Image forming apparatus with speed detector for detecting rotational speed of a tension roller
US7263321B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2006 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Jan 30, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/1623
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is an image forming apparatus, which comprises an intermediate transfer belt (15), and a plurality of image-forming units (11) to (14) disposed along the intermediate transfer belt (15) and adapted to form toner images of different colors and sequentially transfer the toner images onto the intermediate transfer belt (15) in a superimposed manner so as to form a color toner image. The intermediate transfer belt (15) is laid across a drive roller (16), a driven roller (17) and a tension roller (18), in a tensioned condition. A rotation speed of the tension roller (18) adapted to apply a tension to the intermediate transfer belt (15) is detected to obtain a linear speed of the intermediate transfer belt (15). In a process of color-misregistration correction, a write-start timing for each toner image of the colors is adjusted based on the linear speed of the intermediate transfer belt (15).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.