Patent ID: 9272459
Filing Date: 2016-03-01
CPC Classification: B29C,B29L,B65F

Claim Text:
1. A thermoplastic bag comprising: a first sidewall of pliable thermoplastic material; a second sidewall of pliable thermoplastic material overlaid and joined to the first sidewall along a first side edge, a second side edge, and a bottom edge extending between the first and second side edges to provide an interior volume, the interior volume accessible via an opening provided by un-joined first and second top edges of the respective first and second sidewalls; wherein the first sidewall includes a first section having no ribs, and a second section having a plurality of first ribs parallel to one another and a plurality of second ribs parallel to one another wherein: wherein the second section provides both increased stretching and decreased thickness compared to the first section; and the first ribs and the second ribs are formed by passing the first and second sidewalls through a single pair of intermeshing rollers having a roller with a plurality of teeth that each include both a first plurality of first ring rolling elements that create the first ribs and a second plurality of SELFing elements that create the second ribs.