Indicators
AssigneeEastman Kodak Company
InventorsChristopher L. Bower, Christopher B. Rider
Life of this patent
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Abstract
An indicator device includes a surface provided with at least one channel or at least one through-hole with at least two openings, wherein flowable material in an immobile state is provided adjacent to the channel or adjacent to a first opening of the through-hole, such that after application of a stimulus the material is directed along the channel by the action of capillary forces or into the at least one through-hole by the action of capillary forces and emerges at a second opening, thereby providing an indication of the application of the stimulus.
Claims11
A temperature indicator device created on a surface, comprising:
- the surface being provided with at least one through-hole with at least two openings, wherein material in an immobile state is provided adjacent to a first opening of the through-hole, such that after application of a heat stimulus above a critical temperature the material changes state and becomes flowable and is directed into the first opening of the at least one through-hole by the action of capillary forces and emerges at the second opening, thereby providing an indication that the critical temperature has been exceeded, wherein the surface is further provided with at least one channel wherein the second opening of the at least one through-hole is located in the surface adjacent to the at least one channel, such that after application of a heat stimulus the material flows along said channel.
Dependencies are inferred from the claim text.