The present invention is a gasket that is capable of venting gas from a positive pressure gas generating system in a package, such as a bottle or a container. In so doing, the gasket prevents the liquid contained within the package from leaking out. The gasket has a core that is impermeable to liquids,...http://www.google.es/patents/US6902170?utm_source=gb-gplus-sharePatente US6902170 - Means for venting gas pressure buildup from a package
Means for venting gas pressure buildup from a package
