BOLSA FLEXIBLE AUTOEXPANSIBLE

La presente invención se refiere a una bolsa autoexpandible y flexible que tiene una porción superior y un área de la garganta adyacente a la porción superior, la bolsa de caracteriza porque tiene un panel frontal, un panel trasero y un tirante extensible, estando los paneles frontal y trasero sobrepuestos uno del otro y sellados juntos a lo largo de sus bordes periféricos superior, laterales y de la base, teniendo los paneles superficies interiores y estando el tirante extensible unido a las superficies interiores de los paneles y localizado en el área de la garganta de la bolsa, teniendo el tirante extensible una configuración relajada y expandida y una configuración de esfuerzo intenso y plegada, estando inicialmente el tirante así sostenido en su configuración de esfuerzo intenso y plegada por la porción superior de la bolsa que expande el tirante a su configuración relajada y expandida cuando la porción superior de la bolsa es retirada, por medio de lo cual el área de la garganta de la bolsa de expande. A self-expanding flexible pouch (10) that can be used as the measuring device for reconstituting a concentrated product contained therein. The flexible pouch includes an extensible stay (40) located in the throat area of the pouch that is biased toward a circular or elliptical configuration but initially held substantially flat in a stressed condition by the pouch's sealed top portion. When the pouch's top portion is removed, the extensible stay expands to its unstressed circular configuration and thereby expands and opens the pouch's throat area. In a particularly preferred embodiment of the present invention, the pouch's bottom section is provided with a pleated bottom gusset panel (26) that is attached to the sidewall panels' (12, 14) inner surface. When the reconstituting fluid is poured into the pouch, the pouch's bottom gusset panel unfolds and drops downward which allows the pouch's bottom section to also expand and assume a substantially tubular configuration. Also disclosed are various barrier laminates from which pouches of the present invention can be made which protect the pouch's contents from light, moisture, and air, and also resist the absorption of essential oils, flavoring components, and nutritional elements found in the product contained within the pouch.