Patent ID: 6279349
Filing Date: 2001-08-28
Classification: C03B,F26B,F27B,F27D

Abstract:
A method for making a furnace for heating glass sheets, comprising:providing a glass sheet roll conveyor furnace of the electric resistance heater type having a housing including lower and upper portions for respectively supporting lower and upper electric resistance elements below and above a roll conveyor including conveyor rolls within the furnace;maintaining the roll conveyor and the lower housing portion of the furnace for supporting the lower electric resistance elements below the conveyor rolls such that electrical power supplied thereto provides heating from below of glass sheets conveyed by the conveyor rolls;removing the upper housing portion of the furnace above the roll conveyor; andinstalling another upper housing portion and a gas burner forced convection heater supported thereon to provide a dominant mode of external heat for heating the conveyed glass sheets from above.