Method and apparatus for bending glass sheets

Details Method and apparatus for bending glass sheets Method and apparatus for bending glass sheets

C - Chemistry, Metallurgy

03

B

C03B 23/03 (2006.01)

Patent

CA 2104101

A method of and apparatus for establishing a predetermined thermal profile in a glass sheet immediately prior to press bending outside the heating furnance (12). The press bending members (26, 27) are provided with arrays of heating elements (70, 76) that are individually or zone regulated to assist in establishing an optimum temperature profile in the glass sheet conducive to proper bending. The temperature profile established in the heated sheet by the arrays of heating elements (70, 76) is coordinated with that established in the furnace (12) and subsequently, modified by heat dissipation as the glass sheet advances to the bending station (13) to achieve the proper bending temperature. The heating elements (70, 76), can also be utilized to create a temperature profile in a glass sheet generally higher than that originally established in the furnace (12). The sheet can be held in contact with one or both of the heated press members (26, 27) for a brief period of time after bending to slow the cooling rate of the sheet and increase the edge strength of the marginal edge area thereof.

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