Process for producing a glass for cathode ray tubes

Details Process for producing a glass for cathode ray tubes Process for producing a glass for cathode ray tubes

2006-02-21

2006-02-21

Griffin, Steven P. (Department: 1731)

Glass manufacturing

Processes

Fining or homogenizing molten glass

C065S032500, C065S134900

Reexamination Certificate

active

07000432

ABSTRACT:
A process for producing a glass for cathode ray tubes, having a Sb2O3content of from 0 to 0.19% as represented by mass percentage and containing H2O, which process comprises a step of melting a raw material in an atmosphere under a pressure of P0to obtain a molten glass, and a step of vacuum degassing the molten glass in an atmosphere under a pressure PAwhich is lower than P0, wherein the pressure P of the molten glass is made to be at most (6.1 W+0.06) atm in the vacuum degassing step, wherein W is the content of said H2O as represented by mass percentage.

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