Changing member having a charging surface arranged with respect to a tangent line
US5475471A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1992 |
| Grant date | Dec 12, 1995 |
| Priority date | — |
| Expiry date | Dec 30, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/183
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charging device, for use with an image forming apparatus with a detachable process cartridge, includes a movable member to be charged, and a charging member adjacent to the movable member. An oscillating voltage is applied to the charging member. The charging member includes a charging surface at the same side as the movable member. A tangent line extends from a point on the charging member, the point being the most downstream point in a moving direction of the movable member at a closest portion between the charging member and the image bearing member, toward the downstream side in the moving direction of the movable member. The charging device may include a first charging region and a second charging region provided at a downstream side from the first charging region, wherein a peak-to-peak voltage of unevenness in charging of a potential of the first charging region is greater than a peak-to-peak voltage of unevenness in charging of a potential of the second charging region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.