Carrying Roller Speed Control for Metallic Foreign Matter
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Solution Overview
Problem
Existing image erasing apparatuses face issues when handling recording media bound with metallic foreign matter, such as staples, which can cause excessive load on carrying rollers, leading to potential damage and reduced efficiency.
Innovation Solution
The apparatus includes a detection unit to identify metallic foreign matter, a carrying control unit that decelerates the rotation speed of carrying rollers when such matter is detected, and a heating unit to erase images, thereby protecting the rollers and maintaining productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the carrying rollers rotate at normal speed to maintain productivity, then the processing efficiency is improved, but the rollers are damaged by the large load from metallic foreign matter
Solution Approach 1:
The detection unit identifies metallic foreign matter before the recording medium reaches the carrying rollers. The control unit receives this detection signal and preemptively adjusts the rotation speed of the carrying rollers to a lower speed, preventing the large load from damaging the rollers while maintaining normal processing speed for subsequent media
2Reliability
If the rotation speed of carrying rollers is reduced to protect the rollers, then the reliability is improved, but the productivity decreases
Solution Approach 1:
The control unit dynamically adjusts the rotation speed of the carrying rollers based on real-time detection signals. When metallic foreign matter is detected, the rotation speed is temporarily reduced to protect the rollers. When no foreign matter is detected, the rotation speed returns to normal, maintaining high productivity. This dynamic adjustment allows the system to adapt to varying conditions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively reduces the impact of metallic foreign matter on the rollers, ensuring successful image erasure and prolonged apparatus lifespan while maintaining productivity by adjusting the roller speed and protecting the heating and scanning components.
Implementation Method 1
a heating unit which is situated at a second position downstream in a carrying direction from the first position in the carrying path and heats the recording medium to a color erasing temperature of a developer or higher
Data Source
AI summary
An image erasing apparatus includes: a supply unit which supplies a recording medium; a collection unit which collects the recording medium supplied by the supply unit; plural carrying roller pairs which carry the recording medium supplied by the supply unit, toward the collection unit; a detection unit which acquires information about a metallic foreign matter adhering to the recording medium; a heating unit which heats the recording medium to a color erasing temperature of a developer or higher; and a carrying control unit which decelerates a rotation speed of the plural carrying roller pairs from a first speed to a second speed when the information about the metallic foreign matter is acquired by the detection unit.