US5012355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary head type magnetic recording/reproducing apparatus with read-after-write feature
Assignee: Alps Alpine Co Ltd
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Filing: 1989-08-31
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Granted: 1991-04-30
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Expires: 2009-08-31
Abstract
Abstract A rotary head type magnetic recording/reproducing apparatus having two playback heads A' and B' for verifying the recorded condition after recording on a magnetic tape by two recording/reproducing heads A and B (read-after-write) by which any recording error is found immediately. Two playback heads A' and B' are mounted, respectively, at positions separated by 90° around a rotational center axis relative to the recording/reproducing heads A and B along the head rotating direction. Heads A' and B' are mounted also deviating by a particular dimension relative to the recording/reproducing heads A and B, along a direction perpendicular to the head scanning direction. Since read-after-write is performed immediately after recording, any recording error is found almost simultaneously with recording, by performing read-after-write as in normal reading.
Inventors
- 👤 Yuji Taga
- 👤 Masashi Katoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:28
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/36; G11B5/00; G11B5/008; G11B5/00813; G11B5/00847; G11B5/0086; G11B20/00; G11B20/10; G11B20/18; G11B20/1879
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
160 words
A rotary head device for recording on a tape comprising: a rotary drum which rotates in at least one direction; a first recording/reproducing head mounted on a surface of the rotary drum; a second recording/reproducing head mounted on the surface of the rotary drum at a position opposing the first recording/reproducing head; a first playback head for playing back data recorded on the tape by the first recording/reproducing head and mounted on the surface of the drum at a position between the first recording/reproducing head and the second recording/reproducing head; and a second playback head for playing back data recorded on the tape by the second recording/reproducing head and mounted on the surface of the drum at a position opposing the first playback head; wherein when the rotary drum rotates in a direction for recording on the tape, on each rotation of the drum, the first playback head scans the tape prior to the second recording/reproducing head scanning the tape.
Claim 2
Dependent Claim
160 words
A rotary head device for recording on a tape comprising: a rotary drum which rotates in at least one direction; a first recording/reproducing head mounted on a surface of the rotary drum; a second recording/reproducing head mounted on the surface of the rotary drum at a position opposing the first recording/reproducing head; a first playback head for playing back data recorded on the tape by the first recording/reproducing head and mounted on the surface of the drum at a position between the first recording/reproducing head and the second recording/reproducing head; and a second playback head for playing back data recorded on the tape by the second recording/reproducing head and mounted on the surface of the drum at a position opposing the first playback head; wherein when the rotary drum rotates in a direction for recording on the tape, on each rotation of the drum, the first playback head scans the tape prior to the second recording/reproducing head scanning the tape.
Claim 3
Dependent Claim
46 words
The device of claim 1, wherein the first recording/reproducing head is separated from the second recording/reproducing head by 180°, the first playback head is separated from the first recording/reproducing head by 90°, and the second playback head is separated from the second recording/reproducing head by 90°.
Claim 4
Dependent Claim
62 words
The device of claim 1, wherein the first and second recording/reproducing heads are mounted on the drum at differing azimuth angles, the first playback head is mounted on the drum at the same azimuth angle as is the first recording/reproducing head, and the second playback head is mounted on the drum at the same azimuth angle as is the second recording/reproducing head.
Claim 5
Dependent Claim
53 words
The device of claim 1, wherein the first playback head is mounted lower on the rotary drum by a predetermined distance than is the first recording/reproducing head, and the first playback head thereby scans the tape in a path offset by a predetermined length from a path scanned by the first recording/reproducing head.
Claim 6
Independent Claim
166 words
A method for recording on a tape comprising the steps of: rotating a rotary drum in at least one direction; providing a first recording/reproducing head mounted on a surface of the rotary drum; providing a second recording/producing head mounted on the surface of the rotary drum at a position opposing the first recording/reproducing head; providing a first playback head for playing back data recorded on the tape by the first recording/reproducing head and mounted on the surface of the drum at a position between the first recording/reproducing head and the second recording/reproducing head; and providing a second playback head for playing back data recorded on the tape by the second recording/reproducing head and mounted on the surface of the drum at a position opposing the first playback head; and rotating the rotary drum in a direction for recording on the tape and, on each rotation of the drum, scanning the tape with the first playback head prior to scanning the tape with the second recording/reproducing head.
Claim 7
Independent Claim
166 words
A method for recording on a tape comprising the steps of: rotating a rotary drum in at least one direction; providing a first recording/reproducing head mounted on a surface of the rotary drum; providing a second recording/producing head mounted on the surface of the rotary drum at a position opposing the first recording/reproducing head; providing a first playback head for playing back data recorded on the tape by the first recording/reproducing head and mounted on the surface of the drum at a position between the first recording/reproducing head and the second recording/reproducing head; and providing a second playback head for playing back data recorded on the tape by the second recording/reproducing head and mounted on the surface of the drum at a position opposing the first playback head; and rotating the rotary drum in a direction for recording on the tape and, on each rotation of the drum, scanning the tape with the first playback head prior to scanning the tape with the second recording/reproducing head.
References Cited (Backward Citations)
US4669002A
Cited
JPH08171404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-29 | 1994-10-29 | 1995-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-29 | 1998-10-29 | 1999-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-29 | 2002-10-29 | 2003-04-30 | $7700.00 | Window Closed / Lapsed |