Development Agent Deterioration Monitoring in Image Forming Apparatus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional development systems fail to adequately replace the carrier in development devices, leading to deteriorated development agents and poor image quality due to insufficient carrier supply, especially when the print ratio is low.
Innovation Solution
An image forming apparatus that includes a stirring information obtaining section, a supply information obtaining section, and a deterioration degree determining section to accurately assess the deterioration of the development agent by monitoring stirring time and carrier supply, ensuring timely replacement of the carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the carrier is supplied to the development device together with the toner, then the carrier is gradually replaced, but the carrier is not sufficiently replaced when the print ratio is low
Solution Approach 1:
The system calculates a replacement degree based on the relationship between the amount of carrier supplied and the stirring time, then compares this against a predetermined threshold to determine when carrier replacement is insufficient. This feedback mechanism allows the system to adapt carrier replacement timing to actual usage conditions, ensuring adequate replacement regardless of print ratio variations.
Solution Approach 2:
The invention introduces new parameters (stirring time, replacement degree calculation) to monitor and control the carrier replacement process. By changing from a simple supply-based approach to a composite metric considering both supply amount and mixing duration, the system can accurately assess replacement sufficiency and trigger appropriate actions.
2Duration of action of stationary object
If the carrier in the development device is not sufficiently replaced, then the system operates continuously, but the development agent deteriorates and generates poor image quality
Solution Approach 1:
The system performs preliminary assessment of carrier replacement sufficiency by calculating the replacement degree before image quality deterioration occurs. By monitoring the relationship between carrier supply amount and stirring time, the system can predict when replacement is insufficient and take preventive action, avoiding the development agent deterioration that leads to poor image quality.
Solution Approach 2:
The calculation and comparison of replacement degree against threshold values provides continuous feedback on development agent health. This feedback loop enables the system to maintain reliable operation by ensuring adequate carrier replacement before deterioration affects image quality, even during extended continuous operation periods.
Data Source
AI summary
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.