Contact charging device for charging a surface to a given potential and image forming apparatus using the same
US5585897A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1995 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Mar 24, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0216
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed herein is a contact charging device for uniformly charging a moving subject surface to a given potential by bringing a charging member to which a voltage is applied into contact with the moving subject surface. The charging member has a brush structure formed by closely setting a plurality of conductive bristle members into a conductive base member. The charging member is positioned so that the amount of engagement of the conductive bristle members with the subject surface is large on the upstream side of a surface moving direction of the subject surface and small on the downstream side of the surface moving direction. Accordingly, the adhesion of all the conductive bristle members to the subject surface can be enhanced and the deformation of all the conductive bristle members can be prevented. Further, the springing phenomenon of the conductive bristle members on the upstream side having a high charging efficiency can be eliminated. As a result, the subject surface can be charged uniformly and stably.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.