Film stack for the production of security documents such as identity cards, passport cards and credit cards, comprises first- and second film, where the first film has recesses in the film stack for receiving the positioning pins

摘要

The film stack (1) comprises first- (2, 2') and second film (3, 3', 3'', 3''', 3''''), where the first film has recesses (5) in the film stack for receiving the positioning pins, which serve for positioning the films during the lamination and the second film does not extend itself in the areas (7), which overlap with the recesses in the first film and are present within the film stack. Each of the areas adjoins at the second film over a respective edge distanced to the recesses within the film stack. The distance of the edges of the areas to the recesses is 2 mm. The film stack (1) comprises first- (2, 2') and second film (3, 3', 3'', 3''', 3''''), where the first film has recesses (5) in the film stack for receiving the positioning pins, which serve for positioning the films during the lamination and the second film does not extend itself in the areas (7), which overlap with the recesses in the first film and are present within the film stack. Each of the areas adjoins at the second film over a respective edge distanced to the recesses within the film stack. The distance of the edges of the areas to the recesses is 2 mm, and is selected independent of the flow rate of the films during the lamination, so that the films do not adhere with the positioning pins during the lamination process. The recesses and the areas, in which the second film does not extend, are circular. A part of the areas extends over a side edge of the films. The part of the areas and the recesses are concentrically arranged to each other. An independent claim is included for a method for laminating films.