Image forming apparatus having a primary transfer unit, a secondary transfer unit, and a direct transfer unit
US8712299B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2011 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Oct 1, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0161
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes: a first image carrier; a first image forming unit that forms an image; an intermediate transfer belt; a primary transfer unit that primarily transfers the image onto the intermediate transfer belt; a secondary transfer unit that secondarily transfers the image transferred further onto a recording medium; a second image carrier that transfers the image onto the recording medium; a second image forming unit that forms an image on the second image carrier; a direct transfer unit that directly transfers the image onto the recording medium; a recording medium carriage belt, and a driving roller that drives the recording medium carriage belt; a speed fluctuation detecting unit; and a drive control unit that controls driving of the driving roller so as to reduce the cyclic speed fluctuation of the carriage belt based on a detection result of the speed fluctuation detecting unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.