Developing device having surface microfields for an image forming apparatus
US5245391A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1992 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Apr 1, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/065
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device incorporated in an image forming apparatus and having a developing roller or similar image carrier for transporting a developer to a photoconductive element or similar image carrier to develop an electrostatic latent image formed on the image carrier. The developing roller is configured to form microfields on the surface thereof. An alternating voltage is applied to the developing roller as a bias voltage for development to thereby deposit a non-magnetic toner on the surface of the roller. Silica particles are admixed with the toner. The developing device is operable with an adequate developing bias at all times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.