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US 5,383,990 AGranted
Method for bending and laminating a pair of glass plates
AssigneeAsahi Glass Company, Limited
InventorHiroshi Tsuji
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Abstract
In a curved laminated glass comprising a plurality of glass plates which are bent in a substantially convex form, laminated and bonded together, an outer glass plate is softened faster than an inner glass plate when they are located in an atmosphere of high temperature which is higher than a temperature capable of bending glass.
Claims7
A method of bending glass plates for a laminated glass wherein two glass plates for a laminated glass are simultaneously bent, the method comprising:
- providing first and second glass plates which are components of the laminated glass in an overlapping state on a bending mold, said bending mold having a shaping surface of a substantially concave form, wherein the second glass plate is disposed below said first glass plate and said second glass plate has at least one of:
- (a) a heat absorptivity which is greater than a heat absorptivity of said first glass plate;
- and (b) a softening point which is lower than a softening point of said first glass plate;
- such that said second glass plate is softened faster than said first glass plate when said first and second glass plates are heated;
- heating said first and second glass plates in a heating furnace such that said first and second glass plates are bent into a shape substantially corresponding to the shaping surface of the bending mold utilizing the deadweight of the first and second glass plates;
- and
- combining said first and second plates to form a laminated glass.
4 more elements
Dependencies are inferred from the claim text.