Tempered glass having openings therethrough

Details Tempered glass having openings therethrough Tempered glass having openings therethrough

C - Chemistry, Metallurgy

03

B

49/89

C03B 27/00 (2006.01) C03B 21/00 (2006.01) C03B 33/04 (2006.01)

Patent

CA 1090579

TEMPERED GLASS HAVING OPENINGS THERETHROUGH ABSTRACT OF THE DISCLOSURE This disclosure is directed to an improvement in the method of tempering glass sheets having at least one opening therethrough so as to reduce the breakage which occurs to such glass sheets because of the stresses set up therein during the quenching portion of a glass tempering operation. The method involves cutting a relief opening in the glass sheet from the opening in the glass sheet to an edge of the glass sheet. Thereafter the tempering opera- tion is carried out on the glass sheet after the relief opening has been cut therein.

280992

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