Glass manufacturing – Processes – Fining or homogenizing molten glass
Reexamination Certificate
2008-05-27
2008-05-27
Hug, Eric (Department: 1791)
Glass manufacturing
Processes
Fining or homogenizing molten glass
C065S134100, C065S134900, C065S374120, C065S346000, C065S347000
Reexamination Certificate
active
07377132
ABSTRACT:
A conduit for molten glass, a molten glass degassing method and a sub-atmospheric apparatus are provided, which are able to produce homogenous and good quality glass at low cost. A conduit for molten glass, which is capable of flowing molten glass in a horizontal direction, and to which vertical pipes are connectable, is disposed in a substantially horizontal direction. The conduit for molten glass can increase the area of a free surface of the molten glass by setting a width W at a larger value than a height H in cross-section and having an outline in cross-section comprising a convex curve. When the conduit for molten glass thus configured is used as a sub-atmospheric apparatus, it is possible to degas the molten glass effectively. Additionally, it is possible to have a sufficient strength since the convex curve forming the cross-section is elliptical. Further, it is possible to reduce costs by decreasing the amount of metal required for forming the cross-section.
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Hamashima Kazuo
Hirahara Yasuharu
Ito Hajime
Asahi Glass Company Limited
Hug Eric
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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