Glass manufacturing – Processes – Glass preform treating
Patent
1998-07-31
1999-08-17
Griffin, Steven P.
Glass manufacturing
Processes
Glass preform treating
65115, 65119, 65348, C03B 2702, C03B 2704
Patent
active
059388080
ABSTRACT:
A process for quenching a heated glass sheet is performed by apparatus (26) that includes a pair of quench units (28) between which the glass sheet is located with each quench unit having nozzles (34) for directing cryogenic flows (36) including a liquid (42) toward the oppositely facing surfaces (38) of the glass sheet so that the liquid completely vaporizes before penetrating the gas boundary layer (40) on each surface of the glass sheet. The cryogenic flows (36) can be initially completely liquid (42) or can be a two phase as the liquid (42) and a gas (44) with the latter preferably being done by spraying the two phase cryogenic flows as liquid droplets and the gas.
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Introduction to Ceramics by Kingery et al., pp. 830-831, 1976.
Kormanyos Kenneth R.
McMaster Ronald A.
Glasstech, Inc.
Griffin Steven P.
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