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:
Mar. 26, 2019
Filed:
Sep. 25, 2017
Masayoshi Nakayama, Ibaraki, JP;
Takuma Higa, Kanagawa, JP;
Masaki Sukesako, Kanagawa, JP;
Masashi Tachi, Kanagawa, JP;
Kazuaki Kamihara, Tokyo, JP;
Yuichi Aizawa, Kanagawa, JP;
Tomohide Takenaka, Kanagawa, JP;
Kohei Matsumoto, Kanagawa, JP;
Masayoshi Nakayama, Ibaraki, JP;
Takuma Higa, Kanagawa, JP;
Masaki Sukesako, Kanagawa, JP;
Masashi Tachi, Kanagawa, JP;
Kazuaki Kamihara, Tokyo, JP;
Yuichi Aizawa, Kanagawa, JP;
Tomohide Takenaka, Kanagawa, JP;
Kohei Matsumoto, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An electrophotographic image forming apparatus includes a latent image bearer to rotate and bear a latent image, a charging device to charge the a latent image bearer, a developing device to develop the latent image with developer including toner and use a developing voltage including an AC component, and a lubricant applicator to apply lubricant onto a surface of the latent image bearer. An amount of the lubricant applied by the lubricant applicator onto the latent image bearer per centimeter in an axial direction of the latent image bearer is equal to or greater than 0.845 mg for a running distance of 1.0 kilometer of the latent image bearer, and a difference between a largest value and a smallest value of the developing voltage is in a range of 200 V to 400 V.