METHOD FOR MANUFACTURING GLASS PLATE
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United States of America Patent
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Issued Date -
May 24, 2012
app pub date -
Sep 29, 2011
filing date -
Sep 30, 2010
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Abstract
A method for manufacturing a glass plate includes preparing an accommodating part made of platinum or a platinum alloy, fining molten glass of a melted feedstock, stirring and homogenizing the molten glass, and supplying the molten glass to a forming apparatus. The fining the molten glass includes causing gas bubbles to float up and out from the molten glass, and causing absorption of the gas component in the molten glass and eliminating gas bubbles. The water vapor partial pressure of an atmosphere in the causing the gas bubbles is lower than the water vapor partial pressure in at least a portion of the causing the absorption of the gas component. A boundary between the causing the gas bubbles and the causing the absorption of the gas component is a temperature lower than the maximum temperature by 30° C. or more after the molten glass has reached the maximum temperature.
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