Method of reading recorded information from a magnetic tape that compensates for track pitch changes
US6141174A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1998 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Aug 14, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/05
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of multi-channel magnetic tape recording and reading that compensates for track pitch changes. The method utilizes a closed loop servo system to adjust lateral and azimuth position of the recording head assembly. Servo information is written at a slight azimuth angle, adjacent the outer most tracks of a band of tracks. The recording angle being based on a dimensional stability coefficient of the tape. After data is written at the initial angle, the azimuth angle of the head is rotated through a predetermined range of angle during read-only to align the outermost read gaps with the servo tracks. By doing so, signal strength is maximized across all tracks, even if track pitch changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.