Bernoulli plate for stabilization of flexible magnetic disk
US4419704A · kind A · utility
23Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1981 |
| Grant date | Dec 6, 1983 |
| Priority date | — |
| Expiry date | Apr 24, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/32
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved Bernoulli plate for juxtaposition to a rotating flexible magnetic disk so that the disk is rendered substantially rigid by a vacuum formed by the air between the plate and the disk being urged outwardly under the influence of centrifugal force is disclosed. The plate is formed by coining a metal substrate and thereafter electroplating the coined substrate so that any sharp irregularities resulting from the coining operation are smoothed, while the surface is provided with a hard, wear-resistant coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.