Heat strengthened glass

Details Heat strengthened glass Heat strengthened glass

C - Chemistry, Metallurgy

03

B

49/47

C03B 27/044 (2006.01) C03B 35/18 (2006.01)

Patent

CA 1310834

Abstract Heat Strengthened Glass A method of producing heat strengthened glass (1) in which the glass (1) is heated to a temperature above its strain point and is then cooled while horizontally supported. Discontinuous support (2) is provided for the glass (I) as it is cooled by intermittent regional contact with the lower surface of the glass (1), whereby any pattern of iridescence resulting from heat transfer between the lower glass surface and the support (2) is free of prominent continuous features. A glass treatment furnace for producing heat strengthened glass (1), has horizontal glass-supporting rollers (2) and cooling-flow supply means (5,6) in the vicinity of those rollers (Z), the bearing surface of each roller (2) comprising discontinuous bearing elements (3) which provide intermittent regional support contact with the lower surface of the glass (1).

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