Process for the manufacture of magnetic recording media

US4201486A · kind A · utility

Assignee

• BASF SE

Inventors

• Werner Huebner · Bischofswerda, DE
• Job-Werner Hartmann · Ludwigshafen, DE
• Friedrich Domas · Altlußheim, DE
• Peter Nagel · Highlands, US
• Paul Deigner · Bad Dürkheim, DE
• Eberhard Koester · Bischofswerda, DE
• Hans Hauser · Horgen, CH

Key dates

• Filing date: May 11, 1978
• Grant date: May 6, 1980
• Expiry date: May 11, 1998

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B5/848
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A process and apparatus for the manufacture of magnetic recording media, in which, immediately before the magnetic dispersion is applied to a base, the dispersion is subjected to shear by means of a disc rotatably mounted in a housing, by introducing it at the center of rotation of the disc and forcing it through a gap formed between the face of the disc and the wall of the housing, which gap tapers toward the rim of the disc.