Method of producing toner for developing latent electrostatic images
US6368765B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2001 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Jan 22, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of producing a toner for developing latent electrostatic images includes the steps of preliminarily grinding a toner composition having at least a binder resin and a coloring agent to prepare a preliminarily ground product, and finely pulverizing the preliminarily ground product using a pulverizer to produce toner particles, wherein the preliminarily ground product satisfies conditions (1) and (2):Dv≧D10  (1) D50<3D10  (2) wherein Dv is a weight mean diameter of the preliminarily ground product, D10 is a weight mean diameter when the cumulative number of particles reaches 10% at measurement of a cumulative particle distribution, and D50 is a weight mean diameter when the cumulative number of particles reaches 50% at measurement of the cumulative particle distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.