Electrophoretic development of electrostatic charge images
US4761357A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1987 |
| Grant date | Aug 2, 1988 |
| Priority date | — |
| Expiry date | Mar 25, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/101
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Electrophoretic process and apparatus for developing an electrostatic charge pattern carried by a dielectric surface by progressively moving that surface through a development station and simultaneously progressively advancing a layer of liquid toner (11) comprised of toner particles dispersed in a carrier liquid, through that station in proximity to said charge-carrying surface, (3), and imposing an electric field bias to cause or promote selective image-wise movement of toner particles through said liquid at said development station and deposition thereof on said charge-carrying surface in a pattern representing said electrostatic charge pattern, wherein said layer of liquid toner contains toner particles in a concentration of from 2 to 25% by weight, and including the step of applying a film of a substantially toner-free non-polar liquid which is miscible with the carrier liquid of said liquid toner and which has a specific conductivity lower than 0.2 nS/m over said liquid toner layer (11) in such manner and at such a rate that each increment of such toner layer arrives at the development station, substantially free from turbulence and covered by the film of substantially toner-…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.