Patent Application
20050013905
The present invention is directed to an insulated pouch. More particularly, the invention is directed to an insulated pouch suitable for use with a food product. The insulated pouch, with food product therein, may be subjected to microwaves in a microwave oven so that the food product can be heated to the desired serving temperature. Subsequent to heating in the microwave oven, the insulated pouch may be conveniently held by a consumer while the heated food product is being consumed.
In the modern hectic world, ready to eat meals are highly desired. While, for example, ready to eat meals comprising soups, pastas and meats are available, it is very difficult to find such meals in convenient to heat and eat packaging.
Meals packaged in pouches with perforations have been sold. Such meals, however, are typically boiled in water and drained prior to serving. The resulting heated meals cannot be served in the perforated packaging they are boiled in and are typically served on conventional plates and with kitchen utensils.
Sauces have been packaged in microwave safe packages that are insulated. Particularly, such sauces are packed in a bag having a small orifice so that the sauce can be poured out onto a meal being consumed with conventional dishware.
It is desirable to have a food product in an insulated pouch that can be heated in a microwave oven whereby the food product may be consumed directly out of the insulated pouch. This invention, therefore, is directed to an insulated pouch with a food product therein. The insulated pouch can be held in the hand of a consumer after heating and the food product may be conveniently consumed out of the insulated pouch without the need for conventional dishware.
Additional Information
Efforts have been disclosed for making food packages. In U.S. Pat. No. 5,241,150, a microwave food package having an orifice to dispense foodstuff is described.
Other efforts have been disclosed for making food packages. In U.S. Pat. No. 6,183,789, meals packaged in mesh material are described.
Still other efforts have been disclosed for making food packages. In U.S. Application No. 2001/0001674 A1, a microwavable meal kit and food packaging system are described.
None of the additional information above describes an insulated pouch having heated food product therein whereby the food product may be consumed directly out of the insulated pouch without the need for conventional dishware and while being held in the consumer's hand after heating.
In a first aspect, the present invention is directed to an insulated pouch comprising:
In a second aspect, the present invention is directed to a method for consuming a food product using the insulated pouch of the first aspect of this invention.
Flexible bag, as used herein, means a bag constructed out of polymeric material. Insulating layer means a layer that can surround at least a portion of the flexible bag and suitable to act as a heat barrier. Food product, as used herein, means a food item suitable for heating in a microwave oven and for consuming directly out of the insulated pouch of this invention. Consuming food product directly from the insulated pouch means by drinking food product, or eating food product with a fork or spoon. Preferably, consuming food product directly from the insulated pouch means with a fork or spoon. Held by a consumer after heating means comfortably held in the hand of the consumer (i.e., not burning) while the consumer is consuming all of the food product.
The subject matter regarded as the invention is particularly pointed out and distinctly claimed in the concluding portion of the specification. The invention, however, may be best understood by reference to the following description taken in conjunction with the accompanying drawing figures in which:
The general requirements of the flexible bag that may be used in the insulated pouch of this invention are that the bag can be closed (e.g., sealed), is suitable to hold a food product for heating in a microwave, is not permeable to water and is suitable to have an opening means that, when opened, is large enough to enable a consumer to consume food product directly from the insulated pouch, and preferably, with a fork or spoon.
Illustrative examples of the types of material that can be used to make the flexible bag of the insulated pouch of this invention include, but are not limited to, a polyolefin, polypropylene, polyethylene, polyester, polyimide, polyamide, blends thereof, copolymers thereof and the like. In a preferred embodiment, the flexible bag of this invention is constructed of at least two layers wherein the inner layer is heat sealable to itself, and the outer layer provides strength and support to the heat sealable layer and acts as a moisture barrier to protect the food product within the flexible bag. In a most preferred embodiment, the flexible bag of this invention has a heat sealable inner layer comprising polyester or polyethylene. In another most preferred embodiment, the flexible bag of this invention has an outer support layer comprising polyimide, polyamide, polyester or polypropylene.
Regarding the flexible bag, it is within the scope of this invention to incorporate an oxygen barrier layer into the same so that the shelf life of the food products (especially ambient stable products) is prolonged. In a preferred embodiment, the oxygen barrier layer is located in between the inner and outer layers and comprises polyvinylidene chloride, ethylene vinyl alcohol or a combination thereof.
The flexible bag suitable for use in this invention may be made by conventional techniques that include, without limitation, co-extrusion steps, laminating steps or both co-extrusion and laminating steps. Preferred flexible bags suitable for use with this invention are often made available from suppliers like Amcor Corporation, Douglas Plastics and CLP Packaging Solutions, Inc.
The insulating layer suitable to cover at least a portion of the flexible bag may be made of any material that does not interfere with the integrity of the flexible bag and heating process with microwaves, and that has the thermal ability to enable handling of the flexible bag immediately after heating. In addition to allowing for handling, it is preferred for the insulating layer to enhance heat retention of the insulated pouch after the food product is heated.
Illustrative examples of the types of materials that may be used to make the insulating layer are paperboard, foams of polyester, polypropylene, blends thereof or copolymers thereof. The preferred foams suitable for use in the insulating layer are those comprising polyester and/or polypropylene, as made commercially available from suppliers like Cryovac Sealed Air Corporation and E.I. duPont de Nemours & Company. The paperboard suitable for use in this invention is made available from suppliers like MeadWestvaco Corporation and Graphic Packaging Corporation.
In a preferred embodiment, at least about 50%, and preferably, at least about 60%, and most preferably, at least about 65% to about 85% of the total outer surface area of flexible bag is covered by the insulating layer.
The food products suitable for use in the insulated pouches of this invention are those which are often heated in a microwave oven. Such food products can comprise soups, pastas meats, rice, potatoes, cheese, (e.g., for dipping food items like chips) vegetables or a combination thereof and may be shelf stable or require refrigeration. Preferred superior food products for use with the insulated pouch of this invention are made commercially available by Unilever Bestfoods under, for example, the Lipton, Ragu, Bertoli and SlimFast brands.
Turning to the Figures,
Turning to
In an especially preferred embodiment, insulating layer 16 is sleeve-like and heat sealed (or glued with an adhesive) at edges 16a and 16b. In yet another especially preferred embodiment, insulating layer 16 is placed on the flexible bag 12 after the same is filled with food product 14 and sealed. Moreover, it is generally preferred that the bottom of insulating layer 16 is placed at least 0.5 cm higher than the bottom of flexible bag 12 so that the insulated pouch can stand, and preferably, from about 0.5 to about 3.0 cm higher than the bottom of the flexible bag 12. Also, it is generally preferred that the insulating layer 16 exceeds the sides of the flexible bag 12 by at least about 0.75 cm, and preferably, by at least about 1.0 cm to about 2.5 cm.
It is particularly noted that in a most preferred embodiment, the walls which make up the flexible bag and the insulating layer are, independently, from about 50 to about 2000 microns thick. In another most preferred embodiment, the temperature of insulating layer at the portion that contacts the human hand is about 25 to about 50% less than the temperature of the food product after the food product is heated to the desired serving temperature in a microwave oven. Still in another most preferred embodiment, the insulated pouch of this invention is square or rectangular-like with dimensions that do not exceed 25.0 cm but are preferably between about 8.0 to about 15.0 cm.
It shall be understood that the foregoing summary and detailed description of the invention are not intended to be limiting, and are exemplary of the inventive features that are defined in the claims.
