Image forming method and apparatus
US6947692B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2003 |
| Grant date | Sep 20, 2005 |
| Priority date | — |
| Expiry date | Jan 21, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0921
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for developing an electrostatic latent image, including forming a magnet brush of a developer including a toner and a carrier on a developing sleeve including a main magnet and auxiliary magnets; and developing the electrostatic latent image with the magnet brush to form a toner image at a rubbing region, wherein the magnetic flux density in a normal line direction, half width, and attenuation ratio of the main magnet and the angle between the main magnet and auxiliary magnets are specified, and the magnetic sleeve has specific grooves thereon, and wherein the toner has a volume average particle diameter of from 4.0 to 7.0 μm, and includes fine particles having a circle equivalent diameter not greater than 2 μm in an amount not greater than 20% by number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.