Sleeve for crisping and browning of foods in a microwave oven and package and method utilizing same

Abstract From the Canadian patent

A microwave browning and crisping sleeve as well as a package assembly and method of microwave heating of food using the sleeve, wherein a paperboard strip has a microwave interactive layer affixed over one surface of the paperboard strip, the paperboard strip being subdivided by fold lines into at least five panel portions, wherein opposite ends of the paperboard strip are connected end-to-end in a manner creating a paperboard sleeve having the surface to which the interactive layer is fixed as its inner peripheral surface and wherein the, fold lines are disposed at positions which enable the sleeve to be erected and collapsed between a first configuration wherein the sleeve is flattened …