Apparatus and method for severing a glass sheet
AssigneeCorning Incorporated
InventorsSteven Edward DeMartino, David Alan Deneka, Aniello M. Palumbo
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Abstract
A method for severing a glass sheet includes preferentially heating a region of the glass sheet to form a softened region. A slit is formed in the softened region of the glass sheet to form a slit region. The slit extends at least partially into a thickness of the glass sheet. Heat is preferentially applied to the slit region of the glass sheet.
Claims14
A method for severing a strengthened glass sheet comprising a glass core layer disposed between a first glass cladding layer and a second glass cladding layer, each of the first glass cladding layer and the second glass cladding layer comprising a lower coefficient of thermal expansion than the glass core layer such that the glass core layer comprises a tensile stress, the method comprising:
- preferentially heating a region of the glass sheet to at least a softening temperature of the glass sheet to form a softened region, wherein a remote region of the glass sheet disposed away from the region remains below an annealing temperature of the glass sheet during the preferentially heating;
- forming a slit in the softened region of the glass sheet to form a slit region, the slit extending at least partially into a thickness of the glass sheet;
- and
- preferentially applying heat to the slit region of the glass sheet.
Dependencies are inferred from the claim text.