Head-tape alignment apparatus with a tape edge find operation
US4802030A · kind A · utility
39Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1986 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Jun 25, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/086
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A solution to accurately aligning a read-write head over a previously written data track on both a write protected and not write protected tape is disclosed. A control unit, preferably a programmed microprocessor, electronically provides a sequence of control outputs to move the tape and step the head to locate an edge of the tape. The control unit then moves the head a fixed distance to be over a selected data track. A threshold circuit controls the readout of data from the head of the tape in such a way as to improve edge find reliability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.