Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1990-08-15
1993-02-23
Walberg, Teresa J.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219521, 219506, 219453, H05B 368
Patent
active
051892812
ABSTRACT:
A rethermalization cart having at each food tray positions therein a pair of electrical heater pads positioned to controllably heat separate food servings on a food tray positioned in the cart. Mounted in each pad is a hollow dowel of thermochromic material and surrounded by a heat conductive sleeve. The color of the material is readily visible from outside of the cart to indicate whether the food associated with that pad is safely heated. A light bulb is connected to the electrical heating circuit of the pad so that when the circuit is "on" the bulb is lit. When lit, the bulb shines through the hollow dowel. The cart, when in position in a refrigerator unit, is plugged into an electrical receptacle in the unit. When the cart is moved in or out of the unit to access the trays, the cart becomes unplugged. Although the light bulb is thereby extinguished, if lit, the thermochromic dowel still indicates by its color the thermal condition of the food.
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Aladdin Advanced Meal Systems Walk-In Rethermalization Refrigerator, Nov. 1989.
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Cundiff Kevin B.
Little, Jr. Kenneth R.
Wyatt W. Burk
Aladdin Synergetics, Inc.
Walberg Teresa J.
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