Glass manufacturing – Processes – Glass preform treating
65351, 65104, C03B 2700
A continuous operation for heating, bending and tempering glass sheets is converted to tempering flat glass sheets by employing a heat-reflecting shield over the glass path in the unused bending zone. In the quenching zone, quenching medium is directed against the underside of the glass sheets with greater force than is customary, and driven hold-down rolls are employed above the glass path in the quench zone in order to maintain movement of the glass sheets through the quenching zone.
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Mechling Charles H.
Niedermier James B.
Steber Norman J.
Kellogg Arthur D.
Millman Dennis G.
PPG Industries Inc.
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