Charging device and an image forming apparatus using a charging device
US5548380A · kind A · utility
4Cited by
11References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1994 |
| Grant date | Aug 20, 1996 |
| Priority date | — |
| Expiry date | Dec 28, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0233
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charging device for charging a movable object to be charged. A charging member contacts the object to be charged. A power source applies a voltage to the charging member, wherein the power spectrum PS satisfies the following relation when the space frequency of the profile of the surface of the charging member is analyzed. In the section of 10.ltoreq.f.ltoreq.100 (cycles/mm): EQU PS.ltoreq.-2.5.times.log (f/2)(.mu.m.sup.2) In this way, the charging device prevents charge unevenness due to undulations on the surface of the charging member and charges uniformly while generating very little ozone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.