Xerographic developer unit having multiple magnetic brush rolls rotating with the photoreceptor
US7406279B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2005 |
| Grant date | Jul 29, 2008 |
| Priority date | — |
| Expiry date | Sep 27, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0935
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A development subsystem is used to develop toner particles transported by semiconductive carrier particles. The development subsystem includes a developer housing for retaining a quantity of developer having semiconductive carrier particles and toner particles, a first magnetic roll having a stationary core with at least one magnet and a sleeve that rotates about the stationary core of the first magnetic roll, a second magnetic roll having a stationary core with at least one magnet and a sleeve that rotates about the stationary core of the second magnetic roll, a motor coupled to the first and the second magnetic rolls to drive the rotating sleeves of the first and the second magnetic rolls at different velocities relative to a velocity for a photoreceptor that rotates in proximity to the first and second magnetic rolls, the first and second magnetic rolls being driven in a direction that is with the direction of rotation of the photoreceptor so that the first and the second magnetic rolls carry semiconductive carrier particles and toner particles through a development zone formed by the first and the second magnetic rolls that is proximate to the photoreceptor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.