A barrier spout and cap assembly mounted on a flexible bag or pouch of plastic laminate film having barrier material incorporated therein to prevent the permeation of various gases and especially oxygen. The structures of the spout and its cooperating removable and replaceable cap are such that they...http://www.google.es/patents/US4362255?utm_source=gb-gplus-sharePatente US4362255 - Barrier spout and cap for flexible bags or pouches
Barrier spout and cap for flexible bags or pouches
