Measuring glass surface temperature during annealing

Details Measuring glass surface temperature during annealing Measuring glass surface temperature during annealing

1977-01-05

1978-09-19

Gorenstein, Charles

Measuring and testing

Gas analysis

Moisture content or vapor pressure

136233, G01K 702

Patent

active

041144449

ABSTRACT:
Method and apparatus for continuously monitoring the surface temperature of a glass ribbon moving through a critical portion of an annealing lehr where the rate of cooling determines whether the ribbon may be cut easily after annealing and whether the ribbon is subjected to spontaneous breakage during annealing. The temperature sensing means comprises a thermocouple junction embedded within a boron nitride plug a predetermined distance from the surface of the plug that slides in contact with a surface of the moving glass ribbon in the main portion of the ribbon that is cut into blanks of commercially acceptable glass of acceptable optical quality.

REFERENCES:
patent: 3006978 (1961-10-01), McGrath et al.
patent: 3241370 (1966-03-01), Mertler et al.
patent: 3305405 (1967-02-01), Jamieson
patent: 3398580 (1968-08-01), Nyman et al.
patent: 3875799 (1975-04-01), Webster
patent: 3957475 (1976-05-01), Schwenninger et al.
Niedenzu, V. and J. W. Dawson; Boron-Nitrogen Compounds; New York; Academic Press, Inc.; 1965, pp. 152-153.

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