Glass manufacturing – Processes – Glass preform treating
Patent
1988-11-21
1990-08-07
Woodard, Joye L.
Glass manufacturing
Processes
Glass preform treating
65115, 65161, 65163, 65348, C03B 2704
Patent
active
049464914
ABSTRACT:
An improved glass tempering apparatus and method is disclosed. A glass sheet is quenched by heating the glass sheet and horizontally transferring the sheet on a roller conveyor into a quenching station having an upper and lower array of nozzles for directing coolant on opposite sides of the glass. A first array of points on the glass sheet are cooled, then the glass is horizontally jogged within the quenching station and a second array of points are cooled. Preferably, the jog distance is selected so that the first and second array of points are uniformly spaced relative to one another. An alternative embodiment of the invention cools a first array of points, horizontally jogs the glass within the quenching station and recools the same array of points with each point being cooled by a different nozzle pair so that the cooled points are uniformly sized and clearly defined with minimum irregularities resulting from roller shrouding and nozzle-to-nozzle variability.
REFERENCES:
patent: 1960222 (1934-05-01), Long
patent: 3994711 (1976-11-01), McMaster
patent: 4178414 (1979-12-01), Greenhalgh
patent: 4182619 (1980-01-01), Greenhalgh
Glasstech, Inc.
Woodard Joye L.
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