Toner for developing latent electrostatic images
US4950573A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1987 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Nov 17, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08773
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner for developing latent electrostatic images is disclosed, which comprises (a) thermofusible base particles A having a softening point of 80.degree. C. or less, a flow starting temperature of 110.degree. C. or less, and an average particle size of 5 to 25 .mu.m, and (b) small particles B comprising as the main component an organic polymeric material having a softening point at least 5.degree. C. higher than the softening point of the base particles A and no practical softening point, and an average particle size ranging from 0.1 .mu.m or more, but not more than 1/4 of the average particle size of the base particles A, which small particles B are embedded in the surface of the base particles A so as to cover the surface of the base particles A to a depth of less than the particle size of the small particles B.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.