Carrier for electrophotographic developer, process for preparing the same and developer prepared by using said carrier
US5419994A · kind A · utility
11Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1992 |
| Grant date | May 30, 1995 |
| Priority date | — |
| Expiry date | Sep 3, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An iron carrier for an electrophotographic developer, the carrier having a mean particle diameter of 25 to 40 .mu.m, a magnetization of at least 160 emu/g at 3000 Oe, an apparent density of 3.0 to 4.2 g/cm.sup.3, a percentage sphericity of at least 80%, and a specific surface area of at least 350 cm.sup.2 /g as determined by an air permeation method; a process for preparing the carrier by a plasma method; and an electrophotographic developer comprising the carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.