Electrically heated forehearth

Details Electrically heated forehearth Electrically heated forehearth

1985-09-17

1989-02-07

Envall, Jr., Roy N.

Industrial electric heating furnaces

Glass furnace device

373134, 65356, 65347, C03B 1818

Patent

active

048036986

ABSTRACT:
An electrically heated forehearth for use in glass production is heated by means of a plurality of radiant heating elements, each element traversing the forehearth substantially at right angles to the direction of glass flow and each element comprising heating zones at each edge portion and a central, non-heating zone. With the forehearth according to the present invention the molten glass is heated electrically at its edge, cooler, portions only. The central and therefore hotter part of the molten glass under the non-heating zone of the element is unheated.

REFERENCES:
patent: 3133803 (1964-05-01), Denman
patent: 3289139 (1966-11-01), Hyde
patent: 4494974 (1985-01-01), Vilk et al.
patent: 4622678 (1986-11-01), Scarfe

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