US 12,269,289 B2
Security feature for a value document, value document and method of producing a security feature
Cristina Fabian, Garching (DE); Klaus Kohl, Miesbach (DE); and Gunter Endres, Passau (DE)
Assigned to GIESECKE+DEVRIENT EPAYMENTS GMBH, Munich (DE)
Appl. No. 18/556,852
Filed by GIESECKE+DEVRIENT EPAYMENTS GMBH, Munich (DE)
PCT Filed Apr. 26, 2022, PCT No. PCT/EP2022/025181
§ 371(c)(1), (2) Date Oct. 23, 2023,
PCT Pub. No. WO2022/228729, PCT Pub. Date Nov. 3, 2022.
Claims priority of application No. 10 2021 002 214.9 (DE), filed on Apr. 27, 2021.
Prior Publication US 2024/0217260 A1, Jul. 4, 2024
Int. Cl. B42D 25/41 (2014.01); B42D 25/23 (2014.01); B42D 25/309 (2014.01); B42D 25/351 (2014.01)
CPC B42D 25/41 (2014.10) [B42D 25/23 (2014.10); B42D 25/309 (2014.10); B42D 25/351 (2014.10)] 11 Claims
OG exemplary drawing
 
1. A security feature, into which identifiers are introduced by at least one laser beam, for a value document, the security feature comprising:
at least one laser-sensitive recording layer in a visible spectral range,
light-diffracting or light-refracting structures arranged on a first side of the recording layer,
at least one first identifier which is introduced into the at least one recording layer by means of a laser beam from at least one direction through the light-diffracting or light-refracting structures and can be recognized from a same direction and from a second side of the recording layer,
at least one second identifier which is introduced by a laser beam from the second side of the recording layer into the at least one recording layer and can be recognized when viewed from the first and second sides of the recording layer;
wherein a luminescent substance is introduced between the first identifier and the second identifier.