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:
Oct. 15, 2024
Filed:
Oct. 13, 2022
Kanji Ubukata, Kanagawa, JP;
Koji Kiryu, Tokyo, JP;
Masashi Kasamai, Kanagawa, JP;
Jumpei Yamaguchi, Kanagawa, JP;
Masahiro Ashikawa, Kanagawa, JP;
Nagisa Nakamura, Shizuoka, JP;
Kanji Ubukata, Kanagawa, JP;
Koji Kiryu, Tokyo, JP;
Masashi Kasamai, Kanagawa, JP;
Jumpei Yamaguchi, Kanagawa, JP;
Masahiro Ashikawa, Kanagawa, JP;
Nagisa Nakamura, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A control device includes circuitry. The circuitry detects density unevenness of a toner image occurring according to a rotation cycle of a plurality of image bearers based on rotation phases and toner image density of the plurality of image bearers, controls rotation phases and rotation speeds of the plurality of image bearers, corrects the rotation phases and the rotation speeds of the plurality of image bearers, controls the rotation speeds of at least two of the plurality of image bearers to be a specified rotation speed, and starts a detection operation of the rotation phases of the plurality of image bearers after a difference between each of the rotation speeds of the at least two of the plurality of image bearers and the specified rotation speed falls within a specified range.