Tape control apparatus
US4160195A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1977 |
| Grant date | Jul 3, 1979 |
| Priority date | — |
| Expiry date | Sep 23, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/46
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus for controlling the speed, direction and tension of tape transported between a supply reel and a take-up reel. First and second drive motors are coupled to the supply and take-up reels for applying oppositely directed torques thereto, thereby bi-directionally driving the tape between these reels and applying back-tension to the driven tape. A speed detector detects the transport speed of the tape and generates a speed control signal proportional thereto. Torque voltage generators are responsive to the speed control signal for generating first and second torque voltages which are determinative of the torques respectively applied to the supply and take-up reels by the drive motors, the first and second torque voltages changing differentially with respect to each other as the speed control signal changes. The torque voltages are applied to motor drive means which is responsive to such torque voltages for producing first and second drive signals which, in turn, are applied to the drive motors to control the torque applied by the drive motors to the supply and take-up reels, whereby the tape is transported at a substantially constant speed. A command signal generator generates…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.