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Microwave food package
| Details |
Inventors: Garvey, Joseph F.; Larson, Curtis L.; LePere, Pierre H.;
Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN)
Primary Examiner: Leung; Philip H.
Assistant Examiner:
Attorney, Agent or Firm: Griswold; Gary L., Kirn; Walter N., Binder; Mark W.
A microwave food package having a chamber for receipt of a foodstuff. An orifice is formed in the package for dispensing the foodstuff in a flowable state after heating in a microwave oven. The package is insulated to permit handling of the package immediately after heating of the foodstuff. |
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DETAILED DESCRIPTION Referring now to FIGS.
1-4, there is shown a microwave food package according to the present invention generally designated by the reference numeral 10.
Generally, the microwave food package 10 comprises a bag or pouch 12 constructed from flexible, microwave transparent polymeric material.
Preferably, the material is such that bag 12 may be formed by folding the sheet over on itself and bonding aligned portions of facing surfaces adjacent side edges 14a and 14b and end edges 16a and 16b to form an enclosed chamber 18.
The bonding may be accomplished such as by heat sealing the sheet material together or by use of a suitable adhesive, or by any other suitable means.
Alternatively, bag 12 may be constructed in other arrangements, such as by sealing two or more separate sheets (not shown) together to form the chamber 18, or by sealing the ends of a tube like structure.
In the preferred embodiment of the invention, the bag is constructed from a polymeric film having two layers, an inner layer (not shown) that is heat sealable to itself, and an outer layer (not shown) that provides strength and support to the heat sealable layer and also acts as a moisture barrier to protect the foodstuff.
The following is a non-limiting list of materials suitable for use in constructing the heat sealable layer: polypropylene, medium density polyethylene, ionomers, heat sealable polyesters, copolyesters, or blends of polyester and copolyester.
The following is a non-limiting list of material suitable for use in constructing the support layer: polypropylene, polyester, and nylon.
In some applications, it may be desirable to incorporate an oxygen barrier layer (not shown) into the film to prolong the shelf life of the foodstuff when placed within the package, such as for "shelf stable" foodstuffs that don't require refrigeration.
Preferably the oxygen barrier layer is located intermediate the heat sealable layer and the support layer, to protect the oxygen barrier layer from abrasion or other damage
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