Magnetic orientation system

Details Magnetic orientation system Magnetic orientation system

1982-06-08

1984-04-03

Smith, John D.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With means to orient coating particles

118623, 427 48, 427130, 264108, 335306, H01F 1300

Patent

active

044401060

ABSTRACT:
A two-part arrangement of permanent magnets with low retentivity conducting elements for the flow of magnetic force is used in order to orientate magnetically anisotropic pigments in a suspension in the direction of tape travel during the production of a magnetic tape by means of magnetic fields. The first part of the arrangement acts on the suspension with an inhomogeneous strong magnetic field of about 5000 A/cm which is narrowly restricted physically, without anticipating the orientation in the direction of tape travel. Orientation in the direction of tape travel takes place in the second part of the arrangement which has a physically extended but weaker field.

REFERENCES:
patent: 2711359 (1955-06-01), Von Behren
patent: 2796359 (1957-06-01), Speed
patent: 4177442 (1979-12-01), Bate et al.

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