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:
Feb. 14, 2012
Filed:
Nov. 16, 2009
Kensuke Fujihara, Osaka, JP;
Tamotsu Shimizu, Osaka, JP;
Ryota Maeda, Osaka, JP;
Kouji Fujii, Osaka, JP;
Tomoyuki Kikuta, Osaka, JP;
Kensuke Fujihara, Osaka, JP;
Tamotsu Shimizu, Osaka, JP;
Ryota Maeda, Osaka, JP;
Kouji Fujii, Osaka, JP;
Tomoyuki Kikuta, Osaka, JP;
Kyocera Mita Corporation, Osaka, JP;
Abstract
An image forming apparatus includes: a photoconductive drum; a developing roller carrying toner; a DC voltage application portion outputting a DC voltage to be applied to the developing roller, and receiving a feedback voltage; an AC voltage application portion applying an AC voltage to be applied to the developing roller; a detection portion detecting occurrence of electric discharge; a first resistor portion generating a feedback voltage that is fed to the DC voltage application portion; a second resistor portion connected between the DC voltage application portion and the AC voltage application portion, and having a switching portion with which conducting on and off are switchable; and a control portion controlling the switching portion, at the time of printing, to bring the second resistor portion into a conducting state and, at the time of electric discharge detection, to bring the second resistor portion into a non-conducting state.