Developer comprising toner and/or carrier having specified average degree of roundness and specified standard deviation of degree of roundness
US6100000A · kind A · utility
12Cited by
7References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1999 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Apr 14, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08797
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to developer comprising a toner and/or a carrier; PA1 the toner comprising: PA2 toner particles comprising colored resin-particles containing at least a binder resin and a colorant, and inorganic fine particles fixed on the surface of the colored resin-particles, PA2 the toner particles having an average degree of roundness of not less than 0.960 and a standard deviation of degree of roundness of not more than 0.040; and carrier having an average degree of roundness of not less than 0.940 and a standard deviation of degree of roundness of not more than 0.055.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.