Charging device, process cartridge and image forming apparatus
US5546167A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1994 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Jul 1, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0208
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charging member has a charging surface having a concave surface that is positioned on the opposite side of a line H than a side at which an object to be charged is disposed, wherein H is a line that (i) is tangent to a surface of the object to be charged at a point at a downstream end of a contact section or a closest-proximity section between the charging surface and the object to be charged, and (ii) extends downstream from the point of tangency, where the downstream direction is determined with respect to a direction of movement of the object to be charged. By this arrangement, a charging region can be enlarged and periodic fluctuations in a surface potential of the object to be charged can be mitigated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.