Glass manufacturing – Glass conditioning channel section
Patent
1979-09-04
1981-10-13
Kellogg, Arthur D.
Glass manufacturing
Glass conditioning channel section
65337, 65136, 65356, C03B 516
Patent
active
042946034
ABSTRACT:
An electrically heated and/or gas heated forehearth channel has a heat conductive refractory roof structure with arch blocks supported from the sides of the channel on side blocks, some of which side blocks may include gas burners for achieving rapid initial heating of the glass contained in the channel. Once the glass temperature has been raised close to normal operating temperature electrodes heat the glass by Joule effect electrical resistance heating, and the gas burners are no longer required. A roof superstructure is provided of insulating brick, and defines muffled cooling passageways such that the gas or electrically heated forehearth can be effectively operated by removing heat from the top of the conductive refractory arch block roof structure. Means is provided for selectively cooling the underside of these arch blocks when the gas burners are operated, or directing the flow of cooling air through the muffled cooling passageways in the roof superstructure when electric heat is employed.
REFERENCES:
patent: 2144973 (1939-01-01), Honiss
patent: 2616380 (1952-11-01), Griffin
patent: 2649903 (1953-08-01), Russell
patent: 2735229 (1956-02-01), Honiss
Ault James R.
Winzer Frederick W.
Emhart Industries Inc.
Kellogg Arthur D.
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