Image reading apparatus and method of setting reading position

Details Image reading apparatus and method of setting reading position Image reading apparatus and method of setting reading position

2006-01-31

2006-01-31

Coles, Edward (Department: 2622)

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

C358S464000, C358S496000, C358S497000, C358S498000

Reexamination Certificate

active

06992800

ABSTRACT:
Disclosed is an image reading apparatus for moving a document reading unit to a point below a document feeder that feeds documents, and emitting light from a light source of the document reading unit toward a feed roller of the document feeder, whereby light reflected from a document that travels between the feed roller and the light source is sensed by the document feeding unit to thereby read an image on the document. The apparatus includes a photoelectronic converter for outputting an electric signal that conforms to amount of incident light, and a reading position setting unit for moving the document reading unit, irradiating the feed roller with light from the light source at each position to which the document reading unit is moved, causing the photoelectronic converter to output an electric signal that conforms to amount of light reflected from the feed roller at each position, detecting a range in a sub-scan direction over which this electric signal exceeds a predetermined threshold value, and setting a position at the center of this range as a reading position.

REFERENCES:
patent: 5245440 (1993-09-01), Sato
patent: 5289000 (1994-02-01), Toyofuku
patent: 5864408 (1999-01-01), Kumashiro
patent: 03-107275 (1991-05-01), None
patent: 06-046212 (1994-02-01), None
patent: 06-178054 (1994-06-01), None
patent: 09-107439 (1997-04-01), None
patent: 11-220625 (1999-08-01), None
Japanese Patent Office Office Action dated Jun. 10, 2005 corresponding to JPA 2000-373408.
English Language Abstract for 06-178054.
English Language Abstract for 03-107275.
English Language Abstract for 06-046212.
English Language Abstract for 11-220625.
English Language Abstract for 09-107439.

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