A heating system heats casseroles placed on trays on a passenger plane. The heating system includes heating plates vertically arranged at regular intervals to receive the casseroles between adjacent heating plates to heat each casserole from above and from beneath. The heating plate includes a ceramic...http://www.google.de/patents/US5028761?utm_source=gb-gplus-sharePatent US5028761 - Food service cart with a heating system, and trays and casseroles for such a food service cart
