breakage. A control (26) provides the quenching in the three step manner with initial pressures for .5 to 1.3 seconds, increased pressures of at least 25% greater than the initial pressures for .5 to 4 seconds, and final quenching with decreased cooling power that is less than the cooling power of the initial pressures.
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