Tape cassette with a trapping layer having a corrosiveness which is equal to or higher than that of the magnetic recording layer on the tape
US5023739A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1989 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Feb 10, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/502
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tape cassette for a magnetic recording tape having metallic magnetic recording layer is provided with a gas trapping layer which is disposed on a portion of the cassette near the path of the magnetic recording tape stretched between a pair of reels. The trapping layer has a trapping tendency which is at least equivalent to that of the magnetic recording tape. Any corrosive gas components coming into the cassette is adsorbed by and made to react with the trapping layer so as to reduce the concentration of the corrosive gas reaching the metallic magnetic recording layer, thus preventing degradation of the magnetic recording layer and ensuring that recording is conducted with high recording density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.