Receptacles – Closures – With closure opening arrangements for means
Patent
1996-11-19
1998-05-19
Shoap, Allan N.
Receptacles
Closures
With closure opening arrangements for means
220254, 220270, 220359, 2291231, B65D 1740
Patent
active
057526141
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. The predetermined shear and tensile force strengths of the bonds between the closure components are designed to have sufficient strength to withstand shear and/or tensile forces created during retort processing of the container, while allowing easy-opening of the container by peeling of closure components.
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Lowry James L.
Nelson Brian E.
Hylton Robin A.
Shoap Allan N.
Sonoco Products & Company
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