C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
C03B 25/08 (2006.01) C03B 27/016 (2006.01) C03B 35/18 (2006.01)
Patent
CA 2058365
(57) Abstract The invention relates to an apparatus for heat-strengthening glass sheets. In a heat-strengthening station (3) down- stream of a heating furnace the cooling rate of a glass sheet is retarded by means of plates (9, 11), which are set above and below a glass sheet and return some of the thermal radiation back to a glass sheet and slow down convection. Thus, a glass sheet can be heat-strengthened by chilling it at a certain controlled cooling rate. In order to make also the lower plate effectively return some of the termal radiation applied thereto de- spite the rolls fitted in between, the top surface of lower plate (11) is made highly reflective to thermal radiation and further corrugated in a manner that the ribs of corrugations extend between the rolls close to a glass sheet. (Fig. 2)
Peramaa Harri Ensio
Vehmas Jukka Heikki
Bereskin & Parr
Tamglass Engineering Oy
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