Thermal treatment of glass

C - Chemistry – Metallurgy – 03 – B

Patent

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31/34, 49/45

C03B 27/00 (2006.01) C03B 27/052 (2006.01) C03B 27/06 (2006.01) C03B 29/02 (2006.01) F28D 19/02 (2006.01)

Patent

CA 1069700

A B S T R A C T The thermal treatment of glass is effected by heat tran- sfer between the glass and a gas-fluidised particulate material which is in a quiescent uniformly expanded state of particulate fluidisation. Class sheets are thermally toughened by immersing each glass sheet, which is at a temperature above its strain point, in the gas-fluidised bed which is in said quiescent state prior to the immersion of the glass in the bed. - 1 -

259724

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