Between 1953 and 1957, Sir Alastair Pilkington and Kenneth Bickerstaff of the UK's Pilkington Brothers developed the first successful commercial application for forming a continuous ribbon of glass using a molten tin bath on which the molten glass flows unhindered under the influence of gravity.[6] The success of this process lay in the careful balance of the volume of glass fed onto the bath, where it was flattened by its own weight.[7] Full scale profitable sales of float glass were first achieved in 1960.
(Score: 0) by Anonymous Coward on Saturday October 05 2019, @02:56PM
Time to update your knowledge of glass making, float glass is a fairly recent development,
https://en.wikipedia.org/wiki/Float_glass [wikipedia.org]