Sheet-fed scanning device using a sheet-feeding power source for calibration
US7379216B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 2, 2005 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Nov 25, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0448
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sheet-fed scanning device includes a scanning module, a sheet-feeding module, a driving module, a calibration sheet moving module, and a calibration sheet. The sheet-feeding module transports a document across a scan region, in which the scanning module scans the document. The driving module drives the sheet-feeding module and the calibration sheet moving module. The calibration sheet is moved to the scan region before the document is transported, is gradually moved away from the scan region as the document is being transported so that the scanning module scans a plurality of scan lines on the calibration sheet for calibration, and is moved completely out of the scan region when the document reaches the scan region, such that the scanning module scans the document thereafter. The calibration sheet cannot be moved back to the scan region until the driving module reverses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.