Resealable flexible packages having hook design tear line

摘要

A reclosable bag with a line of weakened tear resistance having a fish hook or hook shaped perforations assures a straight-line tear across the bag. The hook-like perforations avoid cross-tearing of the package towards the top edge or towards the bottom edge of the package and provide an easy access to the packaged goods. The non-symmetrical hook perforations have a major central portion or vertical center section substantially parallel to each other and to the sides of the bag, a rounded shoulder and a rounded foot. The tear line extends from one side edge of the bag to and stops short before reaching the other side edge of the bag. The non-symmetrical hook perforations are obtained by cutting a bag with a cutting knife with hook-designed cutting edges that mirror the perforations. The cutting knife may be incorporated onto rotary film sealing and crimping heads for providing top and bottom permanent seals on successively perforated bags. The bag may also comprise a reclosable seal located below the line of weakened tear resistance. The bag may also contain dimples embossed into either the front or back panels across the line of weakened tear resistance. The dimples assist in separating the bag's front and back panels during the opening process.