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:
Feb. 07, 2012
Filed:
Sep. 05, 2008
Tetsuya Sakai, Toyokawa, JP;
Soh Hirota, Hoi-gun, JP;
Masahiro Kouzaki, Toyohashi, JP;
Takashi Harashima, Toyokawa, JP;
Kazuomi Sakatani, Toyokawa, JP;
Tetsuya Sakai, Toyokawa, JP;
Soh Hirota, Hoi-gun, JP;
Masahiro Kouzaki, Toyohashi, JP;
Takashi Harashima, Toyokawa, JP;
Kazuomi Sakatani, Toyokawa, JP;
Konica Minolta Business Technologies, Inc., Chiyoda-ku, Tokyo, JP;
Abstract
The present invention aims to provide an image forming apparatus and the like that perform a highly-accurate tone correction in a relatively short time and includes the following: a pattern former, with use of each image forming unit, on a sheet, forming tone patches in the main or sub scanning direction () and aligning markers, which indicate positions of the tone patches, in the same direction as the tone patches (); a pattern reader reading the sheet with the tone patches and markers formed thereon; a coordinate determiner determining coordinates of the tone patches in the direction of the aligned tone patches based on the read markers (); a density determiner determining densities of the tone patches () read based on the determined coordinates; and an updating part updating the tone correction table based on relationships between the determined densities and tone levels.