发明授权
US4756557A Security document having a security thread embedded therein and methods
for producing and testing the authenticity of the security document
失效
具有嵌入其中的安全线程的安全文档和用于生成和测试安全文档的真实性的方法
- 专利标题： Security document having a security thread embedded therein and methods for producing and testing the authenticity of the security document
- 专利标题（中）： 具有嵌入其中的安全线程的安全文档和用于生成和测试安全文档的真实性的方法
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申请号： US812894申请日： 1985-12-23
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公开(公告)号： US4756557A公开(公告)日： 1988-07-12
- 发明人: Wittich Kaule , Gerhard Stenzel , Jurgen Moll , Gerhard Schwenk
- 申请人： Wittich Kaule , Gerhard Stenzel , Jurgen Moll , Gerhard Schwenk
- 申请人地址： DEX
- 专利权人： G.A.O. Gesellschaft fuer Automation und Organisation mbH
- 当前专利权人： G.A.O. Gesellschaft fuer Automation und Organisation mbH
- 当前专利权人地址： DEX
- 优先权： DEX3446861 19841221
- 主分类号： B43L13/00
- IPC分类号： B43L13/00 ; B41M3/14 ; B42D15/00 ; B42D25/355 ; D21H21/48 ; G06K19/10 ; G06T1/00 ; G07D7/12 ; G07D7/121
摘要：
In order to increase the protection of security documents such as ban notes, etc., against forgery, security threads are embedded in the document which have at least two areas extending in the longitudinal direction of the thread and differing in their physical properties. The thread is preferably a coextruded multicomponent synthetic thread whose individual components contain additives such as dyes or fluorescent substances and/or particles having electrical or magnetic properties. The testing of the authenticity of the security thread is directed toward the presence of these additives and their mutual geometrical distribution in certain areas of the security thread.
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