Image forming apparatus for forming an electrostatic latent image
US6750891B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2002 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Sep 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/183
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an image forming apparatus of the present invention, the voltage of a chargeable layer 2b of an image carrier 2 at the portion to be in contact with writing electrodes 3b is adjusted by a surface potential adjusting member 8 which is disposed to be in contact with the chargeable layer 2b between the writing electrodes 3b and a transfer roller 6a. That is, even if the reverse charge injection occurs because the transfer voltage is applied to the transfer roller 6a and the transfer roller 6a is in contact with the chargeable layer 2b of the image carrier 2 at an interval between a printed paper 5 and the next paper 5, the potential of the chargeable layer 2b at the portion to be in contact with the writing electrodes 3b is adjusted not to exceed the withstand voltage of IC drivers 7 of the writing electrodes 3b by the surface potential adjusting member 8. Therefore, this prevents the writing head 3 from being broken, prevents the production of ghost image, and further inhibits voltage drop due to discharge between the image carrier and the writing electrodes during the process of writing a latent image, thereby preventing the electrostatic latent image from being in disorder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.