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:
Jan. 04, 2011
Filed:
Feb. 04, 2009
Shuuichi Nakagawa, Suita, JP;
Ryuji Inoue, Itami, JP;
Shin Murayama, Sanda, JP;
Kazushige Ohnishi, Hitachi, JP;
Shintaro Yamada, Ikeda, JP;
Shuuichi Nakagawa, Suita, JP;
Ryuji Inoue, Itami, JP;
Shin Murayama, Sanda, JP;
Kazushige Ohnishi, Hitachi, JP;
Shintaro Yamada, Ikeda, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A developing device that can reliably supply toner from a toner supply roller to a developing roller and that does not generate scraping irregularities in the toner thin layer on the developing roller, and a process cartridge and an image forming apparatus having the same. The developing device has: a toner supply chamber; a developing roller provided in the toner supply chamber; a toner supply roller provided in the toner supply chamber for supplying toner to the developing roller; and a layer regulation member for forming the toner on the developing roller into a thin layer, and develops electrostatic latent images on an image carrier by applying bias voltage to the developing roller. An intermediate contact member is interposed between the developing roller and the toner supply roller. The intermediate contact member is a sheet member fixed at one end, and the free end of the sheet member is interposed between the developing roller and the toner supply roller, with the free end side protruding therebetween.