Reel spring for magnetic tape cassettes
US5005780A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 2, 1990 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Jan 2, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/08721
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A reel spring for a magnetic tape cassette is formed from an elongated strip of stainless steel. The strip defines first and second edges extending throughout its length parallel to a longitudinal centerline. The strip has a flat, central base portion terminating at a first pair of transverse crimp lines. The crimp lines define transition sections which extend out of the plane of the base portion at a first angle. A second pair of transverse crimp lines at the ends of the transition sections define end portions of the strip. The end portions extend at a second angle to the plane of the base portion. The width of the strip between the first and second edges is about 0.315 inches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.