Gas burner forced convection heating of glass sheets

Details Gas burner forced convection heating of glass sheets Gas burner forced convection heating of glass sheets

C - Chemistry, Metallurgy

03

B

49/57, 49/77

C03B 27/04 (2006.01) C03B 29/04 (2006.01) C03B 29/08 (2006.01) C03B 35/16 (2006.01)

Patent

CA 1332510

A furnace (12) including a roller convey- or (18) and gas burners (20) distinct from the conveyor for supplying forced convection that is the dominant mode of heat transfer to glass sheets during a heating process. The gas burners (20) have general utility but have particular utility when utilized in a closely spaced relationship to the roller conveyed glass sheets to provide the forced convection heating. Each burner (20) includes a combustion member (38) in which gas and air are introduced in a tangential relationship with respect to its inner surface to provide a swirling motion that mixes the gas with the air for combustion prior to discharge through outlets (46) to provide the forced convection heating. A glass sheet heated by this gas burner forced convection on the roller conveyor and subsequently cooled has reduced roll-wave distortion and reduced edge distortion as compared to radiantly heated glass sheets.

536459

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