Invention Grant
- Patent Title: Image forming apparatus, method of determining deterioration degree of development agent, and program of determining deterioration degree of development agent
- Patent Title (中): 图像形成装置，显影剂的劣化程度的判定方法以及显影剂的劣化程度的判定程序
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Application No.: US12404503Application Date: 2009-03-16
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Publication No.: US08213812B2Publication Date: 2012-07-03
- Inventor: Takao Izumi , Minoru Yoshida , Hiroshi Murata , Takeshi Hatakeyama
- Applicant: Takao Izumi , Minoru Yoshida , Hiroshi Murata , Takeshi Hatakeyama
- Applicant Address: JP Tokyo JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba,Toshiba Tec Kabushiki Kaisha
- Current Assignee: Kabushiki Kaisha Toshiba,Toshiba Tec Kabushiki Kaisha
- Current Assignee Address: JP Tokyo JP Tokyo
- Agency: Turocy & Watson, LLP
- Main IPC: G03G15/08
- IPC: G03G15/08
Abstract:
The present invention provides a technique to accurately grasp a deterioration state of a development agent in a development device, in a development system which supplies a new development agent consisting of a toner and a carrier and discharges an deteriorated development agent to maintain a performance of a development agent in a development device.An image forming apparatus according to the present invention includes a stirring information obtaining section configured to obtain information of a stirring time of the development agent in the development device, a supply information obtaining section configured to obtain information of an amount of the carrier supplied into the development device, and a deterioration degree determining section configured to determine a deterioration degree of the development agent in the development device on the basis of the information obtained by the stirring information obtaining section and the supply information obtaining section.
Public/Granted literature
Information query
