Magnetic core for use in a development system
US6771923B2 · kind B2 · utility
1Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2002 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Dec 17, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0921
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A magnetic core includes an array of permanent magnets bonded to a cylindrical core. The magnets are formed of an extruded magnetic composite material containing a neodymium-boron-iron alloy. The magnetic core contains regions of alternating magnetic polarization arranged to create a multipole structure. Such extruded magnets easily constructed at low cost and offer close magnetic pole spacing with little or negligible surface discontinuity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.