Dual layered magnetic data card with reading and recording apparatus
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United States of America Patent
Stats
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Mar 26, 1991
Grant Date -
N/A
app pub date -
May 13, 1988
filing date -
May 14, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A dual layered magnetic card with an apparatus for reading data therefrom and recording data thereon. The magnetic card includes (a) a card body, (b) a first magnetic layer disposed on the card body, the first magnetic layer including a first magnetic material, (c) a second magnetic layer disposed on the first magnetic layer, the second magnetic layer including a second magnetic material having Curie temperature lower than that of the first magnetic material and a coercive force at an ambient temperature higher than that of the first magnetic material. Also disclosed is an apparatus for reading data on the magnetic card, having a reader, post processor and data eraser, and an apparatus for reading and recording data having a recorder, reader, post processor and a data eraser.
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