A method and a device for forming weakened areas in blanks for containers.

摘要

A method and a device for selective weakening of limited areas of a material intended for the production of containers for liquids, especially beverages, with a material for the containers that is built up of a number of layers (l-5) at least one of which is a metal film layer (4). A hole (11) defined as to dimensions and depth is melted from the outside by the aid of a laser beam (7) hitting said layers (l-5) with such an intensity and during such a period of time that only the desired thickness of layers (l-3) is melted through.