Image Forming Apparatus Controller Alternating Developing Agents
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Solution Overview
Problem
Infrequently used developing devices in image forming apparatuses wear out prematurely due to lack of use, leading to unnecessary replacement and waste, even when they retain a supply of developing agent, as all devices are driven regardless of need.
Innovation Solution
An image forming apparatus with a controller that selectively uses different developing agents to form images, including combining agents for infrequently used colors on a portion of pages if the print job exceeds a reference number of pages, and includes test pages to maintain agent flow and reduce wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all developing devices are driven to ensure adequate agent flow and prevent wear, then image quality is maintained, but components of infrequently used developing devices wear out prematurely
Solution Approach 1:
The system implements periodic action by alternating between different developing devices in cycles. When one developing device is used for a predetermined number of pages, the system switches to another developing device for subsequent pages, ensuring that each device receives periodic usage to maintain agent flow and prevent premature wear while still producing the required single color images.
2Duration of action of stationary object
If developing devices are used frequently to extend lifespan, then component wear is reduced, but developing agent is consumed faster
Solution Approach 1:
The system applies partial action by using each developing device for only a portion of the total printing workload rather than continuously. Each developing device operates for a predetermined number of pages and then is switched off, receiving periodic rather than continuous usage. This partial usage extends device lifespan while the system manages agent consumption across multiple devices.
3Loss of substance
If a single developing device is used for all pages, then agent consumption is optimized, but the device wears out due to continuous operation
Solution Approach 1:
The system segments the printing workload across multiple developing devices. Instead of one device handling all pages continuously, the total printing task is divided and distributed among several developing devices, with each device responsible for a predetermined number of pages. This segmentation reduces the continuous operation burden on each individual device, extending their operational lifespan.
Solution Approach 2:
The system implements periodic action by cycling through different developing devices in a predetermined sequence. Each device is activated for a specific number of pages and then switched to another device, creating a periodic usage pattern that prevents any single device from continuous operation and premature wear while maintaining overall printing efficiency.
Data Source
AI summary
An image forming apparatus and an image forming method therefor. The image forming apparatus includes: an image forming part, which forms printed and alternate printed images including different developing agents to a recording medium; and a controller which controls the image forming part to form a the printed and alternate printed images according to a comparison of number of pages of a print job and a reference number of pages, and a whether the images of the print job are of a single color.