Security element with flip-flop color change effect and magnetic properties, article compromising such a security element and method for producing said security element and said article
US7085058B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 17, 2003 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | Jan 17, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2270/23
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
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 writing 20 and/or coding 11 in reflection layer R and magnetic layer M. According to a further design diffraction structures 2 are integrated in the security element 1. Such a security element in particular is suitable as window security thread 200 in bank notes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.