The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2011
Filed:
Mar. 04, 2008
Applicant:
Yoshinobu Kagami, Kanagawa, JP;
Inventor:
Yoshinobu Kagami, Kanagawa, JP;
Assignee:
Ricoh Company Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04N 1/04 (2006.01); H04N 1/38 (2006.01); H04N 1/40 (2006.01);
U.S. Cl.
CPC ...
Abstract
An image reading device feeds a document original along a sub-scanning direction over an exposure glass. A moving unit moves to and fro in the sub-scanning direction over the exposure glass thereby causing an image reading position on the exposure glass to move. A line image sensor reads one line of an image of the document original at the image reading position in a main scanning direction, while the moving unit is moving, thereby obtaining image. A dirt determining unit determines that there is dirt on the exposure glass when a straight line appears in the main scanning direction in the image data.