Method and apparatus for controlling reel-to-reel tape transportation
US5032938A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1988 |
| Grant date | Jul 16, 1991 |
| Priority date | — |
| Expiry date | May 25, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic head is provided in a tape transport path along which a magnetic tape is transported from one reel directly to another reel. In order to record or reproduce data to or from the magnetic tape with the magnetic head while the magnetic tape travels, it is necessary to stabilize a tape velocity at the magnetic head position to a desired velocity. The tape velocity at the magnetic head position is determined based on tape velocities at the respective reel positions, a tape path length from the head to one reel and a tape path length from the head to the other reel, and a closed loop control is effected by using the tape velocity at the magnetic head position to match the tape velocity to a desired velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.