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IDENTIFICATION OF IBM KEYPUNCH MACHINES BY THEIR PRINTED PRODUCTS

NCJ Number
36954
Journal
Journal of Forensic Sciences Volume: 21 Issue: 4 Dated: (OCTOBER 1976) Pages: 949-958
Author(s)
C E Curvey; C E Eaton
Date Published
1976
Length
10 pages
Annotation
IBM (INTERNATIONAL BUSINESS MACHINES) KEYPUNCH MACHINES CAN BE IDENTIFIED INDIVIDUALLY BY THE DISTINGUISHING CHARACTERISTICS OF THE SYMBOLS PRINT ON THE PUNCH CARDS.
Abstract
THE MISALIGNMENT OF TINY WIRES USED IN THE PRINTING PROCESS FACILITATES THE IDENTIFICATION.

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