Dry electrostatographic toner composition comprising well defined inorganic particles
US6093516A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1993 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Sep 29, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09716
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a toner composition consisting of fusible electrostatically attractable toner particles suitable for development of electrostatic charge patterns. According to the invention, dry electrostatographic toner particles suitable for use in the development of an electrostatic charge pattern and having a particle size distribution showing more than about 80 percent by volume of the toner particles with equivalent particle size diameter of less than about 10 .mu.m are provided wherein: PA1 (i) the toner particles are blended with fine inorganic microparticles in a concentration of at least 0.1% w/w and at most 5% w/w, the said fine inorganic microparticles being characterized by a product of BET surface (A) in m.sup.2 /g times the methanol value (B) fulfilling the relation: PA2 A.times.B>10,000 PA1 (ii) and the ratio of the apparent density over the bulk density of the toner particles satisfies the relation: ##EQU1##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.