Examination of Spur Marks Found on Inkjet-printed Documents

    Volume 50, Issue 4 (July 2005)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Page Count: 9


    Kobayashi, K
    National Research Institute of Police Science,

    Akao, Y
    National Research Institute of Police Science,

    Seki, Y
    National Research Institute of Police Science,

    Abstract

    In this paper, we propose the examination of spur mark evidence on inkjet-printed documents. Spur marks are tool marks created by the spur gears in the paper conveyance system of many inkjet printers. The relationship between printouts and printers were investigated by comparing the spur marks found on printed documents with reference spur marks sampled from known printers. The comparison was based on two characteristics of spur marks: pitch and mutual distance. These characteristics extracted the geometric features of spur marks and provided information on the type of spur gears and their location in the paper conveyance system. The spur marks on a printout matched the reference spur marks within three percent of the measured values. Spur marks were considered to be effective class characteristics to identify certain brands of inkjet printers since spur gears are used in many types of these machines.


    Paper ID: JFS2004061

    DOI: 10.1520/JFS2004061

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    Author
    Title Examination of Spur Marks Found on Inkjet-printed Documents
    Symposium , 0000-00-00
    Committee E30