Process And Apparatus For The Production Of Flat Glass

During the production of flat glass by vertical drawing, the bath of glass situated in the end part of the drawing kiln is subjected to a supplementary heating which extends the full width of the kiln, and is localised in such a way as to produce in the upper portion of this end part a vertical thin zone of hotter glass with lower viscosity, constituting a certain separating a further glass current from a return current.