Abstract: A self-cleaning valve used at the outlet of a container has an elongated flexible flattenable tube with an inlet end for receiving material to be dispensed from the container and an outlet end for dispensing the material. In the at-rest condition of the valve, a section of the tube extending from the outlet end is supported between a housing surface and a closure-cleaning lever member spring-mounted on the housing so that it pivots about a fulcrum. By pressing down on one end of the lever member, the tube can be opened so that material, forced out of the container, can be dispensed from the outlet end of the tube. After the material has been dispensed, the lever member is pivoted along the outside surface of the tube pressing the tube against the housing surface so that any material remaining within the tube is forced out of the outlet end.

Abstract: A method for manufacturing a container assembly adapted to store and dispense fluid material including a collapsible flexible container adapted to be stretched from an initial nominal position and to be collapsed to dispense fluid material stored therein, and a cap member adapted to be placed in operative engagement with a neck portion of the container configured to define a dispensing flow conduit which is placed in direct flow communication with the interior of the container when the cap member is mounted in assembled position on the neck portion of the container. In the manufacture of the container assembly, the container is first stretched from its initial nominal position to expand the volume thereof, and then filled with a fluid material to be stored therein and to be dispensed therefrom while in said stretched position.

Abstract: A container is formed with a multilayered wall structure including at least one layer of a plastics material and at least one layer of a multidirectionally microcrimped metallic foil. Initially, the wall structure is in the form of a preform or parison incorporating the multilayered wall structure and the preform is blow-molded to the desired shape. The preform can be blow-molded into a container with a complicated wall configuration. The metallic foil is substantially impervious to the passage of gases, vapor, liquids and microorganisms into or out of the container.