Magnetic tape cassette having a sliding closure member that locks the winding hubs
US4961124A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1988 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | Oct 11, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/08742
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved magnetic tape cassette with locking elements for the magnetic tape, through which the opening formed in the front side of the cassette as well as the cut out regions of the winding shaft entry openings are effectively sealed, is characterized in that the slide (15) adjacent to the cassette underside (5) possesses at least two locking catches (21), which move in the grooves (22) of the cassette lower part and which are positioned so that they engage with the toothed rings of the winding hubs (6a,6b) when the slide is in its locked state. Additionally, the slide comprises in the center of its front part a catch, which dips into a groove (25), open forwards as well as downwards, on the outside of the cassette lower part. Through the construction according to the invention, the otherwise customary reel brake together with the prestressing spring becomes superfluous (FIG. 3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.