Color image forming apparatus and process cartridge therefor
US7340204B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2005 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | Mar 13, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0656
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color image forming apparatus including a first-color developing unit configured to form a toner image on the photoconductive belt; and a second-color developing unit and successive developing units, at least the second-color and successive developing units each include an electrostatic developing unit including, an electrostatic toner conveying device including a plurality of electrodes, and a toner feeding device configured to feed the toner to the electrostatic toner conveying device, wherein voltages applied to the plurality of electrodes form a traveling-wave electric field for electrostatically transferring the toner, an electric field for causing the toner to electrostatically move toward the latent image formed on the photoconductive belt is formed, and toners not moved toward the latent image are directly conveyed to the toner feeding device by the electrostatic toner conveying device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.