Liquid developer method with replenishment of charge director
US5155001A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1991 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Aug 5, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G13/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid developer system contains electrically charged toner particles that are applied to a surface having a latent electrostatic image thereon for developing the image. The liquid developer system includes an insulating non-polar carrier liquid, toner particles dispersed in the carrier liquid, and at least one charge director compound that is only partially soluble in the carrier liquid. The charge director compound is supplied in solid form to the carrier liquid in excess of the amount that achieves saturation concentration. As a result, the compound is in equilibrium contact with the carrier liquid and maintains a predetermined concentration of dissolved charge director in the liquid developer system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.