Method of introducing protective atmosphere gases into a glass f

Details Method of introducing protective atmosphere gases into a glass f Method of introducing protective atmosphere gases into a glass f

1975-07-16

1976-07-20

Kellogg, Arthur D.

Glass manufacturing

Processes

Operating under inert or reducing conditions

65 65A, 65 99A, 65182R, C03B 1802

Patent

active

039704424

ABSTRACT:
A glass forming chamber in which glass is formed into a continuous sheet by floating it on the surface of molten metal is provided with a first protective atmosphere gas in an enclosed shell above a refractory roof in the chamber and with a second protective atmosphere gas in the headspace of the operating portion of the chamber in the vicinity of the glass being formed. The second protective atmosphere gas is more reducing than the first. For example, the first protective atmosphere gas may be nitrogen while the second protective atmosphere gas is a mixture of nitrogen and hydrogen.

REFERENCES:
patent: 3083551 (1963-04-01), Pilkington
patent: 3241938 (1966-03-01), Michalik
patent: 3356476 (1967-12-01), Gulotta
patent: 3721543 (1973-03-01), Classen et al.

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