Glass sheets and methods of shaping glass sheets
AssigneeCorning Incorporated
InventorsSiva Venkatachalam, Liming Wang
Life of this patent
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Abstract
Methods of shaping a glass sheet each include a step of removing a first portion of the glass sheet to form a first beveled surface. The methods further include the step of removing a second portion of the glass sheet to form a second beveled surface. The methods still further include the step of removing a third portion of the glass sheet comprising a remainder of an end surface of an edge portion of the glass sheet. In further examples, glass sheets are also provided with a first bevel surface intersecting a first glass-sheet surface and an apex surface, and a second bevel surface intersecting a second glass-sheet surface and the apex surface. The glass sheet exhibits a probability of failure of less than 5% at an edge stress of 135 MPa.
Claims3
A glass sheet comprising:
- a first glass-sheet surface;
- a second glass-sheet surface opposing the first glass-sheet surface with a thickness defined between the first glass-sheet surface and the second glass-sheet surface;
- and
- an edge portion including a first bevel surface intersecting the first glass-sheet surface and an apex surface, and a second bevel surface intersecting the second glass-sheet surface and the apex surface, wherein the first and second bevel surfaces are beveled with a grinding wheel,
- wherein the glass sheet exhibits a probability of failure of less than 5% at an edge stress of 135 MPa.
A glass sheet comprising:
- a first glass-sheet surface;
- a second glass-sheet surface opposing the first glass-sheet surface with a thickness defined between the first glass-sheet surface and the second glass-sheet surface;
- and
- an edge portion comprising an end surface comprising a median crack surface, wherein the first glass-sheet surface and the end surface intersect along a first edge of the edge portion, the second glass-sheet surface and the end surface intersect along a second edge of the edge portion, and the median crack surface extends from either the first or second edge of the edge portion along the end surface,
- wherein the median crack surface is removed with a grinding wheel by (I) removing a first portion of the glass sheet comprising the first edge, thereby forming a first bevel surface between the first glass-sheet surface and the end surface;
- (II) removing a second portion of the glass sheet comprising the second edge, thereby forming a second bevel surface between the second glass-sheet surface and the end surface;
- and then (III) removing a third portion of the glass sheet comprising a remainder of the end surface, thereby forming an apex surface between the first and second bevel surfaces, wherein step (I) and/or step (II) removes the median crack surface, and
- wherein the glass sheet exhibits a probability of failure of less than 5% at an edge stress of 135 MPa.
Dependencies are inferred from the claim text.