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Cost cutting was done because of necessity, as manufacturers fought to survive. In the glass industry, several trusts were formed in attempts to cut costs, control supply, and control prices. Among the trusts were the National Glass Company, United States Glass Company, and American Window Glass Company. [107]
Crown glass. Crown glass was an early type of window glass. In this process, glass was blown into a "crown" or hollow globe. This was then transferred from the blowpipe to a punty and then flattened by reheating and spinning out the bowl-shaped piece of glass (bullion) into a flat disk by centrifugal force, up to 5 or 6 feet (1.5 to 1.8 metres) in diameter.
The ideal gap size varies by location, but on average it ranges from 15-18 mm thick, giving a final assembly size of 23-26 mm assuming a typical glazing thickness of 4 mm. [9] A double-paned window with air in the gap has an R-value of 2.1, which is much better than the 0.9 that a single pane of glass yields. A triple-paned window, which is not ...
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 US in 1903.
The glass would then be cut into the desired window glass size, ... Report on the cost of production of glass in the United States. Washington. p. 430.
German workers were used, and production of window glass is believed to have begun in 1786. [108] De Neufville was a poor financial manager, and the glass works was abandoned by 1790. [109] James Caldwell and associates renovated the abandoned factory in 1792 and began producing window glass. He called his factory the Albany Glass House. [110]
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