Magnetic toner for electrostatic latent image development
US8980515B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2013 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Aug 8, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09392
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A magnetic toner for electrostatic latent image development includes toner particles containing toner core particle containing at least a binder resin and a magnetic powder, and a shell layer coating the toner core particle. In the toner, in the case where the surfaces of the shell layers are observed using a scanning electron microscope, the magnetic powder is not observed, and approximately spherical particles derived from the resin fine particles are not observed on the surfaces of the shell layers for toner particles having a particle diameter in a specific range. In the toner, in the case where the cross-sectional surfaces of the toner particles are observed using a transmission electron microscope, cracks approximately perpendicular to surfaces of the toner core particles are observed inside the shell layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.