Magnetic toner and process cartridge
US6630275B2 · kind B2 · utility
5Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2002 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Apr 9, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0836
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A magnetic toner is formed of magnetic toner particles each comprising at least a binder resin and a magnetic iron oxide. The magnetic toner is provided with improved developing performances by realizing an appropriate surface-exposure state of the magnetic iron oxide, which is represented by a wettability characteristic in methanol/water mixture liquids of the magnetic toner such that it shows a transmittance of 80% for light at a wavelength of 780 nm at a methanol concentration in a range of 65-75% and a transmittance of 20% at a methanol concentration in a range of 66-76%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.