Image forming device with first and second transfer power sources
US10254684B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2018 |
| Grant date | Apr 9, 2019 |
| Priority date | — |
| Expiry date | Mar 9, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/1661
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming device includes an image carrier carrying an image, a transfer device including paired transfer members that transport the image carrier and a recording medium, a grounded guide member that guides the recording medium to a transfer region, and a transfer power source that produces an electric field in the transfer region causing the image to be transferred onto the recording medium. The transfer power source includes a first transfer power source that imparts a first transfer voltage to one of the paired transfer members, and a second transfer power source that, when the recording medium has a predetermined resistance value or less, or is of low resistance having a conductive layer along a medium substrate face, imparts a second transfer voltage of opposite polarity and having an absolute value less than or equal to the first transfer voltage to the other of the paired transfer members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.