Patent US4628388A successfully refreshed from Google Patents.
US4628388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Head cleaning apparatus
Assignee: NAGAOKA TOKYO JAPAN A CORP OF JAPAN KK
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Filing: 1985-06-07
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Granted: 1986-12-09
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Expires: 2005-06-07
Abstract
Abstract A head cleaning apparatus wherein in a case formed to the same shape and dimension of a hard case of hard-cased floppy disks a cleaning sheet formed to the same shape and dimension of the magnetic disk of floppy disk is rotatably installed. The cleaning sheet has microcapsules containing cleaning liquid on both sides of the sheet.
Inventors
- 👤 Hirokazu Kawabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:40
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/03; G11B23/0327; G11B5/00; G11B5/41
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
A head cleaning apparatus comprising: a case formed to the same shape and dimension of a hard case of hard-cased floppy disks; and a cleaning sheet rotatably installed in the case, the cleaning sheet formed to the same shape and dimension of the magnetic disk of a floppy disk, the cleaning sheet having microcapsules containing cleaning liquid attached on both sides of the sheet.
Claim 2
Dependent Claim
64 words
A head cleaning apparatus comprising: a case formed to the same shape and dimension of a hard case of hard-cased floppy disks; and a cleaning sheet rotatably installed in the case, the cleaning sheet formed to the same shape and dimension of the magnetic disk of a floppy disk, the cleaning sheet having microcapsules containing cleaning liquid attached on both sides of the sheet.
Claim 3
Dependent Claim
26 words
A head cleaning apparatus as defined in claim 1, wherein the case has a cover which can be opened and closed for replacing the cleaning sheet.
Claim 4
Dependent Claim
28 words
A head cleaning apparatus as defined in claim 1, wherein the case is made at least partially transparent so that the cleaning sheet can be seen from outside.
Claim 5
Dependent Claim
28 words
A head cleaning apparatus as defined in claim 2, wherein the case is made at least partially transparent so that the cleaning sheet can be seen from outside.
Claim 6
Dependent Claim
27 words
A head cleaning apparatus as defined in claim 1, wherein said cleaning liquid contains a substance that changes its color when contacted with oxygen in the air.
Claim 7
Dependent Claim
27 words
A head cleaning apparatus as defined in claim 2, wherein said cleaning liquid contains a substance that changes its color when contacted with oxygen in the air.
Claim 8
Dependent Claim
27 words
A head cleaning apparatus as defined in claim 3, wherein said cleaning liquid contains a substance that changes its color when contacted with oxygen in the air.
Claim 9
Dependent Claim
27 words
A head cleaning apparatus as defined in claim 4, wherein said cleaning liquid contains a substance that changes its color when contacted with oxygen in the air.
References Cited (Backward Citations)
JPS57127919A
Cited
JPS58158018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |