- Machine drawn cylinder sheet
Machine drawn cylinder sheet was the first mechanical method for "drawing" window
glass. Cylinders of glass 40 feet (12 m) high are drawn vertically from a circular tank. The glass is then annealed and cut into 7 to 10 foot (2 to 3 m) cylinders. These are cut lengthways, reheated, and flattened.
This process was invented in the USA in 1903. This type of glass was manufactured in the early 20th century (it was manufactured in the UK by Pilkingtons from 1910 to 1933).
Other historical methods for making window glass included
broad sheet, blown plate, crown glass, polished plateand cylinder blown sheet. These methods of manufacture lasted at least until the end of the 19th century. The early 20th century marks the move away from hand-blown to machine manufactured glass such as rolled plate, flat drawn sheet, single and twin ground polished plateand float glass.
*cite web | title=Hand-blown glass: manufacturing process | work=London Crown Glass Company | url=http://www.londoncrownglass.co.uk/Manufacturing.html | accessdate=Dec. 30 | accessyear=2005
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