发明名称 |
DATA CARRIER WITH A LIQUID CRYSTAL SECURITY ELEMENT |
摘要 |
Data carriers protected against forgery attempts using colour copiers, such as an identity card or a security, which include an optically variable security element of a liquid crystal material. This security element, such as for example a security thread, has a layer similar to plastic of a liquid crystal polymer, which exhibits a pronounced iridescence at room temperature. The plastic-like properties of the liquid crystal polymers permit easy processing to form a semi-finished or finished product, so that very diverse types of security elements can be produced. <IMAGE> |
申请公布号 |
EP0435029(A3) |
申请公布日期 |
1991.09.18 |
申请号 |
EP19900123341 |
申请日期 |
1990.12.05 |
申请人 |
GAO GESELLSCHAFT FUER AUTOMATION UND ORGANISATION MBH |
发明人 |
HECKENKAMP, CHRISTOPH;SCHWENK, GERHARD;MOLL, JUERGEN |
分类号 |
B42D25/00;B42D25/355;B44F1/02;G07F7/08 |
主分类号 |
B42D25/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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