System for detecting an edge of a moving data storage medium
US6570731B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2001 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Dec 8, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The system for detecting the edge of a moving data storage medium measures the ambient noise level of the magneto-resistive read head when the magneto-resistive read head is completely off the magnetic tape media. The system for detecting the edge of a moving data storage medium sets a signal threshold that is a predetermined increase over the magneto-resistive read head output signal generated by the ambient noise. The system for detecting the edge of a moving data storage medium then moves the magneto-resistive read head on to the magnetic tape media, where an increase in the magneto-resistive read head output signal is generated due to the friction of the moving magnetic tape coming into contact with the magneto-resistive read head, causing an increased noise level. The resultant increase in the magneto-resistive read head output signal, when it exceeds the signal threshold, is indicative of the presence of the edge of the magnetic tape and can be used as an accurate measure of the edge of the magnetic tape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.