Easy-open container and closure assembly therefor
AssigneeSonoco Development, Inc.
InventorKrishnaraju Varadarajan
Life of this patent
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Abstract
A container comprises a container body defining a top opening, a sealing surface being defined on the container body encircling the top opening, and a closure sealed to the sealing surface by a heat-seal material comprising a blend of two different acidic ionomers having respectively higher and lower acid content such that the heat-seal material has an acid content intermediate between that of the two different ionomers, whereby the resulting heat seal strikes a balance between oil-resistance and age-up.
Claims25
A container, comprising:
- a container body defining a top opening, a sealing surface being defined on the container body encircling the top opening;
- and
- a closure sealed to the sealing surface by a heat-seal material comprising a blend of first and second acidic ionomers having respectively higher and lower acid content such that the heat-seal material has an acid content intermediate between that of the first and second ionomers.
A container, comprising:
- a container body defining a top opening, a sealing surface being defined on the container body encircling the top opening;
- and
- a closure sealed to the sealing surface by a heat-seal material comprising an acidic ionomer having an acid content of about 11% by weight.
A container, comprising:
- a container body defining a top opening;
- a metal end attached to the container body encircling the top opening;
- and
- a membrane closure sealed to the metal end by a heat-seal material comprising a blend of first and second acidic ionomers having respectively higher and lower acid content such that the heat-seal material has an acid content intermediate between that of the first and second ionomers.
A closure assembly for a container, comprising:
- a ring-shaped end member having a curl portion configured to be attached to a flange of a container by double-seaming, the end member further comprising a portion located radially inwardly from the curl portion and defining a sealing surface;
- and
- a flexible membrane closure configured to attach to the ring-shaped end member;
- wherein each of the end member and the closure has a heat-seal material disposed thereon for attaching the closure to the end member by heat-sealing, the heat-seal material comprising a blend of first and second acidic ionomers having respectively higher and lower acid content such that the heat-seal material has an acid content intermediate between that of the first and second ionomers.
A member for a closure assembly of a container, comprising:
- a ring-shaped end member having a curl portion configured to be attached to a flange of a container by double-seaming, the end member further comprising a portion located radially inwardly from the curl portion and defining a sealing surface, and a heat-seal material disposed on the sealing surface for attaching a membrane closure to the end member by heat-sealing, the heat-seal material comprising a blend of first and second acidic ionomers having respectively higher and lower acid content such that the heat-seal material has an acid content intermediate between that of the first and second ionomers.
A flexible membrane closure for a container, comprising:
- at least one structural layer of flexible material;
- and
- a heat-seal material joined to the at least one structural layer and exposed at one surface of the closure for heat-sealing to a sealing surface provided on a container, the heat-seal material comprising a blend of first and second acidic ionomers having respectively higher and lower acid content such that the heat-seal material has an acid content intermediate between that of the first and second ionomers.
Dependencies are inferred from the claim text.