Image forming apparatus
US9395658B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2015 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Dec 8, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/1675
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a belt-shaped image bearer; a transfer device disposed opposing to the image bearer; an opposed device disposed opposing to the transfer device; and a transfer bias power source. The image bearer is disposed along an outer circumferential surface of the transfer device at least one of an upstream side and a downstream side of the transfer portion in a direction of conveyance of the recording medium. The transfer bias power source cyclically alternates the transfer bias applied to the transfer portion, between a transfer directional bias in a transfer direction to transfer the toner image from the image bearer onto the recording medium and a reverse directional bias in a reverse direction of the transfer direction. The transfer bias power source applies the reverse directional bias during a time period longer than 50% of one cycle of the applied transfer bias in the one cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.