Toner for electrophotography, and image fixing process, image forming process, image forming apparatus and process cartridge using the same
US7217485B2 · kind B2 · utility
16Cited by
76References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2004 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Jan 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0902
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner for electrophotography contains a binder resin, a charge control agent, and a colorant. The colorant is a black iron oxide compound containing 10 to 45% by weight of titanium component calculated in terms of Ti atom in relation to Fe atom when measured by wavelength dispersive X-ray fluorescence spectrometry. Peaks at Bragg angle 2θ of the toner to CuKα X-ray are peak A at 32.9 degrees ±0.3 degrees and peak B at 35.5 degrees ±0.3 degrees, and X ray intensity ratio between peaks A and B (A/B) is in the range of 0.3 to 2.0 at a scan speed of 0.5 to 4 degrees/min.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.