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Cylinder blown sheet is a type of hand-blown window glass. It is created with a similar process to broad sheet, but with the use of larger cylinders. In this manufacturing process glass is blown into a cylindrical shape by a glass blower. The ends of the cylinder are cut off and a cut is made down the side of the cylinder.
Float glass is a sheet of glass made by floating molten glass on a bed of molten metal of a low melting point, typically tin, [1] although lead was used for the process in the past. [2] This method gives the sheet uniform thickness and a very flat surface. [ 3 ]
Broadly, modern glass container factories are three-part operations: the "batch house", the "hot end", and the "cold end". The batch house handles the raw materials; the hot end handles the manufacture proper—the forehearth, forming machines, and annealing ovens; and the cold end handles the product-inspection and packaging equipment.
Inspector at the cool end of a lehr. In the manufacture of float glass, a lehr oven is a long kiln with an end-to-end temperature gradient, which is used for annealing newly made glass objects that are transported through the temperature gradient either on rollers or on a conveyor belt.
Glassblower creating a hollow cylinder as the first step for window glass. Glassmakers use the term "batch" for the sum of all the raw ingredients needed to make a particular glass product. [1] To make glass, the glassmaker starts with the batch, melts it together, forms the glass product, and gradually cools it.
The machine withdrew the molten glass and blew a cylinder as the first step in Cylinder method for making window glass—replacing the task of highly skilled and highly-paid glassblowers. [60] An application for a patent on the Lubbers machine was filed during 1900, and a patent for "Apparatus for Drawing Glass" was issued in 1902. [ 61 ]
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