JP2008259054A5

JP2008259054A5 -

Info

Publication number: JP2008259054A5
Application number: JP2007100914A
Authority: JP
Filing date: 2007-04-06
Publication date: 2010-05-20
Anticipated expiration: 2027-04-06

Claims

Conveying means for conveying an original;
First image reading means for reading the surface of the document conveyed by the conveying means ;
Second image reading means for reading the back side of the document conveyed by the conveying means through glass ;
Moving means for moving relative positions of the glass before and Symbol second image reading unit in the transport direction of the document,
When the second image reading unit detects an abnormal image due to dust when the glass is read, the moving unit moves the relative position between the second image reading unit and the glass, and the second image is read. A reading process for searching for a relative position with a low degree of abnormality due to dust adhering to the glass is performed by reading the glass by a reading unit, and a document is read by the second image reading unit at the searched relative position. Control means,
In the reading mode in which the control means reads a plurality of documents continuously conveyed by the conveying means using the first image reading means without using the second image reading means, the reading mode An image reading apparatus , wherein the search process is performed after the reading operation .

The reading mode is a single-sided reading mode in which one side of a document is read by the first image reading unit, or after the front side of the document is read by the first image reading unit, the document is reversed by the conveying unit and the back side of the document is 2. The image reading apparatus according to claim 1, wherein the image reading apparatus is in a document reversal reading mode read by the first image reading means.

Conveying means for conveying an original;
First image reading means for reading the surface of the document conveyed by the conveying means through a first glass;
A second image reading means for reading the back surface of the document conveyed by the conveying means through a second glass;
First moving means for moving relative positions of the first image reading means and the first glass in the document transport direction;
A second moving means for moving a relative position between the second image reading means and the second glass in the document conveying direction;
When the first image reading means detects an abnormal image due to dust when reading the first glass, the first moving means causes the relative position between the first image reading means and the first glass. A first search process for searching for a relative position with a low degree of abnormality due to dust adhering to the first glass by reading the first glass by the first image reading means, An original image is read by the first image reading unit at the relative position searched in the first search process, and an abnormal image due to dust is detected when the second image reading unit reads the second glass. In this case, the second moving means moves the relative position between the second image reading means and the second glass, and the second image reading means reads the second glass, thereby And performing a second search process for searching for a relative position with a low degree of abnormality due to dust adhering to the glass, and reading the document by the second image reading means at the relative position searched in the second search process. Control means to perform,
In the reading mode in which the control unit reads a plurality of documents continuously conveyed by the conveying unit using the first image reading unit without using the second image reading unit, the reading unit reads the document. An image reading apparatus , wherein the first search process is performed before an operation, and the first and second search processes are performed after a reading operation in the reading mode .

The reading mode is a single-sided reading mode in which one side of a document is read by the first image reading unit, or after the front side of the document is read by the first image reading unit, the document is reversed by the conveying unit, so 4. The image reading apparatus according to claim 3, wherein the image reading apparatus is in a document reversal reading mode read by the first image reading means .

In the double-sided reading mode for reading a plurality of documents continuously conveyed by the conveying unit using the first and second image reading units, the control unit performs the first reading before the document reading operation. 4. The image reading apparatus according to claim 3, wherein the second search process is performed, and the first and second search processes are performed after the reading operation in the reading mode .