Method for heat-treating a glass substrate

Details Method for heat-treating a glass substrate Method for heat-treating a glass substrate

1997-07-10

1999-03-16

Silverman, Stanley S.

Glass manufacturing

Processes

Glass preform treating

65117, C03B 3200

Patent

active

058823719

ABSTRACT:
In each of the second and subsequent heat treatments, in a case where a glass substrate shrinks by heat treatment at the same average cooling rate as the average cooling rate in the immediately preceding heat treatment, the average cooling rate is set to be larger than that in the immediately preceding heat treatment, and inversely, in a case where the glass substrate extends, the average cooling rate is set to be smaller than that in the immediately preceding heat treatment.

REFERENCES:
patent: 4361428 (1982-11-01), Bartusel et al.
patent: 5236488 (1993-08-01), Vehmas
patent: 5597395 (1997-01-01), Bocko et al.
patent: 5643649 (1997-07-01), Hagan et al.
patent: 5674304 (1997-10-01), Fukada et al.
patent: 5676722 (1997-10-01), Seidel et al.

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