Security element and method for manufacturing the same

US8534710B2 · kind B2 · utility

Assignee

• GIESECKE & DEVRIENT GMBH · DE

Inventors

• Winfried Hoffmuller · Bad Tölz, DE
• Marius Dichtl · Munich, DE
• Stefan Bichlmeier · Unterhaching, DE
• Lars Hoffmann · Birkenfeld, DE
• Manfred Heim · Munich, DE

Key dates

• Filing date: Jul 2, 2009
• Grant date: Sep 17, 2013
• Expiry date: Jan 8, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G03H2250/41
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

A security element for securing valuable articles comprises an optically variable layer (18) that conveys different color impressions at different viewing angles, and a color-constant layer (17, 24). The optically variable layer (18) and the color-constant layer (17, 24) are stacked in a covering region (20), while at most one of the optically variable layer (18) and the color-constant layer (17, 24) is present outside (22) the covering region. The color impression of the stacked layers (18, 17, 24) in the covering region (20) and the color impression of the one layer (18) outside (22) the covering region are matched with each other when viewed at a predetermined viewing angle. Further, the color-constant layer comprises an ink layer (17) and a metal layer arranged below the ink layer (24).