Developing apparatus using a developer carrier capable of forming microfields on the surface thereof
US5286918A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1991 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | Jun 14, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0818
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing apparatus having a rotatable toner carrier for transporting a toner to a developing region where it faces an image carrier on which a latent image has been electrostatically formed. The surface of the toner carrier is constituted by a mixture of conductive surface portions and dielectric surface portions and selectively holds a charge to form microfields. The toner having been charged is electrostatically deposited on the toner carrier by the microfields and transported to the developing region as the toner carrier moves. In the developing region where the toner carrier and the image carrier face each other while defining a developing gap therebetween, the toner electrostatically flies from the toner carrier to the latent image formed on the image carrier to thereby develop it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.