Magnetic head for recording and reading magnetic data with variable track width
US4405959A · kind A · utility
11Cited by
7References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1981 |
| Grant date | Sep 20, 1983 |
| Priority date | — |
| Expiry date | Mar 9, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/2452
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to recording and reading heads used in the field of magnetic recording. In the case where the same magnetic head serves for these two operations, the invention proposes giving to the two rectangular facing polar surfaces defining the effective air gap, different transverse dimensions, leading to a wide recorded track due to the leakage flux and a narrow read track. This difference minimizes the influence of lateral instability in movement of the mobile magnetic support medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.