US4639813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning disket with internal paths for cleaning liquid
Assignee: NAGAOKA KK
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Filing: 1985-06-07
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Granted: 1987-01-27
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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 disk a cleaning sheet formed to the same shape and dimension of the magnetic disk of floppy disk is rotatably placed and a cleaning liquid supplier is provided to the case to supply the cleaning liquid to the cleaning sheet as the cleaning liquid is injected under pressure from outside.
Inventors
- 👤 Masatoshi Uno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:09
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/41; G11B23/00; G11B23/02; G11B23/03; G11B23/0327
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
A head cleaning apparatus comprising: a case formed to the same shape and dimension of a hard case for a floppy disk; a cleaning sheet adapted to be rotated in the case and formed to the same shape and dimension of the magnetic disk of a floppy disk; and a cleaning liquid inlet tube provided to the case having means for supplying a cleaning liquid to the cleaning sheet with the cleaning liquid injected under pressure from outside the case, the cleaning liquid inlet tube being in communication with liquid supply paths extending within the case, said liquid supply paths having ejection holes opposing the cleaning sheet for causing the liquid to permeate the disk.
Claim 2
Dependent Claim
115 words
A head cleaning apparatus comprising: a case formed to the same shape and dimension of a hard case for a floppy disk; a cleaning sheet adapted to be rotated in the case and formed to the same shape and dimension of the magnetic disk of a floppy disk; and a cleaning liquid inlet tube provided to the case having means for supplying a cleaning liquid to the cleaning sheet with the cleaning liquid injected under pressure from outside the case, the cleaning liquid inlet tube being in communication with liquid supply paths extending within the case, said liquid supply paths having ejection holes opposing the cleaning sheet for causing the liquid to permeate the disk.
Claim 3
Dependent Claim
21 words
A head cleaning apparatus as defined in claim 1, further comprising a valve for normally closing said cleaning liquid inlet tube.
Claim 4
Dependent Claim
24 words
A head cleaning apparatus as defined in claim 1, wherein the valve is opened when the cleaning liquid is supplied to the inlet tube.
Claim 5
Dependent Claim
31 words
A head cleaning apparatus as defined in claim 1, wherein the case has a cover hinged to the case and adapted to be opened or closed for replacing the cleaning sheet.
Claim 6
Dependent Claim
31 words
A head cleaning apparatus as defined in claim 2, wherein the case has a cover hinged to the case and adapted to be opened or closed for replacing the cleaning sheet.
Claim 7
Dependent Claim
28 words
A head cleaning apparatus as defined in claim 1, wherein the case is formed at least partially transparent so that the cleaning sheet can be seen from outside.
Claim 8
Dependent Claim
28 words
A head cleaning apparatus as defined in claim 2, wherein the case is formed at least partially transparent so that the cleaning sheet can be seen from outside.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |