Image scanning apparatus and image scanner
US7753365B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2008 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Oct 11, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0081
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an image scanning apparatus, when documents on a document tray are sequentially transferred, different control steps are performed according to a scanning speed when an upper surface height of the documents is lowered thereby turning off a height detection sensor. In a first control mode, which is not a high speed scanning, the document tray is elevated little by little during an inter-transfer time between each time one document is transferred until the upper surface height reaches a target height that is higher by a predetermined distance since the height detection sensor is turned on. In a second control mode, in which high speed scanning is performed, the document tray is elevated little by little during the inter-transfer time each time the one document is transferred until the upper surface height reaches a height that is higher by a predetermined distance than a height at a time when the height detection sensor is turned off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.