Contactable charging type charging device for image formation apparatus, and method of manufacturing the same
US7123861B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 2002 |
| Grant date | Oct 17, 2006 |
| Priority date | — |
| Expiry date | Nov 20, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0233
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charging device charging a photosensitive medium of an image formation apparatus while being in contact with the photosensitive medium, supports both ends of a charging member having a plate-shaped elastic member by a support member, so that the charging member has a semicircular section. A curved surface of the charging member contacts a surface of the photosensitive medium to maintain a predetermined contact nip and a contact linear pressure. The charging device controls a total resistance by adjusting a material, a thickness, a contact area, and a radius of the charging member, and maintains the contact linear pressure and the contact nip from the photosensitive medium. As a result, the charging device can easily adjust an electric resistance, minimizing variations of the contact linear pressure and the contact nip, material and processing expenses can be cut down, and productivity of the charging device is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.