Patent ID: 7740730

Claim:
A method of closing a container with a lid, the method which comprises the following steps: forming the lid entirely without weakening lines from a composite assembly having only two continuous assembly layers without weakening lines and an opening aid in an opening aid region, the two assembly layers including an assembly layer facing the container and an assembly layer facing away from the container; bonding the composite assembly to the container as the lid provided entirely without weakening lines; the assembly layer facing the container sealing against a container edge and forming a removal opening produced by separating the assembly layers for removal of package contents located in the container; the assembly layer facing the container having an assembly adhesion to the assembly layer facing away from the container provided without a bonding agent between the assembly layers; producing the assembly layer facing the container mainly of a plastic having an intrinsic tearing resistance that is lower in a removal opening lid region than the assembly adhesion to the assembly layer facing away from the container in the remaining lid region; and producing the assembly layer facing the container with an assembly adhesion to the container edge greater at least in the opening aid region than the assembly adhesion to the assembly layer facing away from the container; and subjecting the composite assembly formed of the assembly layers of the lid without weakening lines to increased pressure and increased temperature with sealing tools in the form of rollers, one of said rollers having raised surface portions corresponding to a predetermined region for the removal opening having increased assembly adhesion adjusted to lie in a range from 5 N to 160 N/15 mm and portions which are not raised corresponding to regions outside the removal opening having assembly adhesion adjusted to lie in a range from 0.1 to 5 N/15 mm.