EP 3356158 A1 20180808 - METHOD FOR PRODUCING A SECURITY ELEMENT
Title (en)
METHOD FOR PRODUCING A SECURITY ELEMENT
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES SICHERHEITSELEMENTS
Title (fr)
PROCÉDÉ POUR LA PRODUCTION D'UN ÉLÉMENT DE SÉCURITÉ
Publication
Application
Priority
- EP 15188216 A 20151002
- EP 2016073582 W 20161003
Abstract (en)
[origin: WO2017055634A1] The invention relates to a method (100) for producing a security element (1) with a metallized optical diffraction structure (8) in an imprinted coating layer (3). A coating layer (3) is applied onto a support (2), and the layer is imprinted and cured. By means of the imprinting process of the coating layer (3), structural depressions (6), structural elevations (7), and an optical diffraction structure (8) are produced. A reflective layer (9, 9') is subsequently provided on the structural depressions (6) and the structural elevations (7) of the imprinted coating layer (3) by means of a metallization process, and the reflective layer (9, 9') is then selectively demetallized. The aim of the invention is to provide a simple and reliable method for producing a security element. According to the invention, this is achieved in that the optical diffraction structure (8) is imprinted on at least one structural elevation (7), and the selective demetallization process includes a step of connecting at least the metallized structural elevation (7) which has the optical diffraction structure (8) to a transfer support (11) and a subsequent step of separating the structural elevation (7) connected to a transfer support (11) both from the support (2) as well as from at least one metallized structural depression (6) adjoining the structural elevation (7) by removing the transfer support (11) from the support (2).
IPC 8 full level
B42D 25/425 (2014.01); B32B 38/06 (2006.01); B42D 25/328 (2014.01); B42D 25/373 (2014.01); B42D 25/45 (2014.01)
CPC (source: EP US)
B42D 25/29 (2014.10 - US); B42D 25/328 (2014.10 - EP US); B42D 25/373 (2014.10 - EP US); B42D 25/425 (2014.10 - EP US); B42D 25/435 (2014.10 - US); B42D 25/45 (2014.10 - EP US)
Citation (search report)
See references of WO 2017055634A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3150400 A1 20170405; EP 3356158 A1 20180808; EP 3356158 B1 20190814; JP 2018533758 A 20181115; JP 7025323 B2 20220224; US 10618339 B2 20200414; US 2018304670 A1 20181025; WO 2017055634 A1 20170406
DOCDB simple family (application)
EP 15188216 A 20151002; EP 16787740 A 20161003; EP 2016073582 W 20161003; JP 2018517259 A 20161003; US 201615765366 A 20161003