Patent ID: 6216424
Filing Date: 2001-04-17
Classification: B65D

Abstract:
A method for producing a self-supporting bag, comprising:placing a front material and a back material, each comprising a flexible film composite having a seal layer, so that the seal layers face each other;placing a straw-thrusting film, comprising a flexible film composite having a seal layer, between the front material and the back material at a top end thereof, folded in half in the form of a letter V, so that the seal layer of the straw-thrusting film faces outward;heat-welding the straw-thrusting film composite to either the front material or the back material in a length which is less than the height of the straw-thrusting film folded in half,placing a bottom material comprising a film composite having a seal layer between the front material and the back material, folded in half in the form of an inverted letter V, so that the seal layer faces outside,sealing the bottom material to the front material and the back material, andsealing the front material to the back material at a first and a second longitudinal sides thereof, to form the self-supporting bag.