The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 2006
Filed:
Sep. 27, 2002
Mitsuyoshi Sakai, Chiba, JP;
Michito Sasaki, Kanagawa, JP;
Hajime Itoh, Kanagawa, JP;
Rei Kitamura, Kanagawa, JP;
Atsushi Tanigaki, Kanagawa, JP;
Mitsuyoshi Sakai, Chiba, JP;
Michito Sasaki, Kanagawa, JP;
Hajime Itoh, Kanagawa, JP;
Rei Kitamura, Kanagawa, JP;
Atsushi Tanigaki, Kanagawa, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
A vacuum degassing apparatus for molten glass includes a vacuum housing which is evacuated to be depressurized therein; a vacuum degassing vessel which is provided in the vacuum housing to vacuum-degas molten glass as the molten glass flows therein; an uprising pipe which connects to the vacuum degassing vessel, and sucks and draws up undegassed molten glass to introduce the undegassed molten glass into the vacuum degassing vessel; and a downfalling pipe which connects to the vacuum degassing vessel and draws down the degassed molten glass from the vacuum degassing vessel to discharge the degassed molten glass. The cross sectional area of the path at the upper end portion of the uprising pipe is larger than the cross sectional area of the path at the lower end portion of the uprising pipe.