Developer member adapted for depositing developer material on an imaging surface
US6775504B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2002 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Dec 21, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a development system including a developer transport adapted for depositing developer material on an imaging surface having an electrostatic latent image thereon, including: a housing defining a chamber storing a supply of developer material including carrier and toner; a donor member, mounted partially in the chamber and spaced from the imaging surface, for transporting developer on an outer surface thereof to a region opposed from the imaging surface the donor member having a magnetic assembly having a plurality of poles, a sleeve, enclosing the magnetic assembly, rotating about the magnetic assembly; the magnetic assembly generating a developer bed having a predefined developer bed height; a grid, interposed between the donor roll and the imaging surface within the predefined bed height, the grid having apertures for permitting carrier and toner therethrough; and means for biasing a region between the grid and the imaging surface at a voltage potential so that toner is ejecting towards the imaging surface after toner passes the apertures of the grid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.