Carrier for electrophotographic developer
US4871639A · kind A · utility
3Cited by
4References
10Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 17, 1987 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | Jun 17, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/10882
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A carrier for developer is disclosed, which is produced by a process including the steps of 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 resin; spraying the molten dispersion into droplets; and cooling the droplets to solidify the droplets into carrier particles. The carrier has excellent sphericality, high surface smoothness, and long life when used as a component of a two-component type developer in electrophotography.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.