Method for cutting a continuous glass sheet during the production of flat glass
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United States of America Patent
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Apr 30, 2013
Grant Date -
May 3, 2012
app pub date -
Dec 22, 2011
filing date -
Aug 16, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
In the method for cutting a continuously moving glass sheet with an inhomogeneous thickness distribution across the glass sheet, a cutting tool is moved across it at an angle to its travel direction to form a fissure and then the glass sheet is broken along the fissure. To avoid premature breakage in thin regions the applied cutting force is controlled by a controller based on control commands so that the cutting force is decreased when the glass sheet thickness decreases and is increased when it increases. In a preferred embodiment cutting force switchover points are based on an initial measurement of the thickness distribution. In another embodiment the thickness is continuously measured and the applied cutting force is automatically adjusted accordingly, so that the cutting force is greater when the thickness is greater, and vice versa.
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