Rethermalization cart assembly

• US 5,093,556 A
• Filed: 02/16/1990
• Issued: 03/03/1992
• Est. Priority Date: 02/16/1990
• Status: Expired due to Term

• Current Assignee: Dinex International Incorporated (Carlisle Cos., Inc.)
• Original Assignee: Therma-Chill Incorporated
• Inventors: Oelfke, Clifford M.
• Primary Examiner(s): Walberg, Teresa J.
• Application Number:
  US07/481,555
• Time in Patent Office: 746 Days
• Field of Search: 219/385, 219/386, 219/387, 219/521, 165/918, 165/919
• US Class Current: 219/386
• CPC Class Codes: A47B 2031/002 Catering trolleys
• CPC Class Codes: A47J 39/006 for either storing and preparing or for preparing food on serving trays, e.g. heating, thawing, preserving
• CPC Class Codes: H05B 2203/003 using serpentine layout
• CPC Class Codes: H05B 2203/028 Heaters specially adapted for trays or plates to keep food or liquids hot
• CPC Class Codes: H05B 3/26 heating conductor mounted on insulating base for transparent areas H05B3/84, H05B3/86

Abstract

An apparatus for storing, refrigerating and heating food items in serving containers including a rethermalization cart including a plurality of shelves. Each of the shelves support one of a plurality of food trays thereon. Each tray has a plurality of food compartments and openings for supporting one of the serving containers. Each serving container containing food to be heated includes a cover. Each shelf of the cart has at least three heating pads conforming to the openings of the tray when the tray is inserted in the shelf. The cart also includes a plurality of individual switches each controlling all of the heater pads of each tray shelf as a set. Each switch is provided within a channel recessed from the exterior surface of the cart. The cart may also include a hinged work station attached to the exterior surfaces thereof which is movable between a first position, wherein said station extends outwardly from the cart so that each tray can be placed thereon for food preparation, and a second position, wherein the station is closely confined to said cart.

Claims

1. An apparatus for storing, refrigerating and heating food items in serving containers comprising:

a plurality of trays, each tray having a plurality of food compartments and openings for supporting one of a plurality of serving containers containing the food items, each said serving container having food to be heated being covered;

a cart having interior and exterior surfaces including a plurality of shelves, each said shelf having means for supporting at least one of said plurality of trays thereon and having heating means capable of conforming to said openings so that said covered serving containers positioned thereon are heated before serving, said heating means being unconnected with respect to said trays such that said trays are inserted into said shelves in the same orientation;

wherein each heating means includes a plurality of heater pads each having separate heating control means, each corresponding heater pad for each shelf being connected to the same control means such that the heating requirements of each corresponding heater pad for any shelf when activated are the same, and each said heater pad having a mounting flange which mates with a box channel running the width of said cart at each said shelf to releasably secure each individual heater pad to said shelf; and

refrigeration means capable of receiving said cart therein and refrigerating the food items within the serving containers.

2. The apparatus of claim 1 wherein each heater pad is secured by fastening means which passes through the flange of the casting into said box channel.

3. The apparatus of claim 1 wherein electrical connection means connecting each said heater pad to corresponding temperature control means run inside said box channel.

4. The apparatus of claim 1 wherein said box channel includes a base member and a protective top member overlying said base member to provide a cover for said box channel.

5. The apparatus of claim 4 wherein said base member includes an upwardly extending member having a ball member at its free end which engages a slot formed between two downwardly depending flange members of said top member to securely retain said top member above said base member.

6. The apparatus of claim 4 wherein said top member includes a pair of outwardly extending flange members which rest upon a pair of side members of said base member to provide said box channel cover.

7. The apparatus of claim 4 wherein said top cover includes an upwardly extending flange member which separates each said shelf into two tray compartments and provide a forward stop for each tray.

8. An apparatus for storing, refrigerating and heating food items in serving containers comprising:

a plurality of trays, each tray having a plurality of food compartments and openings for supporting one of a plurality of serving containers containing the food items, each said serving container having food to be heated being covered;

a cart having interior and exterior surfaces and including a plurality of shelves, each said shelf having means for supporting at least one of said plurality of trays thereon and having heating means capable of conforming to said openings so that covered serving containers positioned thereon are heated before serving wherein each heating means includes a plurality of heater pads mounted to said shelf, said heating means being unconnected with respect to said trays such that said trays are inserted into said shelves in the same orientation;

refrigeration means capable of receiving said cart therein and refrigerating the food items within the serving containers; and

a main controller delivering a predetermined timed electrical voltage to each heater pad such that the temperature of each set of corresponding heater pads for each shelf when activated are the same, said main controller including a voltage transformer which accepts 208/230 VAC input and delivers the necessary output voltage and current to said heater pads.

