Document sensing device for an image forming apparatus
US6252682A · kind A · utility
10Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 1998 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | May 1, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00329
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A document sensing device for an image forming apparatus of the present invention is capable of sensing a document stably without being influenced by disturbing light, e.g., light ascribable to fluorescent lamps or similar illuminators illuminating a room. According to one aspect of die invention, optical elements are held by a jig rotatable about an optical axis. According to another aspect of the invention, a light receiving means or a photosensor means has at least four light-sensitive regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.