Patent · US Expired

Demagnetizing device for magnetic recording media

US5198959A · kind A · utility

14Cited by

6References

2Claims

0Family size

Assignee

BASF SE

Inventors

Bernd Scholtysik · Munich, DE
Jose Toral · Munich, DE
Hermann Brandstetter · Munich, DE
Manfred Baumann · Diepoldsau, CH

Key dates

Filing date	Mar 20, 1991
Grant date	Mar 30, 1993
Priority date	—
Expiry date	Mar 20, 2011

Classification

Technology area (CPC G)Physics
CPC primaryG11B5/0245
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The invention relates to a demagnetizing device for magnetic recording media, so-called pancakes, wound up in the form of a tape, which device consists of a cylindrical coil (1), the field distribution (3) of which extends essentially parallel to the winding plane (2) of the recording medium (4), while the pancakes (4) can be inserted into the coil (1) in the axial direction by a lifting device (5). The compact form enables an entire pancake stack to be demagnetized at the same time (FIGURE).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.