Patent ID: 7465265

Claim:
A method for providing a gusseted bag made of a laminated material with a closure comprising a folded web of thermoplastic material, said laminated material comprising an interior layer of thermoplastic material and a non-interior layer of non-thermoplastic material, said method comprising the following steps: (a) slitting the gusseted bag along first and second lines so that a top marginal portion of one wall of the bag disposed between said first and second lines forms a flap; (b) arranging the top of the gusseted bag so that the topmost portions of the gussets on each side are not expanded and the flap does not cover the topmost portions of a respective gusset panel of a respective gusset or the topmost portion of the other wall disposed between said respective gusset panels; (c) joining one leg of said folded web of thermoplastic material to said inner layer of thermoplastic material of at least respective portions of the topmost portions of said respective gusset panels and said other wall exposed by step (b); and (d) joining said inner layer of thermoplastic material of a portion of said flap to the other leg of said web of thermoplastic material after steps (a)-(c) have been performed.