Characteristics of Marks on Concave Key Duplicated by Machine

Abstract:

In this paper, the marks on the concave keys used as guide keys duplicated by machine which has the function of profile modeling was analyzed systematically by experiments. In the experiment, the research concentrated on following aspect, the distinguish between mark on the concave key duplicated by machine with the producing mark and the using mark, the regularities of distribution and emergence probability of the characteristic marks on the key duplicated. The experimental research indicates that there are distinctive marks on the keys when normally used and when used as guide keys. The marks formed on the region that profile modeling needle touches in the process of duplicating have distinguishing characteristic. Therefore, the method is put forward that the examination of concave key can reveal distinctive marks whether the key has been used as a guide to create another key, it will be very useful to estimate criminality and analyze criminal scene.

• Periodical: Advanced Materials Research (Volumes 690-693)
• Pages: 3386-3389
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.690-693.3386
• Online since: May 2013
• Authors: Yi Jin
• Keywords: Characteristic, Concave Key, Duplicate, Examination, Mark

References

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