Image forming method featuring a residual charge control property resulting from a selected toner formulation
US5976755A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1998 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Apr 28, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/093
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming method includes charging an image carrier for carrying an electrostatic latent image; forming an electrostatic latent image on the charged image carrier; developing the electrostatic latent image with a toner by contacting a toner layer on a surface of a toner carrier with a surface of the image carrier to form a toner image thereon; copying the toner image formed on the surface of the image carrier onto a copy medium; wherein the toner has toner particles containing at least a bonding resin, carbon black and an azo-based iron compound and inorganic fine powder; the carbon black having an average primary particles size within a range of from 25 to 80 nm; and the azo-based iron compound having a specific structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.