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:
May. 08, 2007
Filed:
Jul. 29, 2004
Shintaro Yamada, Chiyoda, JP;
Akira Shimada, Hitachi, JP;
Tatsunari Sato, Tsuchiura, JP;
Nobuaki Fukasawa, Hitachi, JP;
Satoshi Narita, Hitachiota, JP;
Shintaro Yamada, Chiyoda, JP;
Akira Shimada, Hitachi, JP;
Tatsunari Sato, Tsuchiura, JP;
Nobuaki Fukasawa, Hitachi, JP;
Satoshi Narita, Hitachiota, JP;
Ricoh Printing Systems, Ltd., Tokyo, JP;
Abstract
An image forming apparatus is able to form steady test-pattern toner images for calibration of reflection density detection characteristics with ample toner. The operation consists of forming a test-pattern toner image for calibration of the reflection density detection characteristics, which is formed of a plurality of toner images of different colors aside from a reference test-pattern toner image for controlling image forming conditions, detecting the detection characteristics of a reflection density sensor from the result of detection of the quantity of toner attached to the test-pattern toner image for calibration of the reflection density detection characteristics, and calibrating the output characteristics of the reflection density sensor.