Reservoir pad for time indicator

Details Reservoir pad for time indicator Reservoir pad for time indicator

1975-02-24

1976-06-15

Myracle, Jerry W.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

23253TP, 58 1R, 116114AM, 426 87, G04F 1300, G01K 1112

Patent

active

039629201

ABSTRACT:
Indicating device suitable for visibly measuring parameters such as time, temperature, and time-temperature relationships. The device comprises in combination a porous reservoir pad containing an indicating material, a wick material and activating means. The progress of the indicating material along the wick can be visibly observed to indicate the passage of time, exposure to a given minimum temperature, or a time-temperature relationship. The combination is adapted to conveniently regulate migration of the indicating material from the reservoir pad to the wick. A preferred method for making an indicating device is described.

REFERENCES:
patent: 3006313 (1961-10-01), Huyck et al.
patent: 3243303 (1966-03-01), Johnson
patent: 3414415 (1968-12-01), Broad, Jr.
patent: 3785930 (1974-01-01), Ellis
patent: 3802842 (1974-04-01), Lange et al.

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