Electrostatic color printing utilizing discrete potentials
US4068938A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1975 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Jun 16, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus in which an electrostatic latent image is developed simultaneously in two colors. A first portion of the latent image has a potential greater than a first threshold with a second portion thereof having a potential less than a second threshold. The second threshold is less than the first threshold. Particles of a first color are applied to the first portion of the latent image with particles of a second color being applied to the second portion of the latent image. The electrostatic latent image is discharged to a potential less than the second potential and portions thereof having a potential greater than the second threshold by a pre-selected level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.