Magnetic tape cassette
US4840326A · kind A · utility
4Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1988 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Jan 13, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/08728
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An magnetic tape cassette of the type in which the tape is wound on flangeless hubs and the tape is pulled out through an opening in the cassette for recording and reproducing having improved tape winding characteristics. An annular projection is formed around each of the flangeless hubs, and a rib having about the same height as the annular projection extends radially outwardly from the radial projection in an area corresponding to the first-wound portion of the tape. The rib keeps the tape from deviating sideways as it is initially wound onto the hub.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.