Food thermalization device

• US 5,948,301 A
• Filed: 05/13/1998
• Issued: 09/07/1999
• Est. Priority Date: 01/31/1997
• Status: Expired due to Fees

• Current Assignee: BEL Group LLC
• Original Assignee: BEL Group LLC
• Inventors: Liebermann, Benno
• Primary Examiner(s): Walberg, Teresa
• Assistant Examiner(s): Pasrija, Krishan
• Application Number:
  US09/083,777
• Time in Patent Office: 482 Days
• Field of Search: 219/518, 219/506, 219/412, 219/413, 219/497, 219/512, 219/548, 219/490, 219/492, 219/395, 426/232, 426/233, 426/234, 426/236, 426/523, 126/21
• US Class Current: 219/395
• CPC Class Codes: A47J 36/2483 with electrical heating means
• CPC Class Codes: A47J 39/006 for either storing and preparing or for preparing food on serving trays, e.g. heating, thawing, preserving

Abstract

A food thermalization device is provided, which permits the food to be thermalized and held for extended periods of time without causing the food to deteriorate. The device includes an electrically-resistance-heated plate, which is controlled to equilibrate at a set temperature in the range of 160° F. to 185° F., with a fluctuation not exceeding plus or minus 5° F. The plate draws much less power than other food cooking devices and occupies much less space for the amount of food it can prepare. A browning oven is also provided for exposing unwrapped food to very high temperature radiation for a short period of time to brown the food.

Claims

1. A device for thermalizing food, comprising:

a heat-conducting plate defining an upper food-contact surface having a food contact surface area;

an electrical resistance heater in conductive contact with said plate, wherein the resistance of the heater is selected so that the heater draws less than 200 watts per square foot of food contact surface area; and

an automatic control, which maintains the temperature of the plate at an equilibrated, fixed temperature in the range of 160°

F. to 185°

F., with a temperature fluctuation within the range of ±

5°

F. when equilibrium has been reached.

2. A device as recited in claim 1, wherein the electrical resistance heater is embedded in the plate.

3. A device as recited in claim 1, wherein the plate is made of metal, and the resistance heater is embedded in a material which is adhered to the metal.

4. A device as recited in claim 3, wherein the plate is made of two sheets of metal, with the resistance heater sandwiched between the two sheets.

5. A device as recited in claim 3, wherein the plate is made of a ceramic material that is cast around the resistance heater.

10. A device for thermalizing food as recited in claim 1, and further comprising a base which supports said heat-conducting plate;

and a biasing spring which biases said plate upwardly.

11. A device for thermalizing food as recited in claim 1, wherein said heat-conducting plate is curved upwardly to receive a chafing dish.

6. A food thermalization rack, comprising:

a vertical rack;

a plurality of thermalization plates mounted at different heights on said rack, each of said plates including a flat, heat-conducting plate; and

an electrical resistance heater in contact with said plate;

a control system which maintains each plate at a fixed, equilibrated temperature in the range of 160°

F. to 185°

F., with a fluctuation within the range of plus or minus 5°

F. once equilibrium has been reached;

wherein the vertical spacing between two adjacent plates is less than two-and-one-half inches.

7. A food thermalization rack as recited in claim 6, wherein said control system includes a sensor, which indicates the temperature of the plate;

a timer; and

an indicator system;

wherein said control system measures the amount of time the food is exposed to the heated plate and indicates when the food has been exposed to the heated plate for sufficient time to be ready.

8. A food thermalization rack as recited in claim 7, and further comprising an alarm which operates if food is removed prior to reaching the set time.

9. A combination food thermalization rack and browning oven, comprising:

a vertical rack;

a plurality of thermalization plates mounted at different heights on said rack, each of said plates including a flat, heat-conducting plate; and

an electrical resistance heater in contact with said plate;

a control system which maintains each plate at an equilibrated fixed temperature in the range of 160°

F. to 185°

F., with a temperature fluctuation within the range of plus or minus 5°

F. once equilibrium has been reached;

wherein the vertical spacing between two adjacent plates is less than two-and-one-half inches; and

a high speed browning oven, comprising;

a housing;

a fan mounted on said housing for drawing air through said housing;

a food-supporting grid mounted in said housing;

a plurality of high temperature elements mounted in said housing above and below said grid; and

a control system which turns the elements off after a preset time.