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:
Dec. 01, 2015
Filed:
Aug. 27, 2014
Masahide Yamashita, Tokyo, JP;
Mayumi Yoshihara, Kanagawa, JP;
Masahide Yamashita, Tokyo, JP;
Mayumi Yoshihara, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
An image forming apparatus includes an electrophotographic photoreceptor that bears a latent image, an electrostatic charging unit that negatively charges the electrophotographic photoreceptor uniformly with electricity, and a latent image writing unit that writes a latent image on the electrophotographic photoreceptor. A one-component developing unit renders the latent image visible by developing thereof. A transfer device transfers the toner image from the electrophotographic photoreceptor onto a transfer medium. The inequality C×V<Q≦1.5×C×V is satisfied where C is an electrostatic capacitance of the electrophotographic photoreceptor, V is an absolute value of a surface potential of the electrophotographic photoreceptor after it is electrically charged by the electrostatic charging unit in an electrostatic charging process, and Q is an absolute value of an electrical charge calculated based on an amount of electrical current sent to the electrophotographic photoreceptor in the electrostatic charging process.