Automatic document feeder and image forming apparatus including the same
US8800990B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2011 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Apr 21, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/193
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An automatic document feeder includes an upstream conveyance roller pair disposed upstream of an image reader including an upstream driving roller and an upstream driven roller; a downstream conveyance roller pair including a downstream driving roller and a downstream driven roller; an upstream auxiliary roller pair including upstream auxiliary rollers disposed coaxially on a shaft of the upstream driving roller and of the upstream driven roller, respectively, each formed of an elastic member and having a diameter greater than that of the adjacent upstream driving roller and of the adjacent upstream driven roller, respectively; and a downstream auxiliary roller pair including downstream auxiliary rollers each disposed coaxially on a shaft of the downstream driving roller and of the downstream driven roller, formed of a low-hardness elastic member and having a diameter greater than that of the adjacent downstream driving roller and of the adjacent downstream driven roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.