Developing roller and developing method thereof
US7505720B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2006 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Oct 24, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0617
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided are a developing roller for non-magnetic single component development and a developing method employing the developing, by which toner can be stably conveyed in any external environment, and the stable toner conveyance and charging amount can also be acquired. Also disclosed is a developing roller possessing a spindle and provided around an outer circumference of the spindle, at least an elastic layer (innermost layer), a resistance adjusting layer (intermediate layer) formed on the elastic layer and a surface layer (outermost layer) formed on the resistance adjusting layer, wherein the intermediate layer possesses a layer containing carbon black in a resin, a content of a polycyclic aromatic hydrocarbon in the carbon black is at most 10 ppm, and a volume resistance (Rv) of all the layers provided around the outer circumference of the spindle is 1.0×107−1.0×1013 Ω·cm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.