Patent ID: 6336666
Filing Date: 2002-01-08
Classification: B41M,B42D,Y10S

Abstract:
A method producing a film (7a, 7b) with an outer surface (8) made of synthetic material, the outer surface having a symbol or pattern non-reproducible by optical scanning, comprising the steps of:selecting a support sheet (1) with a non-glossy surface (2) on which the synthetic material of the outer surface (8) of the film will not adhere; producing on the non-glossy surface (2) a first discontinuous imprint (3) by use of a printing composition that after hardening or drying forms a varnish (3) adhering to the non-glossy surface (2), the varnish (3) having a surface condition more glossy than that of the non-glossy surface (2); producing on the first imprint (3), a second continuous imprint of a printing composition that after hardening or drying forms a synthetic material layer (5) having one surface in contact with the non-glossy surface (2) and the varnish (3); and completing production of the film on the synthetic material layer (5), wherein, the one surface of the synthetic material layer (5) in contact with the non-glossy surface (2) and the varnish (3) constitutes the outer surface (8) of the film (7a, 7b) which will not adhere to the non-glossy surface (2) of the support sheet (1), the synthenic material layer (5) adheres to the varnish (3) less strongly than the varnish (3) itself adheres to the non-glossy surface (2) of the support sheet (1), the synthetic material layer (5) is separable, at the outer surface (8) of the film, from the support sheet (1) with the varnish (3) remaining attached on the support sheet (1), upon separation of the outer surface (8) of the film from the support sheet, first portions of the outer surface (8) of the film having previously been in contact with the varnish having a more glossy finish than second portions of the outer surface of the film not having previously been in contact with the varnish, and the first portions of the outer surface of the film form a viewable symbol or pattern preventing reproduction therethrough by optical scanning.