Developing assembly, process cartridge and image-forming method
US6924076B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2002 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Nov 4, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/183
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a developing assembly, a process cartridge and an image-forming method, a specific developer and a specific developer-carrying member are used in combination. The developer comprises toner particles containing at least a binder resin and a colorant, and conductive fine particles; the toner particles having a Circularity a of less than 0.970 as found from the following expression:Circularity a=L0/Lwhere L0 represents the circumferential length of a circle having the same projected area as a particle image, and L represents the circumferential length of a projected image of a particle.The developer-carrying member has at least a substrate and a resin coat layer formed on the substrate; the resin coat layer containing at least a coat layer binder resin and a positively chargeable material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.