Patent ID: 6776008
Filing Date: 2004-08-17
Classification: C03B,Y10S

Abstract:
A method of heating glass, wherein glass is led through a tempering furnace by means of a conveyor of rollers on which the glass is supported such that the glass is heated from above and below, whereby air is blown at least onto the upper surface of the glass to heat the glass in such a way that air is sucked from the inside of the tempering furnace, the air being pressurized outside the furnace and being recirculate back into the furnace and blown back onto the glass; the air sucked from the tempering furnace is pressurized by applying the compressor principle to an overpressure of over 0.1 bar relative to the pressure in the tempering furnace; the pressurized air is led by means of a pipe system into the vicinity of the surface of the glass located upon the rollers; and the air is blown substantially perpendicularly onto the upper surface of the glass.