Apparatus and method for locally heating conveyed glass sheets

Details Apparatus and method for locally heating conveyed glass sheets Apparatus and method for locally heating conveyed glass sheets

C - Chemistry, Metallurgy

03

B

49/7

C03B 29/04 (2006.01) C03B 23/025 (2006.01) C03B 29/08 (2006.01)

Patent

CA 1218235

P-370 APPARATUS AND METHOD FOR LOCALLY HEATING CONVEYED GLASS SHEETS ABSTRACT An improved apparatus including a local- ized heater that moves along the direction of con- veyance with conveyed glass sheets to provide localized heating of a portion of each glass sheet to be bent without heating the rest of the glass sheet prior to its subsequent treatment. This in- vention is especially suitable for locally heat- ing designated portions of glass sheets as they are heated while being conveyed through a furnace on a horizontal roller conveyor where the desig- nated portion of glass sheets are to be formed with bends having relatively short radii of cur- vature at a bending station. The apparatus inclu- des a pair of elongated localized gas heaters, each of which is positioned above the portion of the glass sheet which requires significant bending. These heaters are mounted on a carriage driven by a drive mechanism. The drive mechanism causes the carriage to move along a path parallel to the path of glass sheet conveyance to allow the heaters to continuously heat the designated portions of the glass sheet between an upstream position and a downstream position of the carriage. After the carriage reaches its downstream position, the drive mechanism causes the carriage to return to its up- stream position in preparation for another cycle.

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