Image forming apparatus and charge roller therefor
US6463237B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2001 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Jan 11, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0233
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a charge roller rotatable in contact with the surface of an image carrier to thereby charge the surface. The charged surface of the image carrier is exposed imagewise for forming a latent image. A developing device develops the latent image to thereby form a corresponding toner image. The toner image is transferred to a recording sheet. The charge roller is formed of a core and an elastic body affixed to the periphery of the core. Stearic acid to be added to rubber, which is the major component of the elastic body, is selected to be 1 wt % or less. An AC current value to be applied to the core is selected to be 1.1 mA or less. The image carrier is free from defective charging ascribable to impurities to deposit on the charge roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.