Manufacturing glass with improved silicon carbide bushing operat

Details Manufacturing glass with improved silicon carbide bushing operat Manufacturing glass with improved silicon carbide bushing operat

1978-09-15

1980-01-29

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

13 6, 13 25, 65374R, 174126R, C03B 3702

Patent

active

041859804

ABSTRACT:
An improvement is provided in apparatus of the type which comprises a glass feeder adapted to discharge a stream of glass, the feeder including a terminal or tab on each of opposed side wall portions and means are provided, including electrical connectors respectively connected to one or the other of the terminals for passing an electrical current through the bushing so as to resistively heat it and maintain it at an elevated temperature; the improvement resides in employing a bushing essentially comprising silicon carbide and locating a graphitic material intermediate the respective terminal and connector and in this way inhibiting the formation of silica to thereby provide a bushing with a longer operating life.

REFERENCES:
patent: 2907972 (1959-10-01), Schildhauer et al.
patent: 3350182 (1967-10-01), Hunter et al.
patent: 3400253 (1968-09-01), Marker

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