Image forming method and image forming apparatus
US7090956B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2001 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Dec 26, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0648
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an image forming method, when viewed from the moving direction of a photosensitive body 1, there is disposed, on the upstream side, a first developing roller 61 opposed to and adjacent to the photosensitive body 1 and rotatable in the opposite direction to the photosensitive body 1, while the peripheral speed ratio of the roller 61 to the photosensitive body 1 ranges from 0.8 to 2.0; on the downstream side of the roller 61, there is disposed a second developing roller 62 rotatable in the same direction to the photosensitive body 1, while the peripheral speed ratio of the roller 62 to the photosensitive body 1 ranges from 1.05 to 2.0; and the shape coefficient SF1 of the toners of two-component developing agent ranges from 120 to 170, while the shape coefficient SF2 ranges from 110 to 130.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.