NZ334742A - Free standing bag or pack having a gusseted base having side portions sealed to each other - Google Patents

Abstract

A method of making a self-standing bag comprising: (a) Taking a longitudinal sheet of film having two parallel longitudinal edges and having a first major surface and a second major surface, (b) Reducing the width (edge to edge) of the longitudinal sheet by creating with five folds a longitudinally extending pleat in the sheet material, the five folds providing a pleat being deployable to resemble the letter "M", (viz. the "M" being provided by (i) a first base region fold, (ii) a first apex fold, (iii) a base fold, (iv) a second apex fold, and (v) a second base region fold, (c) (Optionally) longitudinally sealing together the facing surfaces of the first major surface at or adjacent the first and second apex folds of the pleat, (d) (Optionally) transverse sealing together at substantially bag width intervals, each of the facing surfaces of the first major surface from the apex folds or at least towards the base region folds of the pleat, (e) Forming the pleated sheet material into a tube by bringing together the first major surface of the film at or immediately adjacent the parallel longitudinal edges of the film, (f) Transverse sealing the first major surface of the film together transversely across the leading end of the tube to form what will be one closed side of the bag in its upright self standing condition, and (g) Transverse sealing the first major surface of the film of the tube together a bag width distance from the leading end of the tube, to form what will be the other closed side of the bag in its upright self standing condition, the transverse sealing including or being followed by, severing the tube a bag width from the leading end to form a discrete bag.