Container with self-closing one-way valve

摘要: A container for fluid or the like including a pair of closely confronting flexible walls unsecured along portion thereof to form supply opening container. The includes one-way valve comprising flat sheet material forming flattened sleeve-like structure open at opposite ends and respectively secured walls. An arcuate sealforming spring member is extends across outside one with convex side facing same draw thereto into sealing relation. oppositely curving partially expanded members are located between said walls, about an axis extending in direction structure, concave sides another, so that can be squeezed expand balloon outwardly together on large inlet passageway