Electrophotographic liquid developer with charge director
US5308729A · kind A · utility
4Cited by
13References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1992 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Apr 30, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1355
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid toner having a mineral oil vehicle, a blend of Surlyn ionomeric resin and Nucrel resin, pigment and, as charge director, lecithin, N-methyl-2-pyrrolidone and calcium Petronate. The charge director optimizes speed of recovery of charge properties during continual use. The mineral oil does not vaporize well and is readily condensed, thus permitting use as a confined toner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.