Fraud-resistant manual magnetic reader-writer system for debit c

Details Fraud-resistant manual magnetic reader-writer system for debit c Fraud-resistant manual magnetic reader-writer system for debit c

1985-05-20

1987-12-08

Trafton, David L.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235449, 235480, 235482, 235437, G06K 500

Patent

active

047119934

ABSTRACT:
A fraud-resistant manually-fed reader-writer is especially suited for debit card use, in which a credit balance is read into the memory of the reader. When the card reaches the end of its insertion-reading movement, a validity indication encoded on the magnetic stripe of such card is automatically eradicated by energizing a de-gaussing coil. If, after effecting transactions which debit the memory, the card is removed by some artifice without re-writing it with a reduced balance, such removed card will lack a validity indication and hence be incapable of re-use. Provisions are made to time the re-writing and to avoid forfeiture of the balance if the card should be withdrawn too slowly or too rapidly.

REFERENCES:
patent: 4146174 (1979-03-01), Darjany et al.
patent: 4228348 (1980-10-01), Lee
patent: 4322613 (1982-03-01), Oldenkamp
patent: 4513199 (1985-04-01), Sidline
patent: 4593328 (1986-06-01), Baus

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