Degaussing technique

Details Degaussing technique Degaussing technique

1992-04-17

1993-04-20

Griffin, Donald A.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

H01F 1300

Patent

active

052048012

ABSTRACT:
To degauss cassettes of magnetic tape, a magnetic field is applied to the magnetic material with a flux density of at least 1,000 gauss and at an angle between 20 degrees and 50 degrees from the horizontal of the magnetic tape for a time period of at least one second and the field is alternated at a frequency of at least ten hertz. The magnetic material may be rotated while it is in the field.

REFERENCES:
patent: 4423460 (1983-12-01), Jackson et al.
patent: 4639821 (1987-01-01), Littwin et al.
patent: 4897759 (1990-01-01), Becker

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