Closed air circulation toner rounding
US6991886B2 · kind B2 · utility
1Cited by
14References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2004 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Aug 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09725
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Toner is rounded by vigorously mixing less than about 5 percent by weight of particulate silica to the total weight of a starting toner in a closed, recirculating air system. The starting toner contains at least about 4.5 percent by weight of the starting toner of a wax and additionally contains at least 5 percent by weight of the starting toner of a softening agent. The temperature during the mixing is no more than 13 degrees C. above the onset of the glass transition temperature of the starting toner. The final toner comprises rounded starting toner having particulate silica embedded during the mixing process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.