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:
Jul. 04, 2017
Filed:
Jan. 15, 2016
Yasuhiro Maehata, Tokyo, JP;
Nobuo Kuwabara, Kanagawa, JP;
Kenji Honjoh, Kanagawa, JP;
Yasuhito Kuboshima, Tokyo, JP;
Yusuke Ishizuka, Kanagawa, JP;
Takeshi Shintani, Kanagawa, JP;
Yasuhiro Maehata, Tokyo, JP;
Nobuo Kuwabara, Kanagawa, JP;
Kenji Honjoh, Kanagawa, JP;
Yasuhito Kuboshima, Tokyo, JP;
Yusuke Ishizuka, Kanagawa, JP;
Takeshi Shintani, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes a process cartridge that includes an image bearer including a rotary shaft and rotates about the rotary shaft; a charger to charge a surface of the image bearer; and a developing device to develop an electrostatic latent image formed on the image bearer into a visible toner image. The charger includes a charging roller that rotates about a shaft together with the image bearer during image formation and electrically charges a surface of the image bearer. A surface linear speed of the charging roller is made slower than a surface linear speed of the image bearer. The image forming apparatus includes a charging roller controller that switches the rotational speed of the charging roller to a first rotational speed slower than the linear speed of the image bearer and a second rotational speed identical to the linear speed of the image bearer.