The flatness of a glass sheet is improved by feeding he sheet at a viscosity of (formula) pose through a pair of smooth flattening rollers maintained at a uniform temperature from 400-650C. The rollers are separated from each other by a distance of 75-95% of the initial thickness of the sheet.
Origin
Unknown
Journal Title
(B.P. 1241627, 4,8,71)
Sector
Primary Papers
Class
PP 327