C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
49/14
C03B 5/225 (2006.01)
Patent
CA 1085168
METHOD AND APPARATUS FOR THE MANUFACTURE OF GLASS ABSTRACT This invention relates to a process and an apparatus for the manufacture of fused glass, suitable for molding, wherein the total time of manufacture is reduced to about one hour. The process accelerates the homogenization and refining of glass by eliminating unfused particles and gas bubbles which are the main factors limiting the production rate of industrial glass. This is accomplished by increasing the temperature of the molten glass to produce foaming throughout its mass while maintaining its viscosity below 1,000 poises. This divisional application is specifically directed to an improvement in all apparatus for rapidly refining glass of the type having an elongated continuous channel in which a molten vitreous mass is introduced at one end thereof, flowed horizontally therethrough and subjected to an expansion of at least 50% of its initial molten volume by foaming the molten mass throughout its entire volume as the mass moves along the channel from its one end to the other end, said improvement comprising heating means disposed longitudinally along said channel and in said foaming zone below the surface of said vitreous mass for rapidly heating the flowing vitreous mass to cause its entire volume to pass totally to the foam state and expand by at least 50% of its initial volume.
317612
Macrae & Co.
Saint Gobain Industries
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