Method and apparatus for discriminating printings
    82.
    发明授权
    Method and apparatus for discriminating printings 失效
    识别印刷品的方法和装置

    公开(公告)号:US5508520A

    公开(公告)日:1996-04-16

    申请号:US233344

    申请日:1994-04-26

    CPC分类号: G03G15/5062 G03G21/04

    摘要: In a method and an apparatus for discriminating real securities from copies thereof produced by an electrophotographic copier using a toner, a heating member heated to a temperature above 50.degree. C. and below 250.degree. C. is brought into contact with a printing to see if an image on the printing changes or if any deposit is present on the heating member. Whether or not the image of the printing is formed by a toner whose major component is a thermoplastic resin, is determined on the basis of the result of the above decision.

    摘要翻译: 在使用调色剂由电子照相复印机产生的鉴别真实证据的副本的方法和装置中,加热到高于50℃和低于250℃的加热构件与印刷接触以观察是否 印刷上的图像变化或者加热构件上存在任何沉积物。 根据上述判定结果确定印刷图像是否由主要成分为热塑性树脂的调色剂形成。