FREMGANGSMAADE OG APPARAT TIL VAKUUMRAFFINERING AF GLAS ELLER LIGNENDE MATERIALE MED FOROEGET SKUMNING

摘要

Foaming of molten glass or the like as it enters a vacuum refining vessel is enhanced by altering the incoming stream so as to increase its surface area and/or retarding the passage of the stream through the vacuum headspace so as to increase its exposure to the vacuum.