Developer holding member, development device, process cartridge, image forming apparatus and method of manufacturing hollow body
US7664441B2 · kind B2 · utility
2Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2007 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Dec 26, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49771
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developer holding member includes a magnetic field generating device and a hollow body including the magnetic field generating device thereinside, and attracting a developer to an external surface thereof with magnetic force of the magnetic field generating device. The external surface of the hollow body is randomly provided with a large number of depressions, and a peak intensity of a spectrum within a range of wavelengths not more than 1 mm, which is figured out by performing a frequency analysis using a profile curve in a circumferential direction of the external surface, is not more than 12.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.