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Priority to DE19742445426priorityCriticalpatent/DE2445426C2/de
Priority claimed from DE19742445426external-prioritypatent/DE2445426C2/de
Publication of DE2445426B1publicationCriticalpatent/DE2445426B1/de
Publication of DE2445426A1publicationCriticalpatent/DE2445426A1/de
Application grantedgrantedCritical
Publication of DE2445426C2publicationCriticalpatent/DE2445426C2/de
G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
G06K7/06—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means which conduct current when a mark is sensed or absent, e.g. contact brush for a conductive mark