Patent ID: 8790230

Claim:
A method of forming a bag having a bottom wall, opposing front and rear walls and two sidewalls, the method comprising the steps of: a) providing two adjacent webs of material, the adjacent webs continuously formed with one another and folded along one edge, defining a fold line, two parallel web extending from the fold line with two projected ends positioned opposite the fold line; b) moving the webs in a forming direction that is transverse to their direction of extension from the fold line; c) providing an inwardly directed bottom gusset fold along the fold line, such that the fold line is positioned between the web layers, wherein the bottom gusset fold defines a bottom edge of the bag; d) joining the web layers along a first seal line transverse to the inwardly directed bottom gusset fold and transverse to the forming direction, the first seal line extending inwardly from the bottom edge; e) joining the web layers along a second seal line transverse to the inwardly directed bottom gusset fold, the second seal line extending inwardly from the bottom edge, and the second seal line spaced from and parallel to the first seal line; f) separating a portion of the web material defined between the first seal line and the second seal line; g) forming an inwardly directed side gusset fold along both the first and second seal lines, such that the inwardly directed side gusset folds are positioned between the web layers and transverse to the bottom gusset fold, the side gusset folds defining sidewalls for and extending from the bottom edge of the bag; and h) the forming of the side gusset folds and the inwardly directed bottom gusset fold combining to form a pair of folded triangular base portions, the folded triangular base portions continuously formed with and connected to the inwardly directed bottom gusset fold, each folded triangular base portion extending upwardly from the bottom gusset fold and one folded triangular base portion positioned adjacent each of the inwardly directed side gusset folds, the folded triangular base portions sealed along their height to the adjacent first and second seal lines and positioned inwardly of the side walls and the seal lines.