Patent ID: 6881931
Filing Date: 2005-04-19
Classification: C03B,Y10S

Abstract:
1. An apparatus for heating glass, which apparatus comprises a tempering furnace comprising horizontal rollers arranged to support the glass and to form its conveyor; and means for sucking air from the inside of the tempering furnace and for circulating the air to be blown back at least onto the upper surface of the glass, comprising a pressurization unit; a return pipe of the upper side; and blow pipes of the upper side, which blow pipes are arranged in the vicinity of the surface of the glass, whereby the return pipe is arranged to convey air from the tempering furnace to the pressurization unit, and the pressurization unit is arranged to pressurize the air conveyed from the tempering furnace to an overpressure of 0.1 bar relative to the pressure of the tempering furnace, whereby the pressurized air is hot and arranged to be blown through the blow pipes of the upper side substantially perpendicularly onto the upper surface of the glass.