The design and function of stripper plates in Hedman Company and Hall-Welter Co. chequewriters is discussed, with an explanation of how these plates can accumulate ink which may be deposited on a cheque in the areas above and below the impression. These markings have value in chequewriter impression examinations both as an individual characteristic and as a dating feature.
RESUMELe fonctionnement de la plaque pointillee dans les machines de la compagnie Hedman et Hall-Welter est discute, avec une explication que ces plaques peuvent accumuler les encres qui seront peut-etre deposees sur un cheque au dessus ou en bas des impressions. Ces marques ont une valeur dans les examens des impressions de ces machines; tant comme caracteristiques individuelles que comme traits indiquant la date de I'impression.
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