Wetness indicator for absorbent pads

Details Wetness indicator for absorbent pads Wetness indicator for absorbent pads

1975-10-08

1977-05-10

Crowder, Clifford D.

Surgery

Respiratory method or device

Ozone or ion generation

116114R, A61F 1316

Patent

active

040222110

ABSTRACT:
A wetness indicator for an absorbent pad assembly in which the pads have light-transmitting backing sheets. The indicator comprises a water-dispersible or water-soluble coloring agent affixed to a carrier means adjacent the absorbent pad and of sufficient intensity to be readily visible through the backing sheet when the pad is dry but which after being wetted by aqueous body fluids becomes substantially invisible. The coloring agent may be used by itself or with a suitable binder. It may also be used alone or in combination with a permanent color pattern or design which latter remains visible after wetting.

REFERENCES:
patent: 2249867 (1941-07-01), Snelling
patent: 3675654 (1972-07-01), Baker et al.
patent: 3702610 (1972-11-01), Sheppard et al.
patent: 3759261 (1973-09-01), Wang
patent: 3844718 (1974-10-01), Cohen
patent: 3952746 (1976-04-01), Summers

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