Method for forgery-proof labeling of items, and forgery-proof label
Assigneenovember Aktiengesellschaft Gesellschaft fur Molekulare Medizin
InventorsGeorg Bauer, Jörg Hassmann, Harald Walter, Wolf Bertling
Life of this patent
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Abstract
The invention relates to a method for forgery-proof labeling of items, such as credit cards, bank notes and the like, comprising the following steps: (a) applying, to a first layer (1) that reflects electromagnetic waves, an inert second layer (3) that is permeable to electromagnetic waves, said second layer having a predetermined thickness, (b) applying, to said second layer (3), a third layer (4) that is formed by metal clusters, and (c) linking the first layer (1) of the label so produced with the item.
Claims21
A method for forgery-proof marking of objects, comprising
- a) applying an inert second layer (3) to a first layer (1), wherein said first layer (1) reflects electromagnetic waves, wherein said second layer (3) has a predetermined thickness, is transmissive for electromagnetic waves, and is made from a polymer selected from the group consisting of a polycarbonate (PC), a polyethylene (PE), a polypropylene (PP), a polyurethane (PU), a polyimide (PI), a polystyrene (PS), or a polymethacrylate (PMA);
- b) applying a third layer (4) to said second layer (3) to thereby generate a label, wherein said third layer (4) is formed from metallic clusters, wherein, due to an interaction of light reflected from the first layer (1) with the third layer (3), the label appears colored, the color depending upon the angle of incidence or angle of observation;
- and
- c) connecting said label to said object.
A method for forgery-proof marking of objects, comprising:
- (a) applying an inert second layer (3) to a first layer (1), wherein said second layer (3) has a predetermined thickness, is transmissive for electromagnetic waves, and is made from a polymer selected from the group consisting of a polycarbonate (PC), a polyethylene (PE), a polypropylene (PP), a polyurethane (PU), a polyimide (PI), a polystyrene (PS), or a polymethacrylate (PMA), wherein said first layer (1) reflects electromagnetic waves;
- (b) connecting said first layer (1) to said object, thereby generating a label;
- and
- (c) applying a third layer (4) to a substrate (6), wherein said third layer (4) is formed from metallic clusters, wherein said third layer (4) is affanged at a predetermined distance from said first layer (1) such that said label becomes visible in a way that, due to an interaction of light reflected from the first layer with the third layer (3), the label appears colored, the color depending on the angle of incidence or angle of observation.
Dependencies are inferred from the claim text.