Glass manufacturing – Molten glass dispensing means – Discharge orifice below melt level
Patent
1981-02-13
1982-09-21
Fisher, Richard V.
Glass manufacturing
Molten glass dispensing means
Discharge orifice below melt level
65356, 6537412, C03B 526
Patent
active
043505163
ABSTRACT:
An electric glass-melting furnace has a cylindrical orifice block formed of a single block of refractory metal and an orifice through which molten glass flows out of the furnace. The inner end of the block extends into the melting zone portion of the furnace, while the remainder of the block extends through the furnace lining and wall, with the extreme outer tip being flush with the outer face of a water jacket which surrounds the outer end portions of the block. The block has a reduced diameter portion adjacent the outer end of the block, so that the outer end face exposes minimal surface area to outside atmosphere. The direct contact of the cooling jacket with the outer end of the block keeps the temperature of this small mass of block low enough to avoid oxidation. No protective atmosphere is required for the exterior tip of the block.
REFERENCES:
patent: Re14745 (1919-10-01), Hubbard et al.
patent: 1603160 (1926-10-01), Soubier
patent: 1961015 (1934-05-01), Stewart
patent: 3659029 (1972-04-01), de Bussy
patent: 3912488 (1975-10-01), Sanford et al.
patent: 3983309 (1976-09-01), Faulkner et al.
Chenoweth Vaughn C.
Faulkner Duane H.
Fisher Richard V.
Guardian Industries Corporation
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