Corning Incorporated
Continuous methods of making glass ribbon and as-drawn glass articles from the same

Abstract:

A method for making a glass ribbon that includes: flowing a glass into a caster having a width (W.sub.cast) from about 100 mm to about 5 m and a thickness (t) from about 1 mm to about 500 mm to form an a cast glass; cooling the cast glass in the caster to a viscosity of at least 10.sup.8 Poise; conveying the cast glass from the caster; drawing the cast glass, the drawing comprising heating the cast glass to an average viscosity of less than 10.sup.7 Poise and drawing the cast glass into a glass ribbon having a width (W.sub.ribbon) that is less than W.sub.cast; and thereafter cooling the glass ribbon to ambient temperature. Further, the cast glass during the cooling, conveying and drawing steps is about 50.degree. C. or higher.