Patent · US Expired

Device for magnetically orienting the magnetizable particles or magnetic recording media in a preferred direction

US4382244A · kind A · utility

5Cited by

4References

1Claims

0Family size

Assignee

BASF SE

Inventors

Eberhard Koester · Bischofswerda, DE
Paul Deigner · Bad Dürkheim, DE
Dieter Schaefer
Karl Uhl
Roland Falk · Achern, DE

Key dates

Filing date	Mar 11, 1981
Grant date	May 3, 1983
Priority date	—
Expiry date	Mar 11, 2001

Classification

Technology area (CPC G)Physics
CPC primaryG11B5/845
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A device for magnetically orienting the magnetizable particles of magnetic recording media in a preferred direction, which media are obtained by applying a coating of anisotropically magnetic particles finely dispersed in a solution of an organic binder system and conventional additives to a non-magnetic base, and subsequently solidifying the coating, by the action, on the still fluid coating, of the magnetic fields produced by two E-shaped electromagnets arranged symmetrically with respect to, and in mirror-image relationship to, the plane of the said coating.

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