Residual life indicator

Details Residual life indicator Residual life indicator

G - Physics

01

N

G01N 31/22 (2006.01)

Patent

CA 2462911

The present invention is directed toward a residual life indicator. The residual life indicator comprises a solid, surface active, waterproof support medium (20) having a concentric pattern (30) imprinted thereon. The concentric pattern comprises a center pattern (40) and at least one outer pattern (50). An indicator dye spot (60) is disposed within the center pattern of the concentric patter. When the indicator dye is exposed to contaminants, the indicator dye spot visually moves toward the outer pattern.

L'invention concerne un indicateur de durée de vie résiduelle. Cet indicateur de durée de vie résiduelle comprend un substrat de support solide, tensio-actif, étanche, sur lequel est imprimé un motif concentrique. Ce motif concentrique comprend un motif central et au moins une motif externe. Un point de colorant indicateur est placé dans le motif central du motif concentrique. Lorsque ce colorant indicateur est exposé à des contaminants, la point de colorant indicateur migre visuellement en direction du motif externe.

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