Imaging system including pre-transfer discharge
US5166734A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1991 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Feb 12, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/1605
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Imaging apparatus including an image forming surface, image forming apparatus for defining an electrostatic latent image on the image forming surface, the latent image having image portions and background portions, development apparatus for developing the electrostatic latent image in a reversal mode, using electrically charged pigmented toner particles to form a developed image overlying the image portions, whereby the developed image on the image forming surface is at a first electrical potential and the background portions on the image forming surface are at a second electrical potential, discharge apparatus for partially discharging the image forming surface so that the developed image is at a third electrical potential and the background portions are at a fourth potential and an image receiving surface at a fifth potential, for receiving the developed image from the image forming surface, wherein the difference between the fourth potential and the fifth potential is low enough such that substantially no electrical discharge occurs between the image receiving surface and the background portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.