Apparatus for writing on, and/or reading, magnetic discs
US4024581A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1974 |
| Grant date | May 17, 1977 |
| Priority date | — |
| Expiry date | Nov 20, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/035
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The apparatus is used for writing on and/or reading two magnetic discs of flexible type each one contained for rotation in a protective cover provided with transducer apertures. The apparatus comprises two insertion devices on which the protective covers of the discs are inserted in manner that the discs lie substantially in two parallel planes, having the corresponding magnetizable surfaces oppositely faced therebetween. The insertion devices through corresponding counter-mandrels, causes the discs to engage a pair of driving mandrels for the rotation of the two discs. The driving mandrels and the discs are rotated in opposite senses and, between the two discs, are disposed two transducers which are jointly positioned with respect to the magnetizable surfaces of the discs along the transducer apertures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.