US4257078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Read device for plane magnetic recording medium
Assignee: TDK Corp
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Filing: 1979-03-13
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Granted: 1981-03-17
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Expires: 1999-03-13
Abstract
Abstract A read device for reading magnetic data stored in a plane magnetic recording medium comprises a magnetic head for reading magnetic data stored in a rotatable flexible plane magnetic recording medium and a pad pushing a rear surface of the magnetic recording medium to a direction of the magnetic head so as to contact the front surface of the magnetic recording medium with the magnetic head, and means for adjusting a projected distance of the pad to the magnetic recording medium.
Inventors
- 👤 Fujio Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:25
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
142 words
In a read device for reading magnetic data stored in a plane magnetic recording medium, comprising: a magnetic head for reading magnetic data stored in a rotatable flexible plane magnetic recording medium; a pressure pad support mounted adjacent a rear surface of the recording medium and spaced a predetermined distance from the recording medium; and a pressure pad carried in the support and projecting therefrom toward and into contact with the rear surface of the magnetic recording medium to urge the recording medium in a direction of the magnetic head so as to contact a front surface of the magnetic recording medium with the magnetic head, the improvement comprising screw means carried by the support and engaging the pad for adjusting a projected or displaced distance of the pad toward the magnetic recording medium, to thereby compensate for wear and the like.
Claim 2
Dependent Claim
142 words
In a read device for reading magnetic data stored in a plane magnetic recording medium, comprising: a magnetic head for reading magnetic data stored in a rotatable flexible plane magnetic recording medium; a pressure pad support mounted adjacent a rear surface of the recording medium and spaced a predetermined distance from the recording medium; and a pressure pad carried in the support and projecting therefrom toward and into contact with the rear surface of the magnetic recording medium to urge the recording medium in a direction of the magnetic head so as to contact a front surface of the magnetic recording medium with the magnetic head, the improvement comprising screw means carried by the support and engaging the pad for adjusting a projected or displaced distance of the pad toward the magnetic recording medium, to thereby compensate for wear and the like.
Claim 3
Dependent Claim
35 words
A read device according to claim 1 wherein said screw means for adjusting a projected distance of the pad is a female screw thread in the pad support, and a threaded male screw engaged therewith.
Claim 4
Dependent Claim
81 words
A read device according to claim 1 wherein said pad support has a hole therethrough with said female threads formed therein, said pad comprising a felt pad disposed in said hole and having a portion thereof projecting from the hole into contact with the rear surface of the recording medium, said threaded male screw engaging the felt pad in the hole of the support to positively adjust the projected distance of the pad from the hole when the screw is turned.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |