Apparatus for recording magnetic impulses perpendicular to the surface of a recording medium
US4277809A · kind A · utility
63Cited by
11References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1979 |
| Grant date | Jul 7, 1981 |
| Priority date | — |
| Expiry date | Sep 26, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus is disclosed for recording magnetic impulses on a selectively magnetizable medium with such impulses being recorded with their axes of magnetization substantially perpendicular to the surface of the medium utilizing a recording medium having a high magnetic permeability backing layer and an overlying coating of magnetic material having uniaxial anisotropy substantially perpendicular to the surface of the backing layer, and using a unitary magnetic head for both recording and playback with such head positioned adjacent to one side of the recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.