Reading stroke codes
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United States of America Patent
Stats
-
Sep 15, 1981
Grant Date -
N/A
app pub date -
Apr 17, 1979
filing date -
Apr 19, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The reading of an identification card with stroke code comprises sweeping of a control area by a laser beam, detection by photo-detectors of light reflected by the card and from the edges thereof, amplification, selection by a chronometer of the useful signal, placing of the signal into a buffer memory, and treatment by a micro-processor and an ordinator for reconstitution of a complete message by means of two successive incomplete sweeps comprising at least one upper or lower security character.
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