NOVEL PLASTIC BAG, A NOVEL INTERMEDIATE PRODUCT, METHODS FOR MAKING THE BAG AND INTERMEDIATE PRODUCT, AND IMPROVED POUCH MACHINE

摘要

An intermediate product for making bag closures wherein an elongated substrate has formed on it a pair of elongated attachment lanes having complementary fastening elements to provide an attachable-detachable closure. The lanes extend parallel and are spaced apart. A perforation line is formed in the substrate between the lanes. The tape is folded by being pulled through a slot along the perforation line to place said lanes in face-to-face engagement. The product is used in a method for making bags or pouches and on a machine modified to seal partially one side of the closure to one side of the mouth of bags or pouches being made and to seal completely the other side of the closure to the other side of the bag of pouch mouth. The perforation is separated to separate the lanes and create an attachable-detachable closure. Interlocking projections can be included in the closure.

主权项

1. An intermediate product for making bag closures comprising an elongated substrate having opposed side edges, a pair of elongated attachment lanes having complementary fastening elements to effect an attachable-detachable closure sealed to said substrate, extending parallel and being spaced apart, with at least one elongated attachment lane coterminal with one side edge of the elongated substrate, a single perforation line formed in said substrate midway between said lanes, wherein the perforation line comprises from about 50% lands and about 50% cut through to about 10% lands and about 90% cut through, whereupon said substrate is foldable along said single perforation line to place said lanes in face-to-face registry engagement.