Electrostatic developing toner
US7280786B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2006 |
| Grant date | Oct 9, 2007 |
| Priority date | — |
| Expiry date | Jan 3, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0835
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrostatic developing toner which can effectively suppress image fogging*1 by setting a ratio (d/D) of the average particle diameter D of the toner and the average particle diameter d of iron oxide particles contained in the toner as a colorant to within a predetermined range, and by setting the value of a ratio (σr/σs) between the residual magnetization σr and saturation magnetization σs of the iron oxide particles to a predetermined value or less, is provided. The value of the ratio (d/D) of the average particle diameter D of the toner and the average particle diameter d of iron oxide particles contained in the toner as a colorant is set to within the range of 0.01-0.03, and the value of the ratio (σr/σs) between the residual magnetization σr and saturation magnetization σs of the iron oxide particles is set to 0.3 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.