Electrically heated forehearth and method of controlling...

Details Electrically heated forehearth and method of controlling... Electrically heated forehearth and method of controlling...

C - Chemistry, Metallurgy

03

B

307/5, 49/53

C03B 7/06 (2006.01) C03B 7/07 (2006.01)

Patent

CA 1237460

15666 ABSTRACT OF THE DISCLOSURE A conditioning section of a forehearth is disclosed with sidewall electrodes for Joule effect heating of glass positioned and connected to confine the current and Joule effect heating separately to the side portions of the molten glass flow path therein. Separate circuits, controls, tempera- ture sensors and temperature set point control means are provided for the sidewall electrodes on each side. Glass temperature across the flow path is controlled and can be adjusted by separately controlling the flow of Joule effect current along each side of the flow path through manual or automatic, thermally actuated, controls for each side.

462855

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