Safety marking
AssigneeKoenig & Bauer Aktiengesellschaft
InventorJürgen Veil
Life of this patent
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Abstract
A safety marking and a method for producing a safety marking according to the CIT principle for printed areas are provided. The safety marking is a two-dimensional or three-dimensional image, the image elements of which are coded in a size and arrangement, which cannot be perceived by the human eye and are visible only with the help of optical decoders. A printable safety marking is created according to the CIT principle, which can be implemented at little expense at any place of a material being printed and therefore also in areas that are not rastered. This is accomplished by a coding of the image elements by locally different reflection properties of a lacquer coating formed from at least two different lacquer layers, the coding being independent of the chrominance and tonal value of the printed area.
Claims11
A safety marking for printed surfaces, the safety marking being a two-dimensional or three-dimensional image, the image elements of which are coated in a size and arrangement that is below the resolving capability of the naked human eye and visible only with the help of an optical decoder lens, characterized by the coding of the image elements by locally different reflection properties of a lacquer coating formed from at least two different lacquer layers, the coding being independent of the chrominance and tonal value of the printed area.
A method for the preparation of safety markings for printable surfaces, the safety marking being two-dimensional or three-dimensional image, the image elements of which are coded in a size and arrangement that is below the resolving capability of the naked human eye and visible only with the help of an optical decoder lens, characterized by:
- the preparation of a lacquer printing forme containing the coded arrangement of image elements of the safety marking,
- the application of a first and a second lacquer layer on the surface, which is to be characterized with the safety marking, one of the lacquer layers containing the coded arrangement of the image elements of the safety marking and being applied in a printing unit with the lacquer printing forme and the other lacquer layer being applied two-dimensionally,
- the lacquer layers themselves having different reflection properties or, due to their interaction or due to the interaction of one of the lacquer layers with a further lacquer layer, developing locally different reflection properties at the interfaces.
Dependencies are inferred from the claim text.