Spencer & Frank
Apparatus for manufacturing glass
 In order to conserve fuel in an apparatus for manufacturing glass, a continuous glass-melting tank furnace is provided with a melting compartment, a refining compartment, and a shadow arch between the compartments. The shadow arch is constituted by a cover which extends from a shadow wall at the downstream end of the melting compartment to an end wall at the upstream end of the refining compartment. The melting and refining compartments communicate via a passage beneath the shadow wall at the downstream end of the melting compartment, and a sill is positioned between this shadow wall and the refining compartment. The top of this sill is at least as high as the top of the passage. 
Asahi Glass Co., Ltd.
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Y02P C03B C03B C03B C03B C03B
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Motoharu
Kurata