Patent ID: 6851578
Filing Date: 2005-02-08
Classification: B65D

Abstract:
1. A container comprising: a self-standing container body including a wall formed of a soft sheet and a bottom, wherein said bottom is expandable when content is contained within said self-standing container body such that said container stands unaided; a pouring port disposed at an end portion of said self-standing container; and a check valve mounted in said pouring port, said check valve being operable to open when a pressure within said self-standing container in greater than a pressure outside of said self-standing container and close when the pressure outside of said self-standing container is greater than the pressure within the self-standing container, wherein an inside of said container is evacuated by a vacuum that is established by a weight of the content contained within said self-standing container body, and said wall contains a first pair of outward folds and a second pair of outward folds extending from said pouring port towards said bottom, said first and second pairs of outward folds being positioned such that as an amount of the content contained within said self-standing container body is reduced, said first and second pairs of outward folds cause said self-standing container body to form a square shaped content column just below said pouring port so that said self-standing container body does not fold over when said container stands upright.