A flexible bag formed from at least one plastic sheet folded to form a tube and provide overlapping, longitudinally-extending margins, is disclosed. The overlapping margins are joined by a series of longitudinally-spaced bonds, typically heat seals. A membrane permeable to sterilizing vapor and which...http://www.google.fr/patents/US4057144?utm_source=gb-gplus-shareBrevet US4057144 - High strength bag for storing materials in sterile condition
High strength bag for storing materials in sterile condition
