Method and apparatus for improving transcription quality in electrographical printers
US5526029A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 12, 1993 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Nov 12, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2217/0025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus for improving printing quality in electrographic printers includes an electrode device for generating a latent electrostatic charge pattern from electric signals. The electrode device is arranged within a gap area between a particle carrier and a back electrode. During a portion of the operating cycle, preferably when no development is performed, a duel airflow that is charged with positive and/or negative ions is directed into the gap area to neutralize the electrostatic attraction forces between the toner particles, and the electrode device and for achieving a homogeneous charge level on the surface layer of the electrode device. A magnet can be positioned opposite the electrode device so as to attract toner particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.