Magnetic ink medium and corresponding reading unit, and method f

Details Magnetic ink medium and corresponding reading unit, and method f Magnetic ink medium and corresponding reading unit, and method f

1989-11-27

1993-03-23

Shepperd, John W.

Registers

Coded record sensors

Particular sensor structure

235440, 235493, G06K 708, G06K 700, G06K 1906

Patent

active

051966816

ABSTRACT:
The magnetic ink medium includes a plurality of magnetic regions which have diversifiable magnetic intensity and are mutually separated by spaces. At least one first part of the regions has a magnetic coercivity which differs from the remaining regions of the plurality of regions, in order to obtain at least two different readouts of the same plurality of regions upon applying different magnetic fields for orientating the plurality of regions.

REFERENCES:
patent: 3790754 (1974-02-01), Black et al.
patent: 4303949 (1981-12-01), Peronnet
patent: 4396886 (1983-08-01), Koester et al.
patent: 4734643 (1988-03-01), Bubenik et al.

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