Apparatus for changing the helix angle of magnetic tape relative to a rotary head scanner
US5003424A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1988 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Nov 21, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/6653
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A helical scan magnetic tape record/reproduce apparatus includes apparatus for changing the helix angle of magnetic tape relative to a rotary head scanner. A pair of elongate, arcuate air-bearing guides are disposed immediately adjacent and tangential to opposite sides of a circumferential surface of the rotary head scanner. The guides are at a first elevation and first angle and a second elevation and second angle, respectively, to cooperatively guide magnetic tape along a path at a predetermined helix angle while the magnetic tape is partially wrapped around the rotary head scanner. The planes of the air-bearing guides are changed in equal but opposite directions to change the helix angle of the tape relative to the rotary head scanner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.