Rotary head assembly with pump-out type spiral grooves for more stable tape running
US4641214A · kind A · utility
17Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1984 |
| Grant date | Feb 3, 1987 |
| Priority date | — |
| Expiry date | Apr 20, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/53
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a rotary head assembly in which a rotary member (14) provided with a magnetic head (23) in the gap between the upper and the lower fixed cylinders (17 and 18) having nearly equal diameters and arranged coaxially with each other is turned, use is made of a structure such that the upper and the lower fixed cylinders (17 and 18) are secured in place and supported by a fixed shaft arranged coaxially therewith, whereby more stable magnetic tape running has been realized, while achieving ease of assembling with high accuracy and reduction of power consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.