Image Forming Toner Supply With Multi-Path Emptiness Detection
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Solution Overview
Problem
Existing image forming apparatuses face challenges in accurately sensing toner emptiness across different components, leading to potential failures in toner supply and reduced productivity.
Innovation Solution
The apparatus incorporates a control portion that utilizes multiple toner emptiness sensing paths with distinct conditions for the developing device, toner supplying device, and container, ensuring comprehensive toner level monitoring and switching to alternative supplies when emptiness is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single emptiness sensing path is used, then the device complexity is reduced, but the reliability of toner emptiness detection deteriorates
Solution Approach 1:
The patent divides the toner emptiness detection system into multiple independent sensing paths (container-level, supplying device-level, and developing device-level sensors). Each sensing path operates independently and monitors a specific aspect of toner availability. This segmentation allows the system to achieve higher reliability through redundancy while maintaining manageable complexity by organizing sensors into modular, functionally distinct units.
Solution Approach 2:
Different sensing paths employ different sensing conditions and thresholds appropriate to their specific locations and functions. The container sensor uses conditions optimized for detecting toner levels in the storage container, while the supplying device and developing device sensors use conditions tailored to their respective positions in the toner delivery chain. This local optimization ensures each sensor operates effectively for its specific purpose.
2Measurement precision
If multiple emptiness sensing paths with different conditions are used, then the measurement precision of toner emptiness is improved, but the device complexity increases
Solution Approach 1:
The control portion dynamically adjusts which sensing paths are active and which thresholds are applied based on the operational state of the toner supplying system. The system can selectively activate different sensing paths depending on whether the container, supplying device, or developing device is the focus of monitoring. This dynamic approach allows high measurement precision through multiple sensing conditions while reducing control complexity by activating only necessary sensors in given operational contexts.
Solution Approach 2:
The system implements feedback mechanisms where the control portion continuously monitors outputs from multiple sensing paths and adjusts toner supply operations accordingly. When one sensing path indicates emptiness, the system cross-references with other paths and feedback loops to confirm before triggering supply failures. This feedback approach enhances measurement precision through verification while managing control complexity through automated decision-making protocols.
Data Source
AI summary
An image forming apparatus includes a developing device, a container, a toner supplying device, and a control portion. The developing device supplies toner to an image carrying member. The container stores the toner supplied to the developing device. The toner supplying device transports the toner in the container to the developing device to supply the toner to it. The control portion senses toner emptiness in the container by using a plurality of emptiness sensing paths and uses different emptiness sensing conditions for the plurality of emptiness sensing paths.