Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Reexamination Certificate
2008-05-27
2008-05-27
Lee, Cheukfan (Department: 2625)
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
C358S496000, C358S406000, C358S498000
Reexamination Certificate
active
11217331
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.
REFERENCES:
patent: 5280368 (1994-01-01), Fullerton
patent: 6947187 (2005-09-01), Mui et al.
patent: 2004/0179242 (2004-09-01), Nakaya
patent: 2005/0179959 (2005-08-01), Lien
patent: 2006/0250665 (2006-11-01), Chen
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