Temperature indicators

Details Temperature indicators Temperature indicators

1973-07-31

1976-05-11

Gill, James J.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

73363, 264230, G01K 304, G01K 556, G01K 562, G01K 1108

Patent

active

039554180

ABSTRACT:
A device capable of indicating the time/temperature history of a frozen product, comprises a strained article of elastomeric material having a glass/rubber transition temperature above the storage temperature of the frozen article and having the property of relaxing over a temperature range below the glass/rubber transition temperature at a rate which is dependent on the temperature, and an indicator for indicating the amount of relaxation of the article on change of temperature through the glass/rubber transition temperature.

REFERENCES:
patent: 2647393 (1953-08-01), Stewart
patent: 3291617 (1966-12-01), Barker et al.
patent: 3369391 (1968-02-01), Warfield
patent: 3403558 (1968-10-01), Elliot
patent: 3452599 (1969-07-01), Kishel
patent: 3483748 (1969-12-01), Rogen et al.
patent: 3521477 (1970-07-01), Dollet
patent: 3597372 (1971-08-01), Cook
patent: 3691501 (1972-09-01), Katchka et al.
stille, J. K. Introduction to Polymer Chemistry, pp. 30-33, Wiley, N.Y. copyright 1962.

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