| 摘要 |
The disclosure relates to a method of producing packages with opening arrangements and of the type which has a hole prepared in the package wall through which the package is intended to be emptied of its contents. A web of paper or paperboard is coated on its one side with liquid tight coating of plastic and, on its other side, with a metal foil which serves as oxygen gas barrier and which is bonded to the paper or paperboard layer by an adjacent adhesive layer. The coated web or packaging blank is thereafter transported further to a packing and filling machine where the web is provided with emptying-preparatory holes before being reformed into finished packages in a conventional manner. The emptying-preparatory holes are made only partly through the web in that the web is first incised or cut along closed lines through the outer plastic coating and the paper or paperboard web down to, but not through, the subjacent metal layer, and the parts of the web enclosed by the incision lines being thereafter removed from the web with the aid of a vacuum. The removal of the above-mentioned web parts is facilitated in that the packaging blank is selectively heated in order wholly or at least party to break the bond between the metal foil and the paper or paperboard layer within the region of these parts. |
