Process for producing carriers for developer
US4861694A · kind A · utility
5Cited by
2References
11Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 16, 1988 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Dec 16, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for producing carriers for a developer is disclosed, which comprises mixing and heating a carrier material containing a binder resin and a magnetic powder, and essentially free of solvent, to obtain a molten dispersion of the magnetic powder in the binder resin; spraying the molten dispersion into liquid droplets; and cooling the droplets to solidify the droplets into carrier particles. The process eliminates the use of solvents and produces carrier particles of superior toughness, surface smoothness, and sphericality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.