Product thaw indicator

Details Product thaw indicator Product thaw indicator

G - Physics

01

K

116/67

G01K 11/06 (2006.01)

Patent

CA 1055321

PRODUCT THAW INDICATOR ROBERT HILL INVENTOR ABSTRACT OF THE DISCLOSURE A device is described for indicating the thermal history of a product, i.e., whether or not such product has thawed and then been refrozen. The device includes a housing which is secureable in good thermal contact to the exterior of a package containing a frozen product. The walls of such housing insulate the same from the environment surrounding the package, while at the same time assuring good thermal contact between such interior and the product within the package. A closed membrane is positioned within the housing for containing a diffusion agent, and a wickable material extends from such membrane to a plurality of transparent windows in the wall of the housing. A dam extends across the wick- able material to separate the closed membrane from such windows in a manner controlling diffusion of the diffusion agent through the wickable material.

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