9. The apparatus of claim 8 wherein said main controller includes a three event, 24 hour, automatic timer.

10. An apparatus for storing, refrigerating and heating food items in serving containers comprising:

a plurality of trays, each tray having a plurality of food compartments and openings for supporting one of a plurality of serving containers containing the food items, each said serving container including food to be heated being covered;

a cart having interior and exterior surfaces and including a plurality of shelves, each said shelf having means for supporting at least one of said plurality of trays thereon and having heating means capable of conforming to said openings so that said covered serving containers positioned thereof are heated before serving, each heating means including a plurality of heater pads;

each said heater pad having mounting means which mates with a box channel running generally the width of said cart at each said shelf to releasably secure each individual heater pad to said shelf and wherein electrical connection means connecting each said heater pad to corresponding temperature control means runs inside said box channel; and

refrigeration means capable of receiving said cart therein and refrigerating the food items within the serving containers.

11. The apparatus of claim 10 wherein each heater pad is secured by fastening means which passes through the flange of the casting into said box channel.

12. An apparatus of claim 10 wherein said box channel includes a base member and a protective top member overlying said base member to provide a cover for said box channel.

13. An apparatus of claim 12 wherein said base member includes an upwardly extending member having a ball member at its free end which engages a slot formed between two downwardly depending flange members of said top member to securely retain said top member above said base member.

14. An apparatus of claim 12 wherein said top member includes a pair of outwardly extending flange members which rests upon a pair of side members of said base member to provide said box channel cover.

15. An apparatus of claim 12 wherein said top cover includes an upwardly extending flange member which separates each said shelf into two tray compartments and provides a forward stop for each tray.

16. An apparatus for storing, refrigerating and heating food items in serving containers comprising:

a plurality of trays, each tray having a plurality of food compartments and openings for supporting one of a plurality of serving containers containing the food items, each said serving container having food to be heated being covered;

a cart having interior and exterior surfaces and including a plurality of shelves, each said shelf having means for supporting at least one of said plurality of trays thereon and having heating means capable of conforming to said openings so that said covered serving containers positioned thereon are heated before serving;

refrigeration means capable of receiving said cart therein and refrigerating the food items within the serving containers; and

wherein each heating means includes a plurality of heater pads each having separate heating control means, each corresponding heater pad for each shelf being connected to the same control means such that the heating requirements of each corresponding heater pad for any shelf when activated are the same and wherein each said heater pad has a mounting flange which mates with a box channel running the width of said cart at each said shelf to releasably secure each individual heater pad to said shelf.

17. An apparatus for storing, refrigerating and heating food items in serving containers comprising:

a plurality of trays, each tray having a plurality of food compartments and openings for supporting one of a plurality of serving containers containing the food items, each said serving container having food to be heated being covered;

a cart having interior and exterior surfaces and including a plurality of shelves, each said shelf having means for supporting at least one of said plurality of trays thereon and having heating means capable of conforming to said openings so that covered serving containers positioned thereon are heated before serving wherein each heating means includes a plurality of heater pads mounted to said shelf;

refrigeration means capable of receiving said cart therein and refrigerating the food items within the serving containers; and

a main controller delivering a predetermined electrical current to each heater pad such that the temperature of each set of corresponding heater pads for each shelf when activated are the same, wherein said main controller includes a voltage transformer which accepts 208/230 VAC input and delivers the necessary output voltage and current to said heater pads.

18. An apparatus for storing, refrigerating and heating food items in serving containers comprising:

a plurality of trays, each tray having a plurality of food compartments and openings for supporting one of a plurality of serving containers containing the food items, each said serving container having food to be heated having a cover;

a cart having interior and exterior surfaces and including a plurality of shelves, each said shelf having means for supporting at least one of said plurality of trays thereon and having heating means capable of conforming to said openings so that covered serving containers positioned thereon are heated before serving wherein each heating means includes a plurality of heater pads mounted to said shelf;

refrigeration means capable of receiving said cart therein and refrigerating the food items within the serving containers; and

a main controller delivering a predetermined times electrical voltage to each heater pad such that the temperature of each set of corresponding heater pads for each shelf when activated are the same, and wherein said main controller includes a three event, 24 hour, automatic timer.

19. The apparatus of claim 18 wherein said main controller includes a 4-pin, bayonet plug which connects directly to receptacle means within said cart.

20. A cart for supporting a plurality of trays having a plurality of food compartments and openings for supporting one of a plurality of serving containers containing food items, the cart comprising:

a plurality of shelves with each shelf having means for supporting at least one of the plurality of trays thereon and having heating means capable of conforming to the openings so that the serving containers positioned thereon are heated before serving, each heating means including a plurality of heater pads; and

each said heater pad having mounting means which mates with a box channel running generally the width of the cart at each said shelf to releasably secure each individual heater pad to said shelf and wherein electrical connection means connecting each said heater pad to corresponding temperature control means runs inside said box channel.

21. A cart for supporting a plurality of trays having a plurality of food compartments and openings for supporting one of a plurality of serving containers containing food items, the cart having interior and exterior surfaces and comprising:

a plurality of shelves with each shelf having means for supporting at least one of the plurality of trays thereon and having heating means capable of conforming to the openings so that the serving containers positioned thereon are heated before serving; and

each heating means including a plurality of heater pads each having separate heating control means, each corresponding heater pad for each shelf being connected to the same control means such that the heating requirements of each corresponding heater pad for any shelf when activated are the same and wherein each said heater pad has a mounting flange which mates with a box channel running the width of said cart at each said shelf to releasably secure each individual heater pad to said shelf.