Glass is drawn vertically downwards from a feeder as thin tubing which is immediately flattened by passing through a series of specially shaped roller, each pair of roller constituting a stage in the flattening process. After the last pair of flattening rollers the two foils are operated by rollers placed suitably apart; the edges of the pair of foils can be first severed by suitable tools.
Origin
Unknown
Journal Title
A.G (U.S.P. 2,910, 805, 3.6.55)
Sector
Primary Papers
Class
PP 1110