发明授权
US5509691A Security element in the form of threads or strips to be embedded in
security documents and a method for producing and testing the same
失效
安全元素以线程或条形式嵌入安全文档中，以及用于生成和测试安全文档的方法
- 专利标题： Security element in the form of threads or strips to be embedded in security documents and a method for producing and testing the same
- 专利标题（中）： 安全元素以线程或条形式嵌入安全文档中，以及用于生成和测试安全文档的方法
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申请号： US192610申请日： 1994-02-07
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公开(公告)号： US5509691A公开(公告)日： 1996-04-23
- 发明人: Wittich Kaule , Wilhelm Ilgmann , Gerhard Schwenk , Gerhard Stenzel
- 申请人： Wittich Kaule , Wilhelm Ilgmann , Gerhard Schwenk , Gerhard Stenzel
- 申请人地址： DEX
- 专利权人： GAO Gesellschaft fur Automation und Organisation mbH
- 当前专利权人： GAO Gesellschaft fur Automation und Organisation mbH
- 当前专利权人地址： DEX
- 主分类号： B32B27/00
- IPC分类号： B32B27/00 ; B42D15/00 ; D21H21/42 ; G07D7/02 ; G07D7/04 ; G07D7/20
摘要：
A security element that can be embedded in the form of a thread or strip in a security document, in particular a paper of value, is composed of two carrier sheets, each of which bears each of the marking substances allowing for detection of authenticity. The two carrier sheets are put together in such a way that the marking substances to be protected from mechanical abrasion and other external influences come to lie on the inside.The thread not only offers special protection for the marking substances, but can also be embedded in the paper substance easily due to its symmetrical structure and without showing any tendency to curl.
公开/授权文献
- US4896719A Isothermal panel and plenum 公开/授权日：1990-01-30
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