Abstract: A container having a window for viewing the product contained therein and an associated method of manufacture is provided. The container is constructed of at least one body ply and a liner ply. The body ply defines at least one aperture therethrough such that when the body ply is wrapped into a tubular shape the aperture forms a window through the body ply into the container. The liner ply extends across the aperture in the body ply and has a sufficiently low opacity that allows the product in the container to be viewed through the window. The liner ply provides a moisture and gas barrier inside the container around the product. The container may include a label ply. The label ply defines at least one aperture therethrough. The cutting of the at least one aperture in the label ply is registered. The body ply defines at least one aperture therethrough corresponding to the at least one aperture in the label ply.

Abstract: An easy-opening closure is provided for hermetically sealing of an open end of a retortable container. The closure includes a metal end ring having a deformable outside peripheral area for being double seamed to the open end of the retortable container and having an inside area defining a large circular central opening to allow access therethrough to the interior of the container. An outside peripheral area of a membrane ring overlaps and is attached to the inside area of the metal end ring by a bond having predetermined shear and tensile force strengths. An inside peripheral area of the membrane ring extends inwardly into the circular central opening. A membrane patch is provided to cover the central opening and has an outer peripheral area overlapping and attached to an upper side of the membrane ring by a bond having predetermined shear and tensile force strengths.