Image forming apparatus with two cleaning electric fields for transferring developer from a developer charging device onto an image bearing member
US6987939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2003 |
| Grant date | Jan 17, 2006 |
| Priority date | — |
| Expiry date | Feb 12, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/0005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes an image bearing member; a charging device for electrically charging the image bearing member at a contact position; a transferring device for transferring a developed image on the image bearing member onto a transfer material; and a developer charging device for electrically charging a developer remaining on the image bearing member after the image is transferred. The developer charging device is disposed downstream of the transferring device and upstream of the charging device with respect to a moving direction of the image bearing member. An electric field forming device forms a cleaning electric field in a direction of transferring the developer from the developer charging device onto a predetermined region of the image bearing member and forms a cleaning electric field for transferring the developer from the charging device onto the image bearing member after the predetermined region passes through the contact portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.