Method for manufacturing tempered glass sheet and apparatus for

Glass manufacturing – Processes – Reshaping or surface deformation of glass preform

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65 254, 65107, 65114, 65349, C03B 2100, C03B 2300, C03B 2500, C03B 2700, C03B 2900

Patent

active

060324899

ABSTRACT:
A gas is supplied to the surface of the glass sheet transferred between a heating furnace and a cooling apparatus for tempering the glass sheet. The gas is supplied from the upstream side with respect to the direction of transfer of the glass sheet by an air curtain device. This gas runs along the glass sheet surface (upper surface) downstream with respect to the direction of transfer to obstruct the flow of cooling gas from the cooling apparatus in the upstream direction. The gas prevents cooling air from the cooling apparatus from invading the heating furnace so that the difference of the curvature of the glass sheet on the front and rear part can be eliminated.

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International Search Report for EP 98 30 4486, Sep. 14, 1998.
International Search Report for EP 98 30 4466, Aug. 31, 1998.

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