Fluidic transducer access opening in a stack of flexible record disks
US4019204A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1975 |
| Grant date | Apr 19, 1977 |
| Priority date | — |
| Expiry date | Nov 19, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Selectively altering air flow generates an access opening for a record surface on one of a large plurality of flexible record storage disks coaxially supported on a common spindle for rotation. Air flow through the interstices between the disks usually is sufficient to stabilize rotation of the disks. To generate a transducer access opening the air flow on one axial side of a record disk to be accessed, which includes a record surface, is altered in a manner that disks axially adjacent and facing the record surface tend to axially move together at their periphery, resulting in a peripheral transducer access opening adjacent a stabilized record disk. In a preferred form of the invention, the axial extent of the altered air flow is limited to a predetermined portion of the stack of disks for minimizing the volume of air flow change. For dual sided recording, the air flow is altered at either side of the record disk to be accessed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.