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US 4,891,054 AGranted
Method for cutting hot glass
AssigneePPG Industries, Inc.
InventorsJack A. Bricker, Earl L. May, Donald P. Michelotti, John R. Dahlberg, James J. Oravitz, Jr., William R. Siskos
Life of this patent
Estimating the term…
Abstract
A glass sheet is cut while at a temperature at about its annealing point temperature by scoring the glass sheet along a line of cut and imparting a bending moment to the glass along the scored line to open the glass. The glass sheet remains at its elevated temperature throughout the cutting operation to reduce or eliminate additional heating required for subsequent processing.
Claims11
A method of cutting a glass sheet along a desire line of cut comprising:
- providing a portion of a glass sheet, including a desired line of cut, at a temperature at least about its annealing point temperature;
- scoring a surface of said portion of said glass sheet along said desired line of cut;
- and
- opening said score through the glass sheet thickness, while;
1 more element
Dependencies are inferred from the claim text.