Glass manufacturing – Means providing special atmosphere
Reexamination Certificate
2006-03-07
2006-03-07
Griffin, Steven P. (Department: 1731)
Glass manufacturing
Means providing special atmosphere
C065S134200, C065S134900
Reexamination Certificate
active
07007514
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.
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Itoh Hajime
Kitamura Rei
Sakai Mitsuyoshi
Sasaki Michito
Tanigaki Atsushi
Asahi Glass Company Limited
Griffin Steven P.
Herring Lisa
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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