Image forming apparatus
US9261841B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2014 |
| Grant date | Feb 16, 2016 |
| Priority date | — |
| Expiry date | Jan 23, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0161
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus forms decision registration mark for deciding whether or not a color registration correction for correcting color shifts in the color image carries out on an intermediate transfer belt. The decision registration mark is formed by registering four color registration marks. Color registration sensors detect a detection width of the decision registration mark along a sub scanning direction. A control portion receives the detection width of the decision registration mark and decides whether or not the color registration correction carries out based on whether or not the detection width of the decision mark detected by the detection portion exceeds the period of reference time. When the detection width of the decision mark detected by the detection portion exceeds the period of reference time, the control portion carries out the color registration correction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.