Tape transport with differential torque between takeup and feed reels
US5308016A · kind A · utility
3Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1992 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | May 27, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/43
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tape transport mechanism that senses the end of a tape while minimizing but not eliminating back tension at the tape-feeding end. Excessive back tension causes uneven transport in fast forward or rewind. Insufficient back tension causes slack that makes sensing the end of a tape impossible. Both result from keeping the torque identical on both takeup and feed reels. The mechanism automatically switches the torque as the tape reverses so that the takeup reel always has a higher torque than the feed reel, thereby insuring that the tape end is sensed and that tape transport is even regardless of speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.