PROCESS FOR OBTAINING DIFFERENTLY HARDENDED AREAS OF GLASS PANES, ESPECIALLY OF WIND SCREENS OF MOTOR VEHICLES

摘要

The invention relates to a method of differentiated rate of hardening of a glass sheet by blowing a cooling gas in the direction of this sheet having two zones from nozzles. According to the invention, a simultaneous solidification of the glass sheet is produced at both zones of the sheet in spite of the differentiated treatments applied to establish a difference of hardening between the different zones of the sheet. Application is to the production of flat glass sheets.