Asahi Glass Company, Limited

Hajime Ito

Kazuo Hamashima

Chikao Tanaka

Sei Nagano

Shinji Takeshita

Fumiaki Saito

Yasuharu Hirahara

Shinji Yamamura

Hiroshi Ando

Koji Hirasawa

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.

Conduit for molten glass, molten glass degassing method and molten glass degassing apparatus

A backup structure for a pipe for feeding a molten substance of high temperature has a pipe and a thermal insulation material surrounding the pipe wherein the pipe is provided with a plurality of projections on its outer periphery at predetermined intervals, and each of the productions is held at its both sides by the thermal insulation material.

Backup structure for a pipe for feeding a molten substance of high

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Yokohama, Japan

Hajime Ito