Clamping device for optical disk assemblies
US4553232A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1983 |
| Grant date | Nov 12, 1985 |
| Priority date | — |
| Expiry date | Jan 17, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/24097
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device is disclosed for clamping disk assemblies in a manner to impart constant tension to a support web and cover sheet, while assuring easy and quick loading and unloading of the assembly. The optical disk assembly includes a web assembly including a flexible disk-shaped support web and preferably an opposed cover sheet. An annular retaining ring engages the web assembly around its periphery. The support web carries a record layer with an information storage region. The optical disk assembly is mounted on a reference structure. The web assembly is drawn over an annular locating surface integral with the reference structure to subject the web assembly to circumferentially-symmetric tension. The tension may be constant or, in some embodiments of the invention, may be changeable from a low "storage" tension to a higher "operating" tension. Clamping elements are movable radially over the optical disk assembly from a retracted position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.