Patent ID: 8470117
Filing Date: 2013-06-25
Classification: B31B,B32B,B65D,Y10T

Abstract:
1. Method of manufacture for a packaging film, comprising the following process steps: supplying a film web along a running direction and producing a first material weakening defining a pull tab in the film web at a pull tab position, and supplying a pour-hole film strip, which pour-hole film strip has at least a three-layer structure, wherein the at least three-layer structure defines at least one pour hole and wherein the at least three-layer structure comprises a film strip sealing layer and an adhesive layer situated adjacent to the film strip sealing layer, and a carrier film layer situated adjacent to the adhesive layer on the side of the adhesive layer facing away from the film strip sealing layer, wherein the film strip sealing layer realizes a predetermined breaking layer, which is constituted in such a manner that under the action of a tensile force on a separating region of this predetermined breaking layer at least partially surrounding the pour hole, a break propagates along an edge of the separating region in the predetermined breaking layer and attaching the pour-hole film strip with the film strip sealing layer to that side of the film web, which, when the packaging film is used to form a packaging, forms a film inner side of the packaging so that said action of tensile force can be transmitted via the pull tab to the separating region and said separating region and the adjoining region of the adhesive layer form a reclosure cooperating with the pull tab.