Method for producing a security element
US10618339B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2016 |
| Grant date | Apr 14, 2020 |
| Priority date | — |
| Expiry date | Oct 3, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/45
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method for producing a security element with a metallized optical diffraction structure in an embossed coating layer in which a coating layer is applied onto a support, then embossed and cured; structural depressions, structural elevations, and an optical diffraction structure are produced by embossing the coating layer, then a reflective layer is provided on the structural depressions and structural elevations of the embossed coating layer by means of metallization, and after that, this reflective layer is selectively demetallized. The optical diffraction structure is embossed into at least one structural elevation and the selective demetallization includes a bonding of at least the metallized structural elevation that has the optical diffraction structure to a transfer support and then a separation of this structural elevation bonded to a transfer support both from the support and from at least one metallized structural depression adjoining this structural elevation through removal of the transfer support from the support.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.