Glass sheet tempering apparatus

Apparatus for tempering a shaped glass sheet having a generally convex major surface and a generally concave opposite major surface, comprising:

• a first array of spaced apart pipe nozzles directed toward a curved sheet receiving space and in communication with a source of pressurized tempering medium, each of the pipe nozzles in the first array terminating in a curved plane substantially parallel to the concave major surface of the glass sheet, the first array providing relatively unimpeded escape for spent tempering medium from the vicinity of the first array;
• a second array of nozzles directed toward and on the opposite side of the curved sheet receiving space from the first array and in communication with a source of pressurized tempering medium, each of the nozzles of the second array comprising orifices extending through a solid member facing the glass sheet receiving space, each of the nozzles in the second array terminating in a curved plane substantially parallel to the convex major surface of the glass sheet, the solid members of the second array providing extended surfaces among the orifices adapted to impede the escape of spent tempering medium from the vicinity of the second array relative to the escape from the first array, whereby tempering conditions on both sides of the curved sheet receiving space are substantially equalized;
• and means for conveying a heated shaped glass sheet into the sheet receiving space.