Perforation devices
1982; Elsevier BV; Volume: 19; Issue: 1 Linguagem: Inglês
10.1016/0379-0738(82)90148-7
ISSN1872-6283
Autores Tópico(s)Structural Integrity and Reliability Analysis
ResumoPerforation devices are used in business and government to cannel, register or mark important documents by cutting holes in them rather than affixing stamped or written notations. The paper describes how the perforators operate, how they can be identified, and how perforations are forged and the forgeries detected.
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