Abstract: Containers are produced from a sheet of flexible material having a thermally bondable inside surface. In one embodiment the material is formed into a T-shaped intermediate structure having two pleats (302 and 303) having a uncreased, mutual central portion (300). The intermediate structure also has two overlapping side wall portions (295) extending from the pleats.

Abstract: A method of making a container (10) having a unitary spout pull tab from a continuous sheet of flexible material (11) comprises the steps of folding the sheet to form two opposite side walls (23) joined at a bottom end by a bottom wall (20) and open at a top end opposite the bottom wall. Elongated portions of the two side walls are sealed together along their side edges to form two side seals (27) at least one of which includes a tab portion (12). Two breachably sealed V-folds (33, 34) are formed in the side walls adjacent the top end straddling the tab portion of the one side seal. Upon manually pulling the tab portion of the one side seal, the breachable seals of the V-folds straddling the tab portion of the one side seal may be broken and the two V-folds pulled outwardly to collectively form an open spout (S).

Abstract: A container 10 and method of making the same preferably from a single web of flexible material wherein the method comprises placing a V-fold, or modified flat V-fold, in a sheet of such material, creating two subsections whose V-fold members (58, 60) are attached to the respective subsections preferably along a longitudinal fold line. First and second side edge weld lines (100, a,b) are made thereby connecting the respective subsections to their own V-fold members (58, 60) as well as those of the opposite subsections. Oblique weld lines (86, 88) then interconnect the point of intersection of the side edge weld lines (66,76) and longitudinal fold line. The bottom wall (2) is formed by folding the legs (80, 82) inwardly with the endmost portions of which pivoting along a lateral axis of the bottom wall (2) upwardly towards the first and second side edge weld line (100, a,b) thereby reinforcing the stress-bearing bottom.

Abstract: A method is disclosed for constructing a flexible container (10) with a tubular fitment (13). The method includes placing the fitment upon a mandrel (22), positioning the mandrel supported fitment between the unsealed sides (25, 26) of the container, sealing the top edge (28) of the sides about a base portion (18) of the fitment and fully withdrawing the mandrel from the fitment and from between the sides so that the side edges (29) and top edge of the sides may be sealed to form a completed container.

Abstract: Containers are produced from a sheet of flexible material having a thermally bondable inside surface. In one embodiment flaps are formed and folded outwardly to form two windows in the sheet. Pleats are formed and bonded to transverse the windows so that a pleat ply closes the windows. The pleats are folded to bring the flaps against the window closing pleat plies and bonded. In another emobdiment holes are cut in the sheet located in one ply of the pleats.

Abstract: A container and method of making the same preferably from a single web of flexible material wherein the method comprises placing a V-fold, or modified flat V-fold, in a sheet of such material, creating two subsections whose V-fold members are attached to the respective subsections preferably along a longitudinal fold line. First and second side edge weld lines are made thereby connecting the respective subsections to their own V-fold members as well as those of the opposite subsections. Oblique weld lines then interconnect the point of intersection of the side edge weld lines and longitudinal fold line. The bottom wall is formed by folding the legs inwardly with the endmost portions of which pivoting along a lateral axis of the bottom wall upwardly towards the first and second side edge weld line thereby reinforcing the stress-bearing bottom.