Methods of making reclosable packages for vacuum, pressure and/or liquid containment

Abstract

A method of manufacturing flexible containers that are hermetically resealable. Each resealable container comprises a receptacle and a pair of plastic zipper strips. The zipper strips are flattened at the ends within the side seal regions and are joined to each other, without substantial deformation of the closure profiles, in respective transition areas substantially contiguous with the side seals. These transition areas of zipper strip joinder assist in providing a leakproof transition from the openable section of the zipper to the side seals, where the closure profiles are fused and flattened (i.e., crushed).

Description

Method of making reclosable packages for vacuum, pressure and / or liquid containment Related Patent Applications This application is U.S. Patent Application Serial No. 10 / 896,769, filed July 21, 2004, entitled "Leakproof Zipper End Crush for Reclosable Bag and Related Method of Manufacturing" continuation-in-part of the US patent application and claims priority thereto. Background technique The present invention generally relates to flexible containers having reclosable plastic zippers, such as bags, bags or other packages. In particular, the present invention relates to resealable bags, bags or other packages for containing vacuum, pressure or liquids. To ensure airtightness or airtightness, packagers typically seal their flexible containers to the extent that they cannot be resealed after the seal is broken. Many conventional reclosable flexible containers do not maintain the desired vacuum, pressure or liquid-holding properties that the container had before it was fir...

AI Technical Summary

Problems solved by technology

This leak causes a loss of vacuum

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