| 摘要 |
PURPOSE:To remove foreign matter adhering to the surface of a magnetic recording medium, by holding its both surfaces to be caught by polishing sheets having flexibility while applying a load from the upper of these polishing sheets by heads to the magnetic recording medium and polishing its surface. CONSTITUTION:Both surfaces of a magnetic recording medium 1 are held to be caught by polishing sheets 2, 3 of small piece shape. A load is applied from the upper of these polishing sheets 2, 3 to the magnetic recording medium 1 by actual heads or solid blocks 4, 5 of almost equal shape to the shape of the head. That is, one head 5 is fixed while the other head 4 is urged to a side of the head 5 by resilience of a compression spring 6. Under this condition, the magnetic recording medium 1, being driven running in a direction A in the drawing, performs mirror polishing of the surface and removes foreign matter B. As in the above, the magnetic recording medium, applying the load by the head or the solid block of almost equal shape to the shape of the head, eliminates the possibility of the foreign matter sinking in the polishing sheet, preventing the surface of the magnetic recording medium from damage.
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