POLYMERIC BAGS

摘要

The present invention relates to improvements for the manufacturing of a wave-cut bag, more specifically a wave-cut bag with improved tie-flaps. Disclosed is a process for intermittently incrementally stretching and imparting a rib-like pattern to a collapsed tube of a blown film extrusion process. The incrementally stretched collapsed tube is particularly well suited for constructing wave-cut trash bags with a rib pattern on the tie-flaps of the trash bags. Further disclosed is a wave-cut trash bag with a rib pattern on its tie-flaps and surrounding area. The process is further well suited for constructing wave-cut trash bags with a rib pattern on a central body of the trash bags.

主权项

1. A bag formed from a collapsed tube of polymeric film, the bag comprising:
a first panel and a second panel, the first panel and the second panel joined along a first side edge, a second side edge, and a bottom seal proximate to a bottom edge, the first side edge defined by a first edge of the collapsed tube and the second side edge defined by a second edge of the collapsed tube, the bottom seal extending from the first side edge to the second side edge, a machine direction of the collapsed tube extending in a direction generally perpendicular to the bottom seal, the first panel having a first top edge opposite the bottom edge and the second panel having a second top edge opposite the bottom edge, the first top edge and second top edge defining an opening of the bag, a distal end of both the first top edge and second top edge having a wave-shaped profile, the wave-shaped profile defining a plurality of lobes, a plurality of ribs defined in a first stretched region below the plurality of lobes, the plurality of ribs generally parallel to each other, each one of the plurality of ribs extending from the first side edge towards the second side edge, the plurality of ribs comprising a plurality of thick and thin ribs, and a first un-stretched region above the first stretched region devoid of ribs and a second un-stretched region below the first stretched region devoid of ribs.