Liquid developer formulation
US4980259A · kind A · utility
10Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1989 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Jan 26, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for replenishing a liquid developer, and a liquid developer made by the process, comprising transferring a first composition comprising a carrier liquid and a charge director into the liquid developer and transferring a second composition comprising toner particles, carrier liquid and charge director into the liquid developer. The amount of charge director in each of the first and second compositions charge director is in a predetermined ratio which results in a constant level of charge director in the liquid developer when the liquid developer is utilized in an electrostatic or printing process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.