G - Physics – 01 – K
Patent
G - Physics
01
K
116/67
G01K 1/02 (2006.01) G01K 11/06 (2006.01)
Patent
CA 1095340
Abstract A freeze and thaw indicator is provided utilizing the expansion characteristics of water when it undergoes a change from the liquid state to the solid state. An ampul having one side made weaker than its opposite side is substantially filled with water. Indicator paper having ink printed on one side is situated adjacent to the ampul. The indicator paper and ampul are housed in a blister pack plastic container for protecting the ampul from breakage. When the temperature around the indicator reaches the freezing point of water, the ampul breaks. During a subsequent thawing, the water flows on to the indicator paper causing the ink which is printed on one side to wick up, thereby indicating that the freeze or thaw has taken place. - 1 -
278866
Couch Thomas W.
Fournier Erick-Pierre
Harvey James A.
Huibers Derk T.a.
Mercer Howard A.
Akzona Incorporated
Swabey Ogilvy Renault
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