Inductive heating apparatus for cooking thin dishes such as omelets, quiches or the like

• US 4,987,828 A
• Filed: 11/30/1988
• Issued: 01/29/1991
• Est. Priority Date: 12/01/1987
• Status: Expired due to Fees

• Current Assignee: Electricitã© De France
• Original Assignee: Electricitã© De France
• Inventors: Nuns, Jacques, Girault, Alain
• Primary Examiner(s): Hornsby, Harvey C.
• Assistant Examiner(s): Spisich, Mark
• Application Number:
  US07/277,818
• Time in Patent Office: 790 Days
• Field of Search: 99/386, 99/373, 99/423, 99/443 C, 99/443 R, 99/DIG. 14, 219/10.493, 219/10.69, 219/10.71, 198/463.1, 198/473.1, 198/711, 198/803.14
• US Class Current: 99/443.00C
• CPC Class Codes: A21B 1/48 with surfaces in the form of an endless band
• CPC Class Codes: A21B 2/00 Baking apparatus employing high-frequency or infrared heating
• CPC Class Codes: A21B 5/03 for baking pancakes
• CPC Class Codes: H05B 6/1272 with more than one coil or coil segment per heating zone
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
• CPC Class Codes: Y10S 99/14 Induction heating

Abstract

The apparatus comprises an endless conveyor band (2) of insulating material on which are mounted at even distances apart receptacles (7) composed of a metal adapted to receive separate portions of a dish to be cooked and inductors (10a, 10b) disposed below the upper reach (6) of the conveyor. The inductors have a diameter roughly equal to one-half of the diameter of the receptacles and are disposed in at least two rows in the direction of movement of the conveyor (2) symmetrically relative to the axis of movement of the receptacles. The inner edges of the inductors (10a, 10b) are located beyond a vertical plane containing the axis of movement of the receptacles (7) so as to insure a homogeneous heating of the receptacles.

Claims

1. An apparatus for cooking thin dishes such as omelets, quiches or the like, comprising an endless conveyor having an upper reach movable in a given direction and a lower reach, substantially round receptacles adapted to receive separate portions of said dish and mounted at even distances apart on said upper reach of the conveyor, and inductive heating means for heating said receptacles, said heating means comprising a plurality of spiral electric inductors having a generally circular shape disposed below said upper each of said conveyor, each of said inductors having a diameter approximately equal to one-half of the diameter of the receptacles and being disposed in two staggered rows extending, in said given direction of movement of said upper reach of the conveyor, symmetrically relative to an axis of movement of the receptacles, wherein said axis of movement is horizontal, and wherein adjacent inductors in said two rows extend in respectively opposite directions horizontally through a central vertical plane of said conveyor whereby said adjacent inductors are staggered and overlap with respect to said vertical plane, and wherein said adjacent inductors are interconnected such that electric current flows through them in respectively opposite directions, so as to ensure a homogeneous heating of said receptacles.

2. An apparatus according to claim 1, wherein said conveyor comprises a continuous band and said receptacles are constituted by pans having bottoms and pillars fixing the pans to the conveyor, each pillar being connected to the bottom of a pan and extending through said conveyor band, a gap being provided between the bottom of each pan and the conveyor band.

3. An apparatus according to claim 1, wherein each of the receptacles has an edge on which is provided an outer coating which is a good conductor of electricity.

4. An apparatus according to claim 3, wherein said coating which is a good conductor of electricity is a silver brazing.

5. An apparatus according to claim 1, wherein the inductors are connected in series in groups, and the groups of inductors connected in series are connected in parallel to an AC power supply.

6. An apparatus according to claim 2, wherein the conveyor band is made from a flexible material which withstands high temperatures on the order of 200°

C.