Toner
US7160663B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2004 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | Dec 11, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09708
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner includes toner particles and an inorganic fine powder mixed with the toner particles. The toner particles contain a binder resin, a coloring agent, a releasing agent, and a sulfur-containing resin. The toner particles contain at least one element selected from the group consisting of magnesium, calcium, barium, zinc, aluminum, and phosphorus and satisfy the relationship:4≦T/S≦30wherein T represents the total content of the element in ppm, and S represents the content of sulfur in ppm. The weight-average particle diameter (D4) of the toner is in the range of 3 to 10 μm. The average circularity of the toner is within the range of 0.950 to 0.995.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.