Developing device
US9733594B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2016 |
| Grant date | Aug 15, 2017 |
| Priority date | — |
| Expiry date | Aug 9, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0818
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device includes a developing container, a developing sleeve, a magnet and grooves provided at a surface of the sleeve and formed along a direction crossing a circumferential direction of the sleeve. In a cross-section, each of the grooves is formed by a flat bottom portion contacting a carrier particle and a pair of side surface portions provided in both sides of the flat bottom portion with respect to the circumferential direction of the sleeve and satisfies the following relationship:r<w<2r, 2×r<L, andr/2≦s<2r. In the above, r is a volume-average particle size of the carrier particles, w is a length of the flat bottom portion, L is a width between the side surface portions at the surface of the sleeve, and s is a depth of each of the grooves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.