Magnetic recording material
US4626469A · kind A · utility
18Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1983 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Jun 17, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/25
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording material, which comprises a magnetic layer coated on a non-magnetic support is disclosed. The magnetic layer contains both carbon black fine powder having a mean primary grain size of less than 10 m.mu. and carbon black coarse powder having a mean primary grain size in the range of 50 to 120 m.mu. in a mixing ratio ranging from 95/5 to 5/95. The material is improved in both RF output and audio output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.