Method and apparatus for heat-strengthening glass sheets

Details Method and apparatus for heat-strengthening glass sheets Method and apparatus for heat-strengthening glass sheets

1991-06-26

1993-08-17

Woodard, Joye L.

Glass manufacturing

Processes

Glass preform treating

65118, 65161, 65162, 65349, 65351, C03B 2508, C03B 2704

Patent

active

052364887

ABSTRACT:
The invention relates to a method and apparatus for heat-strengthening glass sheets. A glass sheet heated close to a softening temperature is heat strengthened by cooling it at a certain controlled cooling rate. The cooling is effected in a space between cooling panels and the cooling panels are cooled by a gas jet which is applied to the surfaces of cooling panels facing away from the glass sheet. A cooling space temperature measurement can be used for controlling the power of a cooling jet.

REFERENCES:
patent: 1944625 (1934-01-01), Ziegler
patent: 2188401 (1940-01-01), Crowley
patent: 3304166 (1967-02-01), Bolland
patent: 4225333 (1980-09-01), Frank
patent: 4236909 (1980-12-01), Thomas et al.
patent: 4400194 (1983-08-01), Starr
patent: 4759788 (1988-07-01), Ward
patent: 4816058 (1989-03-01), Kuster et al.
patent: 4874418 (1989-10-01), Kuster et al.
patent: 5078774 (1992-01-01), Vehmas et al.

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