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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.:

US 7432494 B1

PDFFull Text
Expired
Date of Patent:
Oct. 07, 2008

Filed:

Jun. 30, 2005

Color image forming apparatus and method of controlling the color image forming apparatus that efficiently perform position displacement detection operation and density detection operation

Applicant:

Yoshio Kanzaki, Tokyo, JP;

Inventor:

Yoshio Kanzaki, Tokyo, JP;

Assignee:

Ricoh Company Limited, Tokyo, JP;

Attorney:

Oblon, Spivak, McClelland, Maier & Neustadt, P.C.

Primary Examiner:

Georgia Y Epps

Assistant Examiner:

Don Williams

Int. Cl.
CPC ...
G01J 3/50 (2006.01); H01L 27/00 (2006.01); H01J 3/14 (2006.01); G03G 15/01 (2006.01); G03G 15/00 (2006.01); B41J 2/385 (2006.01);
U.S. Cl.
CPC ...
Abstract

A color image forming apparatus including tandem type image forming units that form images of different colors, respectively. The image forming units form test marks of different colors on a conveyor belt in its conveying direction at predetermined intervals. The test marks include linear position displacement detecting test marks and density detecting test marks. Each of the linear position displacement detecting test marks extends in a direction perpendicular to the conveying direction of the conveyor belt, and each of the density detecting test marks includes an area having a predetermined density and being adjacent to each of the linear position displacement detecting test marks. A detection operation for detecting position displacements of the linear position displacement detecting test marks in a sub-scanning direction of the conveyor belt and a detection operation for detecting densities of the density detecting test marks are performed, based on detection signals output from sensors.

Find Patent Forward Citations

Kanzaki, Yoshio. (2008). Color image forming apparatus and method of controlling the color image forming apparatus that efficiently perform position displacement detection operation and density detection operation (U.S. Patent No. 7432494). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7432494

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