High burst closure assembly for large packages

a technology for packaging and closure assembly, applied in the field of high burst closure assembly for large packages, can solve the problems of closure mechanism failure and opening, closure mechanism failure, prior attempts to incorporate an easy-to-use closure mechanism have been unsatisfactory, etc., and achieve the effect of high burst strength and easy-to-open configuration

Inactive Publication Date: 2009-03-12
ILLINOIS TOOL WORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]It is therefore an object of the present invention to provide a closure assembly for packages, particularly large bags, formed by form fill and seal or other methods, which provides for high burst strength in bottom filling or top filling configurations, to allow the bags to withstand dropping or shock loading without the closure mechanism bursting open, while allowing for an easy to open configuration.
[0010]It is therefore a further object of the present invention to provide such a closure assembly without significant increases in manufacturing and related costs.

Problems solved by technology

Prior attempts to incorporate an easy to use closure mechanism have been unsatisfactory due to the unique requirements of a large bag with a relatively heavy load.
This load can cause the closure mechanism to fail and open.
Similarly, dropping a filled bag onto a pallet or similar rough handling during transportation, as well as exposing a bag to elevated temperatures during transportation, can cause the closure mechanism to fail.
However, these methods have slow rates of production, as well as increased costs of production, and frequently do not result in a satisfactory product for the consumer.

Method used

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  • High burst closure assembly for large packages
  • High burst closure assembly for large packages
  • High burst closure assembly for large packages

Examples

Experimental program
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first embodiment

[0080]FIG. 27 is a cross-sectional view of high burst closure 11. High burst closure 11 includes first profile 12 and second profile 14. First profile 12 includes first upper separating portion 17 and first flange 18, integral with each other, formed from a single sheet of polymeric web or similar material. First profile 12 further includes interior flange 19 integrally formed with upper separating portion 17 or attached by a hard seal to the interior surface thereof. Second profile 14 includes second upper separating portion 21 and second flange 22. First peel seal 24 is formed between the lower end of interior flange 19 and a generally central portion of second profile 14. Alternatives for closing first and second upper separating portions 17, 21 are shown in FIGS. 31 and 32. In this, as well as the other embodiments of high burst closures, similar to the previously disclosed zippered embodiments, loads on the package walls or flanges cause a shear force on the peel seal, as shown...

second embodiment

[0081]FIG. 28 is a cross-sectional view of high burst closure 11. In this embodiment, the first profile 12 is formed from a first upper separating portion 17 which extends to first peel seal 24. First flange 18 is sealed to a generally central portion of first upper separating portion 17. Again, alternatives for closing first and second upper separating portions 17, 21 are shown in FIGS. 31 and 32.

third embodiment

[0082]FIG. 29 is a cross-sectional view of high burst closure 11. A single sheet of polymeric web or similar material is used to form first profile 12. This sheet forms upper separating portion 17 and is folded adjacent to a bottom of peel seal 24 and is then sealed to a generally central exterior portion of first upper separating portion 17, with the remaining portion of the sheet forming first flange 18.

[0083]FIG. 30 is a cross-section view of the first embodiment of the high burst closure of FIG. 27 (equally applicable to the embodiments of FIGS. 28 and 29) with the exterior of first and second flanges 18, 22 sealed to the interior of respective first and second bag walls 102, 104. Alternatively, the interior of the first and second flanges 18, 22 can be attached by adhesive or other means to the exterior of bag walls 102, 104.

[0084]FIG. 31 is a cross-sectional view of the first embodiment of the high burst closure of FIGS. 27 and 30 (equally applicable to the embodiments of FIGS...

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Abstract

The present disclosure relates to a high burst closure which allows for bottom filling of packages, such as large bags, and further provides increased resistance to damage from the dropping or shock loading of the filled package. This is achieved by providing profiles that combine an upper portion of one profile and its related flange, so as to form a juncture above a peel seal joining one profile to the other, so that external forces on a package or bag from bottom filling or shock loading are directed toward the juncture thereby causing a shear force against the peel seal or other frangible connection, thereby increasing the resistance of the package to external forces.

Description

[0001]This application is a continuation-in-part of application Ser. No. 11 / 728,477 filed Mar. 26, 2007 entitled “High Burst Zipper Assembly for Large Reclosable Packages” which claims priority under 35 U.S.C. §119(e) from provisional application Ser. No. 60 / 839,447, filed on Aug. 23, 2006, entitled “High Burst Slider Zipper for Large Bags and Method of Manufacture”, the contents of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to closure assemblies for packages which are large bags, particularly closure assemblies which achieve high burst strengths while allowing an easy-to-open configuration, and the methods for manufacture thereof.[0004]2. Description of the Prior Art[0005]Large packages, bags or pouches, such as those used for pet food, charcoal, cat litter and similar items are typically filled and sealed shut. These packages may be formed by form fill and seal (FFS) or by other methods. ...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): B65D65/26
CPCB31B19/90B65D33/2591B65D33/2508B31B2219/9019B31B70/8132
InventorKOENIGKRAMER, RUSTYANZINI, DAVID J.AUSNIT, STEVEN
OwnerILLINOIS TOOL WORKS INC