Charging device, and process cartridge and image forming apparatus using the charging device
US7139504B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2004 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Jun 20, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0225
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charging device including: a charging roller having a metal cylinder and an elastic layer located on the metal cylinder; a cleaner configured to clean the charging roller, which includes an electroconductive brush roller including a roller having a shaft; and hair located overlying the roller, wherein the hair includes a fiber which has a width of from 0.1 to 20 denier, and a length of from 0.3 to 2.5 mm and which is planted at a density of from 7,000 to 46,000 lines/cm2, and a member configured to impart substantially the same potential as that of the charging roller to the electroconductive brush roller when a bias voltage is applied to the charging roller. A process cartridge and an image forming apparatus including the charging device are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.