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. 24, 2020
Filed:
Aug. 14, 2018
Masashi Tachi, Kanagawa, JP;
Takuma Higa, Kanagawa, JP;
Masayoshi Nakayama, Ibaraki, JP;
Masaki Sukesako, Kanagawa, JP;
Tomohide Takenaka, Kanagawa, JP;
Yuichi Aizawa, Kanagawa, JP;
Kazuaki Kamihara, Tokyo, JP;
Keita Sone, Tokyo, JP;
Masashi Tachi, Kanagawa, JP;
Takuma Higa, Kanagawa, JP;
Masayoshi Nakayama, Ibaraki, JP;
Masaki Sukesako, Kanagawa, JP;
Tomohide Takenaka, Kanagawa, JP;
Yuichi Aizawa, Kanagawa, JP;
Kazuaki Kamihara, Tokyo, JP;
Keita Sone, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes a latent image bearer to bear a latent image, a potential sensor having a vibrator driven by a drive frequency to detect a surface potential of the latent image bearer, a developer bearer to bear developer that develops the latent image on the latent image bearer, and a power supply to apply a superimposed voltage obtained by superimposing an alternating voltage on a direct current voltage on the developer bearer. The frequency of the alternating voltage is not a multiple of the drive frequency and is a value obtained by adding a predetermined value to a multiple of the driving frequency.