Apparatus for image forming and charging capable of effectively maintaining a charge potential
US6449449B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 2000 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Jul 19, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0233
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charging apparatus for use in an image forming apparatus includes a charge roller configured to adjoin to a photoconductive member to provide a charge to a surface of the photoconductive member. The charge roller includes a plurality of roller layers. One of the plurality of roller layers has a resistance ratio with which a roller surface potential is raised by a charge movement. In this case, the resistance ratio has a value such that a time period in which a charge moves within the one of the plurality of roller layers is sufficiently smaller than a time period in which an arbitrary point of the surface of the charge roller moves across a discharge region formed between the charge roller and the photoconductive member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.