Thaw indicator

Signals and indicators – Alarms – Fluid flow

Patent

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Details

73356, 73358, 116114Y, 116114AB, 426 88, G01K 1108

Patent

active

040221490

ABSTRACT:
The thaw indicator is formed from a frangible capsule made of edible wax. A mixture of edible gelatin and colored water is sealed inside the capsule. The wax capsule is surrounded by a non-toxic blotter-like absorbant material which is coextensive with and in contact with the outer surface of the capsule. A time-delay for the thaw indicator is provided by adjusting the concentration of the gelatin and water mixture.

REFERENCES:
patent: 2277278 (1942-03-01), Triplett
patent: 2460215 (1949-01-01), Chase
patent: 2753270 (1956-07-01), Direnzo
patent: 2755665 (1956-07-01), Muncheryan
patent: 2823131 (1958-02-01), Power
patent: 2850393 (1958-09-01), Romito
patent: 2951764 (1960-09-01), Chase
patent: 3177843 (1965-04-01), Geocaris
patent: 3437070 (1969-04-01), Campbell
patent: 3702077 (1972-11-01), Szabo
patent: 3786777 (1974-01-01), Smith
Food Industries; Ramstad et al., Dec. 1950, pp. 84, 184, 182.

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