Shaped glass sheet and a process for the preparation thereof

Details Shaped glass sheet and a process for the preparation thereof Shaped glass sheet and a process for the preparation thereof

1996-07-16

1997-12-30

Loney, Donald

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

5 40, 5106, 5DIG4, C03B 2100

Patent

active

057024960

ABSTRACT:
A shaped glass sheet having a sharp bend is provided, wherein a radius of curvature of an outer circumference of the bend transverse to the bend is at most 4 times a thickness of the glass sheet and the straight sections of the shaped glass sheet are substantially flat. A process for the preparation of the shaped glass sheet comprises applying an electrically conductive material on a surface of a glass sheet to form a bend line, generating a graded temperature profile transverse the bend line, and then applying an electrical potential to the bend line. In another process, a width or thickness of a bend line is not uniform or a bend line is discontinuous in the longitudinal direction of the bend line, no particular temperature profile is required and, upon applying an electrical potential, arc discharge occurs along the bend line to melt the glass rapidly.

REFERENCES:
patent: 3762903 (1973-10-01), Hamilton et al.
patent: 3762904 (1973-10-01), Hamilton et al.

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