Method and apparatus for polishing surface of magnetic recording medium
US5876270A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1996 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Oct 25, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/84
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is disclosed a method and apparatus for polishing a surface of a magnetic recording medium in which a magnetic layer surface of a magnetic tape is brought into contact with a polishing tape which is wound on a contact roll and travelled, and the magnetic tape and the polishing tape are travelled in opposite directions to polish the magnetic layer surface of the magnetic tape. In this invention, in surface polishing, a curvature of the contact roll at a position where the magnetic tape is brought into contact with the polishing tape at first is set to be 0.1 to 10 mm. In order to set the curvature of the contact roll at the position where the magnetic tape is brought into contact with the polishing tape at first to be 0.1 to 10 mm, for example, the curvature of the contact roll is continuously changed. More specifically, in consideration of the sectional shape of the contact blade, first and second curves which have different curvature radii are continuously formed from the supply side of the magnetic tape, and the curvature radius of the first curve is set to be smaller than the curvature radius of the second curve. Otherwise, a composite cylindrical roll having a shape obtai…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.