Developer for developing electrostatic latent image and image forming method
US4868084A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1987 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Dec 1, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09716
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developer for developing electrostatic latent images comprises negatively chargeable toner particles and hydrophobic, negatively chargeable silica fine power, PA0 said silica fine powder being obtained by treating silica fine powder with a silane coupling agent represented by the following formula: EQU RmSiYn or Y.sub.3 --Si--NH--Si--Y.sub.3 PA0 and treating further said treated silica fine powder with a silicone oil having the structure: ##STR1## An image forming method comprises forming an electrostatic latent image on a photosensitive drum; developing said latent image with a developer to form toner images, said developer comprising negatively chargeable toner particles and, hydrophobic, negatively chargeable silica fine powder, PA0 said silica fine powder being obtained by treating silica fine powder with a silane coupling agent represented by the following formula: EQU RmSiYn or Y.sub.3 --Si--NH--Si--Y.sub.3 PA0 and treating further said treated silica fine powder with a silicone oil having the structure: ##STR2## electrostatically transferring the toner images formed to a transfer material; and cleaning the photosensitive drum after electrostatic transfer with a blade clean…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.