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Leak resistant tamper evident reclosable plastic bag

a plastic bag and leak-proof technology, applied in the field of containers, can solve the problems of bag use (potential contamination) and achieve the effect of reducing the risk of leakag

Inactive Publication Date: 2005-12-15
ILLINOIS TOOL WORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a reclosable plastic bag that can be used for storing liquids and other perishables. The bag has two panels sealed to form a container with a bottom and an openable top. It includes lips that are sealed to one another along their edges and can be opened and closed repeatedly. The lips have a removable element that indicates if the bag has been used or not. The bag also has two closure elements that can be sealed and unsealed to provide better leak-proof sealing. The large lips provide easy handling and the cutouts in them allow for easy opening. The invention improves over previous designs and has the advantages of being well-suited for containing liquids and other perishables.

Problems solved by technology

When the removable element is no longer attached this indicates that the bag may have been used (and potentially contaminated).

Method used

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  • Leak resistant tamper evident reclosable plastic bag
  • Leak resistant tamper evident reclosable plastic bag
  • Leak resistant tamper evident reclosable plastic bag

Examples

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Embodiment Construction

[0025] The present invention is directed to containers and in particular to novel reclosable plastic bags, tamper evident plastic bags, and closure profiles for reclosable bags. The general principles for making reclosable plastic bags are fairly well-known and are typified in numerous prior patents. Various developments in the reclosable plastic bag art, including methods of manufacture and various die assemblies used to manufacture such bags, are disclosed in U.S. Pat. No. 6,217,216 to Taheri (describes methods for forming bags), U.S. Pat. No. 4,755,248 to Geiser et al. (die assemblies), U.S. Pat. Nos. 4,101,355 (using adhesives to join a closure profile to a bag) and 3,338,284 (forming a bag film web using a single extrusion operation) to Ausnit, U.S. Pat. Nos. Re. 28,959, 29,208 and 28,969 to Naito, U.S. Pat. No. Re. 33,674 to Uramoto, and U.S. Pat. No. Re. 26,991 to Luca, (interlocking closure profiles), all of which are hereby incorporated by reference in their entireties for ...

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Abstract

A reclosable plastic bag includes lips that are adjacent to the opening near the top of the bag and which are initially joined to one another by a removable element. The removable element when attached indicates that the bag has not yet been used. When the removable element is no longer attached this indicates that the bag may have been opened and the contents contaminated. The reclosable plastic bag also includes a closure element for sealing and unsealing the top of the bag that incorporates two substantially parallel, but spaced apart, zippers. This combination of two zippers and the spacing between them reduces the likelihood that the closure will leak or inadvertently open.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation of U.S. application Ser. No. 10 / 093,565, filed Mar. 8, 2002, which is incorporated in this application in its entirety by this reference.BACKGROUND OF THE INVENTION [0002] The present invention relates generally to containers and more specifically to reclosable plastic bags. [0003] Reclosable plastic bags are used for many purposes, including transporting and storing food products and other materials. Reclosable bags are often preferred over other available bags because of numerous advantages, including that they are easy to close and reopen for access without compromise of integrity when closed. [0004] Typically, such bags are reclosable using a zip-action, locking reclosable closure. Unfortunately, when using such a bag for a first time, there is currently no way of knowing if the bag is sanitary, has been used, tampered with or otherwise contaminated. This is particularly important if the contents t...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65D33/00B65D33/25B65D75/58
CPCB65D33/004B65D75/5805B65D33/2566B65D33/2533
Inventor TAHERI, NOSSI
Owner ILLINOIS TOOL WORKS INC
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