Method of heating and bending glass sheets

Details Method of heating and bending glass sheets Method of heating and bending glass sheets

1995-08-18

1997-10-21

Czaja, Donald E.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65102, 65106, 65111, 65118, 65271, 65273, 65274, 65275, 65287, 65289, 65290, 65291, 65305, 65307, 65361, C03B 2302

Patent

active

056791232

ABSTRACT:
When heating and bending glass sheets in a furnace, it is desirable to raise the sheets towards the furnace heat sources to increase obtainable temperature differentials and reduce heating power. Disclosed is a method of bending a glass sheet on an apparatus comprising an elongate furnace divided along its length into a plurality of heating zones, each heating zone having an upper part, the method comprising the steps of supporting the glass sheet on a bending mould; moving the glass sheet through the zones of the furnace in a plurality of intermittent steps, each step substantially corresponding in length to the distance separating corresponding points of successive heating zones; exposing the glass sheet during its passage through said heating zones to a succession of furnace heat sources contained in the upper part of each zone of said furnace; heating the glass sheet to a heat-softened condition as a result of said exposure; allowing the heat-softened glass sheet to sag into conformity with said bending mould; and raising the bending i-nould, while still supporting the glass sheet, towards the furnace heat sources in at least one of the heating zones. The bent glass sheet may be used in the manufacture of a vehicle glazing.

REFERENCES:
patent: 3001328 (1961-09-01), Berseth
patent: 4403953 (1983-09-01), Suzuki
patent: 4497645 (1985-02-01), Peltonen
patent: 4687501 (1987-08-01), Reese
patent: 4726832 (1988-02-01), Kajii et al.
patent: 4755204 (1988-07-01), Boardman et al.
patent: 4783211 (1988-11-01), Fuchigami et al.
patent: 4909822 (1990-03-01), Kitaya et al.
patent: 4966547 (1990-10-01), Okuyama et al.
patent: 5085580 (1992-02-01), Reunamaki
patent: 5173102 (1992-12-01), Weber et al.
patent: 5194083 (1993-03-01), Lehto
patent: 5340375 (1994-08-01), Anttonen
patent: 5437703 (1995-08-01), Jacques et al.
881079 Finland Sep. 1989 Abstract.

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