US4719692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a magnetic head assembly
Assignee: Alps Alpine Co Ltd
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Filing: 1985-12-10
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Granted: 1988-01-19
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Expires: 2005-12-10
Abstract
Abstract A method of manufacturing a magnetic head assembly including a carriage, a lower magnetic head fixed to the carriage, a spring-loaded arm connected to the carriage, and an upper magnetic head fixed to the arm and facing the lower head, the upper and lower heads defining therebetween a clearance having a width which is equal to the thickness of a magnetic disk, the arm is so supported at its end remote from the upper head that it may be rotatable only in a direction which allows the upper head to face the lower head.
Inventors
- 👤 Satoshi Sakai
- 👤 Yuichi Hishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:33
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/56; G11B17/00; G11B17/32; G11B5/4806; G11B5/4826; G11B5/58; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49027; Y10T29/4903
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
A method of manufacturing a magnetic head assembly comprising: fixing a lower magnetic head to a carriage; mounting an upper magnetic head rotatably by a gimbal spring on an arm having a rear end remote from said upper head which is so positioned as to face said lower head; connecting said rear end of said arm to said carriage so that said arm may be rotatable only in a direction which allows said upper head to face said lower head; maintaining between said upper and lower heads a clearance having a width which is equal to the thickness of a magnetic disk; and fixing said upper head to said arm.
Claim 2
Independent Claim
110 words
A method of manufacturing a magnetic head assembly comprising: fixing a lower magnetic head to a carriage; mounting an upper magnetic head rotatably by a gimbal spring on an arm having a rear end remote from said upper head which is so positioned as to face said lower head; connecting said rear end of said arm to said carriage so that said arm may be rotatable only in a direction which allows said upper head to face said lower head; maintaining between said upper and lower heads a clearance having a width which is equal to the thickness of a magnetic disk; and fixing said upper head to said arm.
Claim 3
Dependent Claim
25 words
A method as set forth in claim 1, further including adjusting the azimuth and position of said upper head before fixing it to said arm.
Claim 4
Dependent Claim
25 words
A method as set forth in claim 2, further including removing said gimbal spring from said arm after fixing said upper head to said arm.
Claim 5
Dependent Claim
20 words
A method as set forth in claim 1, wherein said upper head is fixed to said arm by a adhesive.
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) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |