Encodable insert for a recording cassette
US4897750A · kind A · utility
2Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 1988 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | May 9, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/08714
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Digital videocassettes are encoded by punching out breakaway tabs to permit a sensing mechanism on a recorder to identify key characteristics of each cassette. The encoding can be changed when the breakaway tabs are carried by an insert that can be remvably affixed to the cassettes. By employing such an insert, a number of problems are avoided such as possible contamination of the cassette and/or recorder by loose tabs. The tabs of the insert do not need to be breakaway when the inserts are initially formed to provide desired codes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.