Security element with flip-flop color change effect and...

Details Security element with flip-flop color change effect and... Security element with flip-flop color change effect and...

2006-08-01

2006-08-01

Assaf, Fayez G. (Department: 2872)

Optical: systems and elements

Light interference

Produced by coating or lamina

C359S577000, C359S584000, C359S587000, C359S002000, C359S580000

Reexamination Certificate

active

07085058

ABSTRACT:
A security element (1) for application or embedding in objects (300), in particular for documents of value such as bank notes, credit cards and the like, is structured in a multi-layer fashion and has an interference element I, which produces a color shift effect, a layer M with magnetic properties and a reflection layer R, which is located between interference element I and magnetic layer M. Designs of the invention pro-vide a negative writing20and/or coding11in reflection layer R and magnetic layer M. According to a further design diffraction structures2are integrated in the security element1. Such a security element in particular is suitable as window security thread200in bank notes.

REFERENCES:
patent: 4705300 (1987-11-01), Berning et al.
patent: 2005/0123755 (2005-06-01), Argoitia et al.
patent: 0 341 002 (1989-11-01), None
patent: 0 756 945 (1997-02-01), None
patent: WO01 03945 (2001-01-01), None

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