Optically variable security threads and stripes

US9701152B2 · kind B2 · utility

Assignees

• SICPA HOLDING SA · CH
• China Banknote Printing and Minting Corp. · CN
• Zhongchao Special Security Technology Co., Ltd · CN
• CHINA BANKNOTE SICPA SECURITY INK CO., LTD. · CN

Inventors

• Gebhard Ritter · Ingelheim am Rhein, DE
• Pierre Degott · Crissier, CH
• Zhongdong Ye · Beijing, CN
• Fangyi Sun · Beijing, CN
• Weiru Wang · Beijing, CN
• Chunhua Hu · Jiaocheng District, CN
• Xiang Li · Shanghai, CN

Key dates

• Filing date: Aug 29, 2012
• Grant date: Jul 11, 2017
• Expiry date: May 8, 2033

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B42D25/00
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

Security threads or stripes include a substrate and i) a first optically variable layer imparting a first different color impression at different viewing angles, ii) a second optically variable layer imparting a second different color impression at different viewing angles, iii) a first color constant layer having a color matching the color impression of the first or second optically variable layer at a first viewing angle, iv) a second color constant layer having a color matching the color impression of the first or second optically variable layer at a second viewing angle, and v) one or more material-free regions, wherein the first optically variable layer, the second optically variable layer, the first color constant layer, the second color constant layer and the one or more material-free regions are jointly visible from one side of the security thread or stripe.