Duplex scanner capable of calibrating two-sided documents

Details Duplex scanner capable of calibrating two-sided documents Duplex scanner capable of calibrating two-sided documents

2005-11-22

2005-11-22

Williams, Kimberly (Department: 2626)

Facsimile and static presentation processing

Facsimile

Facsimile measuring, testing, or calibrating

C358S504000, C358S474000, C358S496000, C358S497000, C358S001900, C382S315000, C382S318000, C382S275000

Reexamination Certificate

active

06967749

ABSTRACT:
A duplex scanner capable of calibrating the two-sided documents comprises an automatic document feeder (ADF), an upper carriage and an upper calibration paper. The upper carriage is installed in the ADF and the upper calibration paper is installed under the upper carriage. Alternatively, the upper carriage is movable installed in the ADF while the upper calibration paper is fixed in the duplex scanner and corresponding to the upper carriage. Before image scanning, the relative motion between the upper carriage and the first calibration paper is generated for calibrating the light beam information. According to the invention, the effects of the contaminated upper calibration paper for the calibration of the light beam information can be reduced, and the quality of the scanning image is greatly enhanced.

REFERENCES:
patent: 4967233 (1990-10-01), Buchar et al.
patent: 5280368 (1994-01-01), Fullerton
patent: 6069715 (2000-05-01), Wang
patent: 6327047 (2001-12-01), Motamed
patent: 6344906 (2002-02-01), Gatto et al.
patent: 6694062 (2004-02-01), Yang

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