Dual-column tension and speed controller for high speed tape transporter
US4727440A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1986 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Mar 6, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/58
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A closed loop, high-speed tape transporter (10) includes a vacuum supply (11A), a first vacuum column (40) operatively connected to the vacuum supply (11A) and positioned upstream from a pick-up head (100) and downstream from a tape bin (64) for receiving the loop of tape and exerting a vacuum-induced holdback tension thereon, a second vacuum column (50) operatively connected to the vacuum supply (11A) and positioned downstream of head (100) and upstream of the tape bin (64) for exerting a vacuum-induced pull forward tension on the tape in opposition to the holdback tension exerted on the tape by the first vacuum column (40). A motor-driven capstan (60) is positioned intermediate the pick-up head (100) and the second vacuum column (50). Capstan (100) is driven at a constant speed equal to the ideal reference tape duplication speed. Tape drive capstans (62A) and (70A) cooperate with the first and second vacuum columns (40) and (50) for moving the tape. A servo-control (42 ), (45), (48) senses changes in the position of the tape within the first vacuum column (40) and sends a signal to tape drive (70A) and a servo-control (58), (55), (56) senses changes in the position of the tape wi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.