CONVECTIVE METHOD OF HEATING GLASS SHEETS USING COMPRESSED AIR IN CONJUNCTION WITH HEATED OVEN AIR

摘要

A semi-convective forced air system for heating glass sheets, comprises a heating chamber in an oven, a longitudinal conveyor extending through the heating chamber, a compressed air source, a plurality oflongitudinally-extending compressed air pipes within the chamber, each of said pipes in fluid connection with the compressed air source, each of the pipes oriented parallel to the length of the longitudinal conveyor, the pipes having a series of spaced apart nozzles mounted thereon, a distribution pipe in fluid connection with the air source and the pipes, each of the nozzles having an upper port for receiving heated oven air, a side wall hole for receiving compressed air, a mixing chamber for mixing the compressed air with the oven air to form a hot mix, and a lower port for discharging the mix onto sheets in the oven chamber.