Patent JPS5953079A successfully refreshed from Google Patents.
Patent US4656790A successfully refreshed from Google Patents.
US4656790A
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Burnishing method and apparatus for magnetic disk
Assignee: Fujifilm Holdings Corp
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Filing: 1985-11-26
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Granted: 1987-04-14
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Expires: 2005-11-26
Abstract
Abstract A magnetic disk is rotated by a drive mechanism, and compressed air is jetted to the same positions on the two surfaces of the magnetic disk. An abrasive tape and a magnetic material surface of the magnetic disk are made to contact each other closely by compressed air, and the magnetic material surface of the magnetic disk is burnished by the abrasive tape.
Inventors
- 👤 Kazuo Mukai
- 👤 Akira Honjoh
- 👤 Shuji Nakata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:28
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/10; B24B7/16; B24B21/00; B24B21/04; B24B21/06; B24B21/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
A method of burnishing a surface of a magnetic disk by use of an abrasive tape, which comprises the steps of: rotating said magnetic disk, jetting compressed air via opposed air nozzles to the same positions on the two surfaces of said magnetic disk, intervening said abrasive tape between one of said air nozzels and one of said surfaces of said magnetic disk, and closely contacting said abrasive tape with the magnetic material surface of said magnetic disk and thereby conducting the burnishing.
Claim 2
Independent Claim
83 words
A method of burnishing a surface of a magnetic disk by use of an abrasive tape, which comprises the steps of: rotating said magnetic disk, jetting compressed air via opposed air nozzles to the same positions on the two surfaces of said magnetic disk, intervening said abrasive tape between one of said air nozzels and one of said surfaces of said magnetic disk, and closely contacting said abrasive tape with the magnetic material surface of said magnetic disk and thereby conducting the burnishing.
Claim 3
Dependent Claim
22 words
A method as defined in claim 1 wherein said abrasive tape is moved reversely to the rotating direction of said magnetic disk.
Claim 4
Independent Claim
67 words
An apparatus for burnishing a surface of a magnetic disk, which comprises a drive mechanism for supporting and rotating a magnetic disk, air nozzles positioned on each surface side of said magnetic disk so that they oppose each other for jetting compressed air at said magnetic disk, and an abrasive tape intervening between one of said air nozzles and a magnetic material surface of said magnetic disk.
Claim 5
Independent Claim
67 words
An apparatus for burnishing a surface of a magnetic disk, which comprises a drive mechanism for supporting and rotating a magnetic disk, air nozzles positioned on each surface side of said magnetic disk so that they oppose each other for jetting compressed air at said magnetic disk, and an abrasive tape intervening between one of said air nozzles and a magnetic material surface of said magnetic disk.
Claim 6
Dependent Claim
35 words
An apparatus as defined in claim 3 wherein air jetting ports of said air nozzles extend approximately from the inner edge portion to the outer edge portion of the recording area of said magnetic disk.
References Cited (Backward Citations)
US3283447A
Cited
US4535567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |