Image forming apparatus and method for detecting separated state of transfer member
US7840148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2007 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Sep 24, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/1614
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a secondary transfer roller that becomes a pressed state to make an intermediate transfer belt perform a transfer process and can move between the pressed state and a separated state, a press and separation driving device for driving the secondary transfer roller to become the pressed state and the separated state, a press and separation detecting device for detecting a pressed or separated state, and a voltage applying portion for applying a voltage between the intermediate transfer belt and the secondary transfer roller. The press and separation detecting device includes a resistor for detecting a current and a determination portion for determining a pressed or separated state in accordance with the detected current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.