G - Physics
01
K
G01K 3/04 (2006.01) G01K 11/06 (2006.01)
Patent
CA 2099272
A marking element for indicating whether a pre-defined temperature condition has been maintained. The marking element (1) comprises a first material (8) capable of flowing above a pre-determined temperature separated from a second absorbent ma- terial (b) by a barrier layer (7). The first and second materials are such that when the barrier layer (7) is punctured and the prede- termined temperature is exceeded the first material (8) flows along the second material (6) to produce a detectable change.
Carnie John
Colley Terence
Minter Stephen
Food Guardian Limited
Marks & Clerk
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