Patent ID: 9073281
Filing Date: 2015-07-07
Classification: B31B,B65D

Abstract:
1. A method of making a stepped end on a tube of flexible material, comprising: slitting the tube adjacent an open end of the tube to provide first slits beside a first panel of the tube and to provide second slits beside a second panel of the tube; trimming the first panel to a first shortened length adjacent to the open end of the tube while the first slits separate the first panel from a remainder of the tube, wherein the remainder of the tube comprises side gussets and the second panel; trimming each of side gussets to a second shortened length adjacent to the open end of the tube while the second slits separate each of the side gussets from the second panel, wherein the second shortened length is longer than the first panel and shorter than the second panel; and applying adhesive material on the tube wherein the tube is adapted to be folded along a fold line of the tube, which folds the first panel upon itself with the adhesive material therebetween, and the adhesive material is adapted to form an adhesive bond and an adhesive seal to a portion of the first panel and the side gussets and the second panel, and provide a closed stepped end for a bag.