Method for heating moving glass sheets
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United States of America Patent
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-
Jul 25, 2000
Issued Date -
N/A
app pub date -
Jun 28, 1993
filing date -
Feb 21, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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