G - Physics – 12 – B
Patent
G - Physics
12
B
340/154, 327/2
G12B 17/02 (2006.01) B65D 81/34 (2006.01) G01K 3/04 (2006.01) G01K 11/00 (2006.01) G01K 11/30 (2006.01) H05B 6/64 (2006.01)
Patent
CA 1289628
SYSTEMS AND METHODS FOR DETERMINING DONENESS OF MICROWAVE-HEATED BODIES For determining doneness of a body of food or other material heated in a microwave oven, a device including an indicator that changes appearance at a predetermined temperature, mounted on an outwardly- facing major surface of a thin-gauge metal element which is disposed in the oven so as to receive heat from the body. The metal element may be mounted on the lid or other wall of a container holding the body in the oven; the lid may be microwave-transmissive and may hold the metal element spaced above the body. The indicator may include a substance that melts at the predetermined temperature to reveal an underlying color or pattern on the metal element surface. In use, the device is placed in a microwave oven together with the body and is observed visually, for detection of the change of appearance, which occurs when the indicator reaches a temperature corresponding to adequate done- ness of the body.
553770
Alcan International Limited
Kirby Eades Gale Baker
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