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US 5,968,219 AGranted
Bent glass-ceramic plate and a method of making glass-ceramic bent plate
AssigneeCorning Incorporated
InventorsClaude Gille, Michele Marie-Louise Meyer, Paul Leon Netter, Sophie Peschiera, Pablo Juan Luis Vilato Gailloud
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Abstract
The invention relates to a method of making glass-ceramic plates which are bent at a radius of curvature especially suitable in the manufacture of cooking plates.
Claims12
A process for the production of glass-ceramic plate having at least one bend, the process comprising the steps of:
- a) providing a precursor of a glass-ceramic flat plate,
- b) preheating the plate to a temperature lower than the nucleation temperature of the glass-ceramic precursor,
- c) quickly heating the area of the plate to be bent until the viscosity of the glass-ceramic precursor in said area reaches a value appropriate for bending, forming at least one bend with a radius of curvature less than 5 cm, the duration of the heating being short enough so as not to cause a significant nucleation of the glass-ceramic precursor, and
- d) ceramming the bent plate.
1 more element
Dependencies are inferred from the claim text.