US3678211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air bearing magnetic head with glass slider body
Assignee: International Business Machines Corp
•
Filing: 1969-08-18
•
Granted: 1972-07-18
•
Expires: 1989-08-18
Abstract
Abstract An air bearing slider assembly includes a U-shaped magnetic head and a monolithic glass body which is formed in the glassy state so as to chemically as well as physically bond the head thereto, a nonmagnetic gap in the base of the head being disposed at an air bearing surface of the glass body to facilitate noncontact magnetic recording. The slider assembly is fabricated using a mold having a central cavity which defines the desired configuration of the glass body and which positions the magnetic head at a selected location relative to the glass body to be formed. The mold cavity is filled with a fluid glass composition which solidifies as a monolithic body in bonded relation to the head.
Inventors
- 👤 Helen M Hoogendorn
- 👤 Bernt Narken
- 👤 Paul J Roeder
- 👤 Brian Sunners
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:25
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49027; Y10T29/4903
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
67 words
An air bearing magnetic head assembly comprising: at least one magnetic head; and a monolithic transparent glass slider body, chemically bonded to at least one surface of the head by forming the body in a glassy state in contact with the magnetic head, and the body together with the head providing an integral structure in which the head is held by the body in fixed relation thereto.
Claim 2
Dependent Claim
67 words
An air bearing magnetic head assembly comprising: at least one magnetic head; and a monolithic transparent glass slider body, chemically bonded to at least one surface of the head by forming the body in a glassy state in contact with the magnetic head, and the body together with the head providing an integral structure in which the head is held by the body in fixed relation thereto.
Claim 3
Dependent Claim
62 words
A magnetic head assembly in accordance with claim 1, wherein the glass of the monolithic body is of a type which becomes fluid at a temperature less than 650* C. and which has a surface energy within the range of 200-350 dynes centimeter and viscosity within the range of 103-104 poises enabling the glass to readily wet the magnetic head when fluid.
Claim 4
Dependent Claim
78 words
An air bearing magnetic head assembly comprising: at least one generally U-shaped magnetic head having a pair of leg portions joined by a base portion, said base portion including a nonmagnetic gap; and a monolithic transparent slider body of substantially glass composition encompassing and chemically bonded to said head by forming the body in a glassy state in contact with the magnetic head, said body having a base surface substantially continuous with the base portion of the head.
Claim 5
Dependent Claim
78 words
An air bearing magnetic head assembly comprising: at least one generally U-shaped magnetic head having a pair of leg portions joined by a base portion, said base portion including a nonmagnetic gap; and a monolithic transparent slider body of substantially glass composition encompassing and chemically bonded to said head by forming the body in a glassy state in contact with the magnetic head, said body having a base surface substantially continuous with the base portion of the head.
Claim 6
Dependent Claim
17 words
A magnetic head assembly in accordance with claim 3, wherein the head is substantially of ferrite material.
Claim 7
Dependent Claim
40 words
A magnetic head assembly in accordance with claim 3, wherein the body includes a pair of head suppOrting surfaces, and each leg portion of the head is in chemical bonding contact with a different one of the head supporting surfaces.
Claim 8
Dependent Claim
48 words
A magnetic head assembly in accordance with claim 3, wherein the glass of the monolithic body is moisture resistant, becomes fluid at a temperature less than 650* C., and has a surface energy within the range of 200-350 dynes/centimeter and a viscosity within the range of 103-104 poises.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |