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:
Aug. 21, 2007
Filed:
Sep. 26, 2005
Shinya Nakayama, Numazu, JP;
Satoshi Mochizuki, Numazu, JP;
Yasuaki Iwamoto, Numazu, JP;
Yasuo Asahina, Numazu, JP;
Kazuhiko Umemura, Shizuoka, JP;
Hideki Sugiura, Fuji, JP;
Hisashi Nakajima, Numazu, JP;
Tomoyuki Ichikawa, Numazu, JP;
Tomoko Utsumi, Numazu, JP;
Koichi Sakata, Numazu, JP;
Akihiro Kotsugai, Numazu, JP;
Osamu Uchinokura, Numazu, JP;
Masayuki Ishii, Numazu, JP;
Shinya Nakayama, Numazu, JP;
Satoshi Mochizuki, Numazu, JP;
Yasuaki Iwamoto, Numazu, JP;
Yasuo Asahina, Numazu, JP;
Kazuhiko Umemura, Shizuoka, JP;
Hideki Sugiura, Fuji, JP;
Hisashi Nakajima, Numazu, JP;
Tomoyuki Ichikawa, Numazu, JP;
Tomoko Utsumi, Numazu, JP;
Koichi Sakata, Numazu, JP;
Akihiro Kotsugai, Numazu, JP;
Osamu Uchinokura, Numazu, JP;
Masayuki Ishii, Numazu, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
The object of the present invention is to provide a developer having a sharp charge amount distribution and bringing out high-quality image without substantially smearing a charging unit, developing units, a photoconductor, and an intermediate transferring member by the developer, namely, a developer capable of providing an appropriate image density and exhibiting extremely little background smear even when used over a long period of time and repeatedly used for a number of sheets of paper as well as to provide an image forming apparatus for electrophotography using the developer.