Iron core assembly for magnetizing columnar permanent magnets for use in electrostatic developing apparatus
US4169998A · kind A · utility
9Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1977 |
| Grant date | Oct 2, 1979 |
| Priority date | — |
| Expiry date | Oct 3, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F13/003
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is an iron core assembly for magnetizing columnar permanent magnet, particularly columnar ceramic permanent magnets adapted for use in magnetic-brush type electrostatic developing apparatus. The invention is to clarify the magnetic pattern most effective for the development, as well as a construction for presenting such a pattern, and is aiming to provide a magnetizing iron core assembly having an improved construction of magnetic poles and magnetizing coil windings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.