Flat glass is manufactured by the flot process on a molten metal bath, above which substantially all the protective gas atmosphere is introduced at the cool downstream end of the bath and withdrawn at the hotter upstream end of the bath. The flow of protective gas from the cooler, to the hotter end removes vaporised metal compounds which would otherwise condense and contaminate the glass surface.
Origin
Unknown
Journal Title
(U.S.P 35551 126, 29.12.70)
Sector
Primary Papers
Class
PP 275