Tandem color image forming apparatus with an image transfer belt and backup roller
US7174124B2 · kind B2 · utility
14Cited by
21References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2003 |
| Grant date | Feb 6, 2007 |
| Priority date | — |
| Expiry date | Jan 2, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0131
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus of the present invention disclosed is of the type sequentially transferring toner images from a plurality of photoconductive drums to a sheet being conveyed by an image transfer belt or an intermediate image transfer belt one above the other with bias applying members to thereby form a composite color image. Backup rollers, contacting the inside surface of the belt, each have volumetric resistivity of 109 Ω·cm or above and ten-point mean surface roughness Rz of 6 μm or above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.