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Improved MICR E13B Reading Method Disclosure Number: IPCOM000059362D
Original Publication Date: 1988-Sep-01
Included in the Prior Art Database: 2005-Feb-16

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Hardy, KA [+details]


E13B magnetic ink characters, as used on standard bank checks, are stylized so as to be readable by a single gap magnetic head. As the character passes under the gap of the read head, an analog waveform, having positive and negative peaks at varying time displacements, is generated. A method of recognizing a character from its waveform involves comparing the negative peaks and the positive peaks with threshold values at fixed time intervals. AND/OR logic is then used to select or recognize the character from its peaks which exceed the thresholds. The method of this disclosure digitizes the analog wave form into 75 samples which are stored.