Glass manufacturing – Processes – Operating under inert or reducing conditions
Patent
1996-05-31
1999-02-09
Hoffmann, John
Glass manufacturing
Processes
Operating under inert or reducing conditions
651349, 651342, 266209, 95248, 95266, G03B 5173
Patent
active
RE0360821
ABSTRACT:
A vacuum degassing method wherein a molten substance at an elevated temperature in a storage tank is sucked to a vacuum degassing vessel through an uprising pipe connecting the storage tank and the vacuum degassing vessel by maintaining the vacuum degassing vessel at a negative pressure, the molten substance is degassed and the degassed molten substance falls to a guiding duct through a downfalling pipe connecting the vacuum degassing vessel and the guiding duct characterized by that a first flow quantity of the molten substance rising in the uprising pipe is restrained and a second flow quantity thereof falling in the downfalling pipe is controlled thereby maintaining a quantity of the molten substance in the vacuum degassing vessel at a pertinent level.
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Ishimura Kazuhiko
Nakajima Shinsuke
Okada Misao
Saito Fumiaki
Yoshikawa Masaaki
Asahi Glass Company Ltd.
Hoffmann John
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