Device for reading an elongate magnetic data carrier
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United States of America Patent
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Jul 29, 2003
Grant Date -
N/A
app pub date -
Jul 1, 2002
filing date -
Sep 24, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for reading an elongate magnetic data carrier attached to or embedded in an article, having an active read head adapted to have a lateral extent greater than the width of the data carrier, preferably four times greater, such that the magnetic field produced by the read head results in a signal from the data carrier which has an amplitude which varies by less than 50% for head to data carrier spacings of from 0 to 60 microns. A wide read head can also make the reading of data more reproducible when reading narrow tracks using swipe readers, where precise alignment is difficult to achieve.
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