Charging device, process cartridge, image forming apparatus, and toner
US8000627B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2005 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Feb 26, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0225
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a charging device which comprises a charging roller (14a) and a cleaning component (14b). The charging roller charges a surface of an image-recording medium (11) with a voltage which is applied from an external source. The cleaning component cleans a surface of the charging roller. The charging roller includes a resistance adjustment layer which is made of a resin composite and formed on an outer periphery of a core metal. The hardness of the charging roller is 45 degrees or more in JIS D hardness. The cleaning component has a portion which is in contact with the charging roller. This portion is made of resin foam which has a continuous foam structure. The density of the resin foam is 5 to 15 kg/m3 and its tensile strength is 1.7±0.5 kg/cm2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.