Patent ID: 7658542

Claim:
A flexible container for containing a liquid, including two overlaying walls of flexible material welded or bonded along a peripheral seam so as to define an inner sealed volume, said container comprising an outwardly protruding spout and an outflow channel connecting said spout with said inner sealed volume of said container, wherein one or several obstacles formed by welding or bonding together a portion of said two overlaying walls is or are located in said inner sealed volume substantially opposite and in the vicinity of the outflow channel thereby leaving open at least one restricted passage between the inner sealed volume and the outflow channel, the position of the one or several obstacles relative to the spout and the peripheral seam being such that a portion of the overlying walls including the spout and bounded by the obstacle or the obstacles and by folds directed substantially transversally with respect to said obstacles deflects or arches when liquid is present in the inner sealed volume, and wherein the obstacle has an elongated shape and extends between two ends overlapping the peripheral seam on either side of the spout by an amount that is less than 5% of the overall length of the peripheral seam.