Magnetic head
US4910629A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1988 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | Oct 3, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/32
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to attain a good contact with a magnetic sheet, a magnetic head with a pair of magnetic gaps has an external configuration and a sliding surface which satisfy formulas of: EQU 0.2<W.sub.R /W.sub.T <0.8, EQU -0.2W.sub.T W.sub.C +0.9<W.sub.R W.sub.T <-0.17W.sub.T W.sub.C +1.2, and EQU 1.5<R.sub.W /R.sub.R <4.4, where W.sub.R and W.sub.T are lengths of the magnetic head in a rotational direction and in a track-width direction of the magnetic sheet, respectively, W.sub.C is a distance between the magnetic gaps and R.sub.W and R.sub.R are radii of curvatures of the sliding surface in the track-width direction and in the rotational direction, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.