(57) A susceptor bag (20) for microwave heating of food products, such as french fries,
fish sticks, apple turnovers and burritos, is formed from a single flexible sheet
comprising a layer (16, 28) of metal or other electroconductive material having microwave
susceptor thickness, supported on a paper substrate material (12, 24). The flexible
sheet is folded on itself to form a sleeve (20) which houses and engages the food
product. The thin metal layer (16, 28) is provided only in the regions where the food
is located. The metal layer (16, 28) usually is overlied by a polymeric film layer
(14, 26) or a release coating. By providing the thin metal (16, 28) upon application
of microwave energy, the interior of the food product (30) becomes heated to a desired
edible temperature while the exterior becomes crispened by thermal energy generated
by the thin metal layer.
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