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.:

US 8229309 B1

Expired

Date of Patent:

Jul. 24, 2012

Filed:

Sep. 16, 2009

Image forming device, computer readable medium and photoreceptor deterioration condition estimation method

Applicants:

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;

Inventors:

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;

Assignee:

Fuji Xerox Co., Ltd., Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

David Porta

Assistant Examiner:

Benjamin Schmitt

Int. Cl.

CPC ...

G03G 15/02 (2006.01);

U.S. Cl.

CPC ...

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.

Find Patent Forward Citations

Ono, Tomohiro. (2012). Image forming device, computer readable medium and photoreceptor deterioration condition estimation method (U.S. Patent No. 8229309). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8229309

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile