Head pad and process for production of same
US5153797A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1991 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Apr 19, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/32
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A head pad having a drawing face which draws a flexible disk used for an electronic still camera, for example, by negative pressure and which is made so that the head, which moves along the radial direction of the disk so as to record or reproduce data on the disk, projects out on the drawing face, wherein said depressions are formed in the drawing face around the head and corner portions of the bottom faces of the depressions are further cut away to form undercut portions, thus facilitating generation of a greater negative pressure between the disk and the pad drawing face and enabling greater improvement of the head touch and enabling greater stabilization of the drawing force of the disk by the pad. Also, a process for production of the above head pad wherein one face of a plate material is polished to form the drawing face and then is etched to form depressions around the head and undercut portions at the corner portions of bottom faces of the depressions, whereby it becomes possible to mass produce high precision pads and it becomes possible to greatly reduce the cost of the manufacture of the pads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.