Image forming apparatus with cleaning device for removing remaining toner from outer surface of the intermediate transfer
US7751738B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2007 |
| Grant date | Jul 6, 2010 |
| Priority date | — |
| Expiry date | Jun 13, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/1661
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus has an image former to form a toner image on an image bearer. A primary transferer transfers the toner image from the image bearer to the outer surface of an intermediate transferer as primary transfer by applying a primary transfer bias. A secondary transferer transfers the toner image from the outer surface of the intermediate transferer to a sheet as secondary transfer by applying a secondary transfer bias. A cleaner cleans the toner residual on the surface of the intermediate transferer after the secondary transfer by applying a cleaning bias having a polarity opposite to electric charges of the toner. A controller causes the intermediate transferer to rotate continuously and causes the primary transferer to apply the primary transfer bias until a toner image forming area on the outer surface of the intermediate transferer passes the primary transferer after the secondary transfer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.