Dry developer for developing electrostatic latent images contains silica and titanium dioxide
US4623605A · kind A · utility
33Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1984 |
| Grant date | Nov 18, 1986 |
| Priority date | — |
| Expiry date | Dec 18, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09716
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A dry developer for developing electrostatic latent images comprises a positive charge type carrier and a negative charge type toner. The negative charge type toner includes, as after-treating agents, fine particles of hydrophobic silica in an amount of 0.05-1.0 percent by weight relative to the toner and fine particles of hydrophobic titanium oxide in an amount of 0.1-3.0 percent by weight relative to the toner, the fine particles of hydrophobic silica and the fine particles of hydrophobic titanium oxide being contained in a weight ratio of 1:5 to 1:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.