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US 5,622,540 AGranted
Method for breaking a glass sheet
AssigneeCorning Incorporated
InventorHarrie J. Stevens
Life of this patent
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Abstract
A glass breaking system is provided for breaking large sheets of glass into small sheets. A protective coating is applied to the glass sheet. A portion of the protective coating is then selectively removed, preferably by a laser beam, so that a portion of the surface of the coated side of the sheet is exposed. The glass sheet is then broken using laser separation techniques to break the glass sheet in the exposed area.
Claims9
A method for manufacturing flat glass sheets comprising the steps of:
- providing a flat glass sheet having two major surfaces;
- covering at least one of said major surfaces with a protective layer of organic material;
- and
- sweeping a laser over said glass sheet in a single pass to:
- selectively remove a portion of said protective layer, thereby forming, on said at least one major surface, a covered region and a non-covered region;
- and
- form a crack in the glass sheet along a desired line of separation in said non-covered region.
4 more elements
Dependencies are inferred from the claim text.