Process for generating a latent magnetic image
US4397929A · kind A · utility
0Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1981 |
| Grant date | Aug 9, 1983 |
| Priority date | — |
| Expiry date | Jun 18, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In forming a latent magnetic image by imagewise demagnetization of a magnetized layer, less than the entire thickness of the exposed area is demagnetized so as to induce a magnetization of opposite polarity in the demagnetized area, thus reducing the net strength of the residual and induced magnetic fields within the exposed areas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.