Reclosable bag and zipper therefor

摘要

A reclosable zipper fastener has a slider 40 and first and second profiles 24, 26. Each profile has a body 32, 34 and a flange 28, 30 which has three zones which are, successively and in the direction away from the body, an anti-seal zone 42, 43, a line-of-weakness formation zone 44, 45 and a sealing zone 46, 47. The zipper can be used in a bag in which it is secured internally of a top seal 20, the line-of-weakness zones 44, 45 forming lines along which a top portion of the bag can be removed to open the bag. The bag can then be sealed using the zipper. A tamper-evident feature is thus provided.

主权项

1. A method of making a reclosable container with a zipper, comprising the steps of:
providing a zipper which comprises first and second profiles each having a portion extending longitudinally of the profile and being shaped for releasable engagement with the corresponding portion of the other profile, at least one of the profiles having a longitudinally extending flange portion; providing a substrate; applying a sealing means thereby sealing the longitudinally extending flange portion to the substrate, wherein the flange portion includes: a first antiseal zone which does not seal to a substrate during the step of applying the sealing means; a second line-of-weakness-forming zone which forms in said substrate, by said step of applying a sealing means, a line of weakness extending in the longitudinal direction of the zone; and a third seal zone which forms a longitudinally-extending seal with the substrate during the step of applying the sealing means, formed simultaneously with formation of said second, line-of-weakness forming zone during the step of applying the sealing means; and wherein the step of applying the sealing means includes the steps of applying heat and pressure and is applied to the first, second and third zones.