OPENING DEVICE FOR PACKING CONTAINER

摘要

PURPOSE: To ease discrimination of an opening strip at the initial stage of tearing the opening strip by preventing wrapping material from tearing to thinner layer with provision of a region impossible to heat-seal at a portion of the opening strip, and providing a mark at an external part of the opening strip. CONSTITUTION: A packaging container 1 is provided with an opening strip 10 inserted in a lateral seal fin 3 of the container 1. The opening strip 10 extends from the spot 11 forming a spout of the container through a longitudinal sealing seam 2 to exterior of the packing container. The opening strip 10 is coated with a region 13 impossible to be heat-sealed at the spot where the strip leaves the lateral seal fin 3 at least at a side of it. The region 13 impossible to be heat-sealed is fused with hatched region 14 of the opening strip 10 lying outside the packaging container 1.