Method for heating moving glass sheets

Details Method for heating moving glass sheets Method for heating moving glass sheets

1993-06-28

2000-07-25

Griffin, Steven P.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65111, C03B 23023, C03B 2908

Patent

active

060923938

ABSTRACT:
A furnace for heating glass sheets moving along the axis of the furnace has at least one differentiated heating cell, the heating elements of which disposed at the vault side are constituted of sets of electrical resistors controlled in temperature or in power independently for each set. A portion of the electrical resistors are mounted parallel to the axis of the furnace, the other heating cells each constituting a longitudinal heating zone independent of the other longitudinal zones and having, at the vault side, heating elements composed of sets of electrical resistors subdivided into several independent transverse sub-zones, in which the electrical resistors are mounted perpendicularly to the axis of the furnace. The invention is applicable to the manufacture of curved and toughened panes.

REFERENCES:
patent: 4601743 (1986-07-01), Canfield
patent: 4824464 (1989-04-01), Perin et al.
patent: 4952227 (1990-08-01), Herrington et al.
patent: 5173102 (1992-12-01), Weber et al.
patent: 5470367 (1995-11-01), Salonen et al.

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