Magnetic particles for magentic toner and process for producing the same
US5843610A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1997 |
| Grant date | Dec 1, 1998 |
| Priority date | — |
| Expiry date | Oct 21, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2995
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A magnetic toner containing 100 parts by weight of magnetic Fe.sup.2+ -containing iron oxide particles having an average particle size of 0.05 to 0.30 .mu.m, containing not less than 0.9 atm % and less than 1.7 atm % of silicon, calculated as Si, based on Fe, having a substantially cubic shape each ridge of which has a curved surface, and having a ratio .phi. represented by the following formula of more than 1.0 and less than 1.4: EQU .phi.=l/w wherein l represents an average maximum length of said Fe.sup.2+ -containing particles and w represents an average minimum length of said Fe.sup.2+ -containing particles, and 10 to 900 parts by weight of a toner resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.