Magnetic tape cassette
US5337973A · kind A · utility
12Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1992 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | Nov 10, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/08785
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic tape cassette which solves the problem of deformation of a guide groove due to a sink mark formed when the neighboring portions of a shaft insertion opening are reduced in thickness to reduce the weight of the cassette case. A tongue-shaped projection is formed adjacent to a central guide groove, the projection including a recessed portion, such as a circular recess or a lateral notch, for reducing the thickness of the projection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.