Imaging apparatus, and toner and process cartridge used in the imaging apparatus
US7050741B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2004 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Jun 14, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/0035
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging apparatus that is capable of realizing good cleaning characteristics and transfer characteristics, and obtaining a high quality image using toner having a high average roundness is provided. The imaging apparatus includes an image carrier, a charge unit, a developing unit, a transfer unit, and a cleaning unit. The transfer unit may directly transfer a toner image onto a recording medium that is carried by a transfer belt, or transfer the toner image onto the transfer belt first to then transfer the toner image onto the recording medium from the transfer belt. The cleaning unit includes a cleaning blade and a brush roller. The toner used in the imaging apparatus has an average roundness Ψ within a range of 0.93˜0.99, and a friction coefficient μs of the image carrier satisfies a condition, friction coefficient μs≦3.6−3.3×average roundness Ψ.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.