Toner for developing electrostatic latent image
US6022661A · kind A · utility
28Cited by
13References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1999 |
| Grant date | Feb 8, 2000 |
| Priority date | — |
| Expiry date | Apr 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09725
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a toner, comprising; PA1 toner particles containing at least a binder resin and a colorant, and having an average degree of roundness from 0.960 to 1.0 and a standard deviation of degree of roundness of not more than 0.040; and PA1 silica particles having an average primary particle size of 16 to 28 nm, in which the number of particles (A) that are less than 15 nm in particle size, the number of particles (B) that are between 15 and 30 nm in particle size and the number of particles (C) that are larger than 30 nm is in relation of B/A>4 and B/C>4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.