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Typewriter Exemplars

المؤلف:  Max M. Houck، Jay A. Siegel

المصدر:  Fundamentals of Forensic Science

الجزء والصفحة:  530

2026-08-25

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Typewriter Exemplars

When a questioned document is written on a typewriter, the best policy is to get the actual, suspect machine into the hands of the questioned document examiner. There are a number of variables with typewriters that can affect the appearance of the type on paper and they need to be controlled by the document examiner. For example, many typewriters permit the typist to adjust the pressure of the keystrokes to make the typed image darker or lighter. In addition, having the typewriter gives the examiner the opportunity to examine all of the typefaces as well as the ribbon. In the case of IBM Selectric® models, the typeface ball that was alleged to have made the questioned document must also be submitted. If the typewriter cannot be submitted, then it will be necessary to get a complete set of all characters at all settings of pressure. It is also advisable to type the exact questioned document on the typewriter so the examiner can make direct comparisons. If possible, the ribbon should also be submitted for examination.