Extrusion coater for the production of a magnetic recording medi

Details Extrusion coater for the production of a magnetic recording medi Extrusion coater for the production of a magnetic recording medi

1995-12-04

1997-06-24

Lamb, Brenda A.

Coating apparatus

Immersion or work-confined pool type

Work-confined pool

118419, B05C 302

Patent

active

056413556

ABSTRACT:
An extrusion coater for the production of a magnetic recording medium having at least one coater slot is described, the lower lip arranged in a direction opposite to the running direction of the substrate and displaced forward relative to the upper lip containing, in its interior, a permanent magnet which is oriented approximately parallel to the upper edge of the lower lip and whose field lines are roughly perpendicular to the coating direction of the magnetic dispersion flowing through the coater slot. By means of this arrangement, it is possible substantially to reduce the layer thickness while achieving a satisfactory coating and also considerably to reduce the edge bead.

REFERENCES:
patent: 3681138 (1972-08-01), Ankenbrand et al.
patent: 4943451 (1990-07-01), Zimmer

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