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Method and apparatus for manufacturing magnetic recording medium

  • US 6,261,647 B1
  • Filed: 01/25/1996
  • Issued: 07/17/2001
  • Est. Priority Date: 02/01/1995
  • Status: Expired due to Fees
First Claim
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1. A method for manufacturing a magnetic recording medium comprising;

  • a. forming at least one magnetic layer containing magnetic powder particles on a web-like non-magnetic support;

    b. transporting the non-magnetic support in a transport direction;

    c. applying a first magnetic field to the magnetic layer in a plane that is perpendicular to a surface of the magnetic layer;

    d. applying a second magnetic field to the magnetic layer in a plane that is parallel to the surface of the magnetic layer by providing a fixed electric current to each of a plurality of electromagnets arranged in the transport direction;

    wherein an angle of a magnetic field formed by the first and second magnetic field with respect to the transport direction only gradually increases as the non-magnetic support is transported in the transport direction so that an orientation of the magnetic powder particles is increased in an oblique direction with respect to the surface of the magnetic layer as the non-magnetic support is transported.

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