Optically variable security element having reflective surface region

US11623465B2 · kind B2 · utility

Assignee

• GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH · DE

Inventors

• Kai Hermann Scherer · Munich, DE
• Maik Rudolf Johann SCHERER · Grainau, DE
• Raphael Dehmel · Neubeuern, DE
• Michael Rahm · Bad Tölz, DE
• Giselher Dorff · Holzkirchen, DE
• Andreas Rauch · Ohlstadt, DE
• Christian Fuhse · Otterfing, DE
• Tobias Sattler · Holzkirchen, DE

Key dates

• Filing date: Jul 9, 2019
• Grant date: Apr 11, 2023
• Expiry date: Jul 9, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B42D25/445
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

An optically variable security element wherein the areal expansion whereof defines a z direction standing perpendicularly thereon, and has a multicolored, reflective areal region. The areal region includes two relief structures arranged at different height levels in the z direction. The relief structures are each supplied with an ink coating which produce a different color impression. The ink coating of the relief structure disposed at a higher level is configured in the feature region as a regular or irregular grid with grid elements and grid spaces. The dimensions of the grid elements and/or grid spaces are below 140 μm at least in one direction, so that, in the feature region, for a viewer from at least one viewing angle, the ink coating of the relief structure disposed at a lower level is visible through the grid spaces of the ink coating of the relief structure disposed at a higher level.