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. 18, 2009
Filed:
Oct. 25, 2005
Satoru Miyamoto, Kanagawa, JP;
Makoto Yasuda, Kanagawa, JP;
Satoru Miyamoto, Kanagawa, JP;
Makoto Yasuda, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
In a developing device of the present invention, the ratio of the volume of a two-ingredient type developer to the capacity of a space storing the developer is selected to range from 40% to 75%. A carrier, forming part of the developer, is made up of a core and a resinous coating layer formed on the core. The resinous coating layer contains conductive particles each having a tin dioxide layer formed on a core and an indium oxide layer formed on the tin dioxide layer and containing tin dioxide. The conductive particles are provided with an oil absorbing amount ranging from 10 ml/100 g to 300 ml/100 g.