Apparatus and method for detecting the presence of a page in an image scanner
US6643037B1 · kind B1 · utility
3Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1999 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Sep 20, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/193
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image scanner is provided that includes a transparent platen for supporting a page during a scanning operation, an automatic document feeder and an apparatus for detecting if the page is present on the platen. The apparatus includes an indicium positioned above a predetermined area on the platen. In order to determine if a page is present on the platen, the predetermined area is scanned. If the indicium can be detected, then it is assumed that a page is not present on the platen. If, however, the indicium is not detected, then it is assumed that a page is present on the platen and the user may then be notified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.