Apparatus for retrieving information previously recorded on recording tape irrespective of tape speed
US4985786A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1988 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Nov 23, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/913
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information reproducing apparatus quickly retrieves tape position information of a tape-shaped recording medium on which tracks are formed so as to record information and tape position information. This apparatus includes a tape speed detecting unit for continuously detecting the running speed of the tape-shaped recording medium, a cylinder speed setting unit for setting target values of rotation of a rotary cylinder for making constant the component of speed at which the head moves in a track direction according to the output of the tape speed detecting unit, and a cylinder control circuit for controlling the rotary cylinder so as to adapt its rotation to the target value of velocity of the cylinder set by the cylinder speed setting unit. By rotating the cylinder at a rotational speed at which data reproduction can take place at a tape speed obtained by the tape speed detecting unit, the tape position information can be positively read out even in a transient state when the running speed of the recording medium changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.