Tabbed container seal and method of manufacture

Inactive Publication Date: 2008-03-27
TEKNI PLEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]In use, a tabbed container seal of the invention is sealed over the access opening of a container by thermally sealing (i.e., by conduction or induction) the sealing surface layer of the sealant sheet onto the container finish (i.e., onto the rim surrounding the access opening) to seal the opening. The tab member, being metal-free, does not interfere with the thermal sealing process and does not adhere to any portion of the container finish

Problems solved by technology

Such seals can provide evidence of product tampering, since they are typically destroyed by the process of removing the seal.
During the induction sealing process the tab can become sealed to the threaded side of the container finish, which is generally undesirable.
In this arrangement, the tab can become sealed to the closure, which is also undesirable.
In addition, the shape of the tab can adversely influence the induction sealing of the seal to a container finish.
The variability in bonding streng

Method used

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  • Tabbed container seal and method of manufacture
  • Tabbed container seal and method of manufacture
  • Tabbed container seal and method of manufacture

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Embodiment Construction

[0037]As used herein and in the appended claims, the term “closure” and grammatical variations thereof, refers to a lid or cap, such as a threaded cap, a lug-type cap, a snap-cap, and the like, that is designed to be repeatedly secured to and removed from a container finish, such that when the cap or lid is secured to the container finish, a seal is formed that protects the contents of the container from contamination and leakage.

[0038]The terms “lining material” and “liner” refer to a sheet material that is compressible and preferably semirigid, and is suitable for use within a closure to provide a resealable seal between the closure and a container finish. The term “liner” also refers to a section of lining material that has been cut to fit snugly within a closure against the upper inside surface thereof.

[0039]The term “seal”, when used as a noun, refers to a film or multilayer laminate material that is adhesively secured or heat-sealed over the finish of a container to provide an...

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PUM

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Abstract

An improved container seal including at least one metal-free tab member is provided. The container seal comprises a flexible, metal-free cover sheet and a flexible sealant sheet. The cover sheet comprises at least one layer of a flexible sheet material and includes a body portion that is sized and shaped to at least cover a container finish and has at least one metal-free tab portion extending from the periphery of the body portion. The flexible sealant sheet comprises a thermoplastic sealing surface layer, an inner surface layer and a layer of metal foil. The flexible sealant sheet is of the same size and shape as the body portion of the cover sheet. The inner surface of the sealant sheet and the inner surface of the body portion of the cover sheet are bonded together in opposed, congruent contact with each other. A method of manufacturing the container seal is also provided.

Description

FIELD OF THE INVENTION[0001]The invention relates to improved container sealing materials and methods of manufacture thereof. More particularly, the invention relates to improved container seals having a tab portion, and methods of manufacturing the tabbed container seals.BACKGROUND OF THE INVENTION[0002]It is common practice to seal a container with a sheet material, such as paper, a polymeric film, aluminum foil, or a laminate of paper, polymeric film and / or aluminum foil. The use of such seals, in many cases, has been imposed on the packaging industry by FDA regulations, as a protection against product tampering. Such seals can provide evidence of product tampering, since they are typically destroyed by the process of removing the seal. It is also common to line the inner surface of container closures with a moderately compressible material, such as a polymeric material, pulp board, or a multilayer laminated combination thereof. When a closure containing the liner material is sec...

Claims

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Application Information

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IPC IPC(8): B65D41/00B65D17/34B65D51/00
CPCB65D51/18B65D77/2024B65D2577/205B65D2251/0093B65D2251/0015
Inventor YOUSIF, PAUL E.
Owner TEKNI PLEX
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