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:
Jul. 24, 2012
Filed:
Sep. 16, 2009
Tomohiro Ono, Kanagawa, JP;
Shinya Makiura, Kanagawa, JP;
Tomokazu Kurita, Niigata, JP;
Hiroki Ando, Kanagawa, JP;
Toshie Nakamoto, Kanagawa, JP;
Hideki Moriya, Kanagawa, JP;
Masao Ohmori, Kanagawa, JP;
Tomohiro Ono, Kanagawa, JP;
Shinya Makiura, Kanagawa, JP;
Tomokazu Kurita, Niigata, JP;
Hiroki Ando, Kanagawa, JP;
Toshie Nakamoto, Kanagawa, JP;
Hideki Moriya, Kanagawa, JP;
Masao Ohmori, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An image forming device includes an image holding member and a charging unit. In a case in which an AC current, while being increased, is supplied to the charging unit in a state in which a DC voltage value and an AC voltage value applied to the charging unit are maintained, or a case in which a DC voltage, while being increased, is supplied to the charging unit in a state in which the AC voltage value applied to the charging unit is maintained, a current detection unit detects DC current values. An inflection point derivation unit derives an inflection point of a correlation line representing an correlation between the detected DC current values and the supply amounts. An execution unit executes pre-specified processing when a characteristic value of the derived inflection point reaches a pre-specified value.