초록 ▼

A container for holding material such as foodstuff to be heated in a microwave oven, including an open-topped tray and a lid for covering the tray to form a closed cavity, wherein at least one surface of the container has one or more electrically conductive plates and/or microwave-transparent apertu

A container for holding material such as foodstuff to be heated in a microwave oven, including an open-topped tray and a lid for covering the tray to form a closed cavity, wherein at least one surface of the container has one or more electrically conductive plates and/or microwave-transparent apertures for generating a microwave field pattern having a higher order than that of the fundamental modes of the container, such that the field pattern so formed propagates into the contained material to thereby locally heat the material.

대표청구항 ▼

A package of material to be heated in a microwave oven, comprising a container and a body of material to be heated disposed in said container, said container comprising an open topped tray carrying said body of material and a lid covering said tray to form a cavity, said container and said body defi

A package of material to be heated in a microwave oven, comprising a container and a body of material to be heated disposed in said container, said container comprising an open topped tray carrying said body of material and a lid covering said tray to form a cavity, said container and said body defining fundamental modes of microwave energy in said cavity, wherein the improvement comprises at least one surface of the container being provided with mode generating means for generating, within the cavity, at least one microwave energy mode of a higher order than that of said fundamental modes, said mode generating means being dimensioned and positioned with respect to the body of material in the container for causing microwave energy in said at least one higher-order mode to propagate into the body of material to thereby locally heat the body of material, said mode generating means comprising at least one region of a first type surrounded by a region of a second type, said first and second types being respectively electrically conductive and microwave-transparent, and the dimensions of said at least one first-type region and the width of said second-type region surrounding said at least one first-type region being sufficient to cause microwave energy in said at least one higher-order mode to propagate into the body of material as aforesaid.