Magnetic media erasure system

Details Magnetic media erasure system Magnetic media erasure system

1989-10-13

1992-07-21

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Erase

360 66, 361151, G11B 5325, G11B 503, H01H 4700

Patent

active

051328607

ABSTRACT:
An erasure system for magnetic information storage media is disclosed by which magnetic media, such as computer, video and audio tapes, cassettes and discs, can be thoroughly erased. The system uses high energy product permanent magnets preferably positioned so that their poles repel one another to induce "bucking magnetic fields" having lines of force active in the three spatial planes and parallel or tangential to the recorded signal track on the media being erased. The DC magnetic field thus applied causes the DC erasure of the media. The AC erasure effect comes about through the relative movement of the media through fixed magnetic fields of opposite polarity, causing the magnetic media to be subjected to a reversing polarity of magnetic saturation. The magnet configurations can be adjusted for use on helically recorded magnetic media, in addition to cross-field and conventional recording techniques.

REFERENCES:
patent: 4146956 (1979-04-01), Fujiwara
patent: 4218722 (1980-08-01), Yoshizawa
patent: 4423460 (1983-12-01), Jackson et al.
patent: 4462055 (1984-07-01), Jackson et al.
patent: 4467389 (1984-08-01), Knipp
patent: 4613919 (1986-09-01), Miyatake et al.
patent: 4956728 (1990-09-01), Hayata et al.
patent: 5043959 (1991-08-01), Minami et al.

Affiliated with

Also associated with

Rating

Magnetic media erasure system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic media erasure system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic media erasure system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-849108