Tape withdrawal and tensioning mechanism for video cassette recorder/reproducer
US4092686A · kind A · utility
9Cited by
3References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1976 |
| Grant date | May 30, 1978 |
| Priority date | — |
| Expiry date | Feb 17, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/6653
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A mechanism for use with a video recorder/reproducer of the type which receives a standard video cassette for withdrawing the video tape from the cassette to prepare the tape for threading around a video scanner, for sensing tape position to provide inputs to the reel drive servo motors of independent, closed loop servo systems, and for adjusting the level of tension in the video tape during operation of the recorder/reproducer. The mechanism withdraws the tape in two diverging directions, equally from both reels. The tension level is controlled accurately and is selectively changed for different operating modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.