Patent Number: 6,332,339

Title: Vacuum degassing method for molten glass flow

Abstract: When molten glass which is under an atmosphere of pressure P, is fed into a vacuum chamber capable of rendering a pressure to the molten glass to be in a range of 38 [mmHg]-(P-50) [mmHg] to perform degassing to the molten glass, a staying time of the molten glass in the vacuum chamber is in a range of 0.12-4.8 hours, whereby there is obtainable an effective degassing function to the molten glass.

Inventors: Kawaguchi; Toshiyasu (Kanagawa, JP), Obayashi; Koji (Kanagawa, JP), Okada; Misao (Kanagawa, JP), Takei; Yusuke (Tokyo, JP)

Assignee: Asahi Glass Company, Limited

International Classification: C03B 5/225 (20060101); C03B 5/00 (20060101); C03B 005/16 ()

Expiration Date: 12/25/2018