A packaging web is disclosed. The web is an elongate, flattened plastic tube having face and back sides delineating the faces and backs of a set of side by side bags. The tube includes an elongated top section and spaced sets of side seals each extending transversely from the bottom to a location near...http://www.google.es/patents/US6367975?utm_source=gb-gplus-sharePatente US6367975 - Packaging web and process
