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1. 发明授权

US4455039A Encoded security document 失效
标题翻译：编码安全文件
公开(公告)号：US4455039A
公开(公告)日：1984-06-19
申请号：US391690
申请日：1982-06-24
申请人： Edward H. Weitzen , Salvatore F. D'Amato , Robert M. Fleming , Manfred R. Kuehnle , C. Frederick Ekman , Jurgen Kruse , Harold J. Weber
发明人： Edward H. Weitzen , Salvatore F. D'Amato , Robert M. Fleming , Manfred R. Kuehnle , C. Frederick Ekman , Jurgen Kruse , Harold J. Weber
IPC分类号： B41M3/14 , G06K19/10 , G07D7/20 , G07F7/08 , B42D15/00
CPC分类号： B41M3/14 , G06K19/10 , G07D7/20 , G07F7/086 , Y10S283/901 , Y10S283/904
摘要： Documents are encoded with at least one thin, transparent coating, normally invisible, but having a readily detectable physical characteristic such as, electrical conductivity, electrical impedance, electrical capacitance, electroluminescence. Each document consists of a substrate on which is applied (1) at least one of the thin coatings, and (2) conventional printing, preferably intaglio. The thin coating may be applied before or after the printing. The coating includes particles driven into the surface to a substantial depth. The uncoated substrate is free of the detectable physical characteristic. The coating is confined to a limited area of the substrate surface and itself constitutes a code or is laid down in a pattern for identification. A second coating can be applied so that all areas of the surface have the same appearance to mask visual detection of the first coating. The first coating can be of such a nature as to defeat electrostatic copying, particular, color copying, by effecting a discernible difference between the original and the copy. Each coded coating is detectable by a machine which is capable of quickly distinguishing a genuine document from a counterfeit document.
摘要翻译：文件用至少一个薄的透明涂层编码，通常是不可见的，但具有容易检测的物理特征，例如导电性，电阻抗，电容，电致发光。每个文件由其上施加有（1）至少一个薄涂层的基底组成，和（2）常规印刷，优选凹版。可以在印刷之前或之后涂布薄涂层。涂层包括驱动到表面中的颗粒到相当大的深度。未涂覆的基底没有可检测的物理特性。涂层被限制在衬底表面的有限区域，并且其本身构成一个代码或者被放置在用于识别的图案中。可以施加第二涂层，使得表面的所有区域具有相同的外观以掩盖第一涂层的视觉检测。第一涂层可以具有通过实现原稿和复印件之间的可辨别的差异来打败静电复印，特别是彩色复印的性质。每个编码的涂层可以通过能够快速区分真实文件与假冒文件的机器来检测。

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