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US 4,933,193 AGranted
Microwave cooking package
AssigneeE. I. Du Pont de Nemours and Company
InventorJohn R. Fisher
Life of this patent
Estimating the term…
Abstract
A package for microwaving heating or cooking a food item such as an egg roll, which requires surface browning or crispening, comprises a vented tray, a drapable, liquid permeable, microwave susceptive composite material, draped over the food item, and a film lid covering the tray and conformed to the shape of the food item.
Claims8
A vacuum skin package useful for storing, heating, browning or crispening, and serving at least one food item, said package comprising:
- (a) a rigid, gas impermeable tray comprising a floor, a circumferential wall attached to said floor, and a rim at the upper end of the circumferential wall, wherein the circumferential wall contains at least one vent capable of venting air during vacuum skin packaging;
- (b) at least one food item contained in said tray;
- (c) a microwave susceptive, liquid and vapor permeable, drapable composite material having sufficient microwave susceptivity to brown or crispen the surface of said at least one food item in a microwave oven without substantially impeding the ability of microwave energy to penetrate the susceptor material and cook said at least one food item, said composite material being draped over and contacting said at least one food item;
- and
- (d) a polymeric, gas impermeable film covering said tray, said at least one food item, and said composite material, said film being vacuum skin formed onto said tray such that said film extends across the rim of the tray and down the outer portion of the circumferential wall adjacent to the rim, said film conforming to the shape of said at least one food item and said composite material within the tray and causing the composite material to be held in tight conformity to the shape of said at least one food item, said film further forming a mechanical crimp over the rim of the tray;
- said tray and film being sufficiently permeable to microwave radiation to allow said at least one food item to be heated in said package in a microwave oven.
3 more elements
A process for skin packaging food, comprising the steps of:
- (a) placing a food item in a rigid, gas impermeable tray comprising a floor, a circumferential wall attached to said floor, and a rim at the upper end of the wall, wherein the wall contains a vent capable of venting air during vacuum skin packaging;
- (b) draping a microwave susceptive, liquid and vapor permeable, drapable composite material over said food item, said composite material having sufficient microwave susceptivity to brown or crispen the surface of said food item in a microwave oven without substantially impeding the ability of microwave energy to penetrate the susceptor material and cook the food item,;
- (c) positioning a film above the rim of the tray, said film having sufficient melt strength to be conformable to said tray and food while retaining its integrity;
- (d) heating the film until it softens;
- (e) placing the film in contact with the rim of the tray such that the film covers the tray, the food item, and the composite material;
- and
- (f) evacuating the air from the volume contained within the tray, beneath the film, such that said film conforms to the shape of said food item and said composite material within the tray and causes the composite material to be held in tight conformity to the shape of said at least one food item, said film further forming a mechanical crimp over the rim of the tray;
- said tray and film being sufficiently permeable to microwave radiation to allow said at least one food item to be heated in said package in a microwave oven.
5 more elements
Dependencies are inferred from the claim text.