Erasing Apparatus Jam Control via Reverse Conveyance
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Solution Overview
Problem
Existing erasing apparatuses face issues with sheet jams, where the sheet remains in a hot erasing section, leading to potential burning due to high-temperature heat sources, and there is a need for effective conveyance control to safely manage such jams.
Innovation Solution
The erasing apparatus incorporates sensors and a control system to detect sheet jams and reverse conveyance, moving the sheet out of the erasing section and stopping the heat sources to prevent damage, while also allowing for continued operation of non-jammed sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the erasing apparatus is stopped in a state in which the sheet remains in the erasing section due to sheet jam, then the erasing processing can be halted, but the sheet is burned because the erasing section is hot
Solution Approach 1:
The control unit performs preliminary actions by detecting the sheet jam condition and automatically executing conveyance control to move the sheet out of the erasing section before burning can occur. The system proactively responds to the jam condition by reversing the conveying direction and transporting the sheet to a safe location, preventing the harmful effect rather than reacting after damage occurs.
Solution Approach 2:
The control unit acts as an intermediary between the sheet jam condition and the potential burning outcome. It detects the jam through sensors, processes the information, and executes conveyance control to relocate the sheet. This intermediary control mechanism coordinates the interaction between the jammed sheet, the hot erasing section, and the conveying system to prevent direct contact between the sheet and excessive heat.
2Reliability
If the conveying direction is reversed to move the sheet out of the erasing section, then the sheet can be removed safely, but the conveying section must handle bidirectional movement
Solution Approach 1:
The conveying section is designed with dynamic capabilities to change its operating direction based on the situation. The conveying unit can switch between normal forward conveyance and reverse conveyance modes, allowing the system to adapt its behavior to different operational states. This dynamic adjustment enables safe sheet removal during jams while maintaining normal operation during regular processing.
Solution Approach 2:
The control unit employs feedback mechanisms by monitoring sheet position and jam conditions through sensors. Based on this feedback information, the system automatically adjusts the conveying direction and speed. The feedback loop detects when a sheet is jammed, determines the appropriate reverse conveyance action, and executes the sheet removal operation, creating a closed-loop control system that handles complexity automatically.
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 enables safe and efficient handling of sheet jams by preventing burning and allowing uninterrupted operation of the apparatus, improving user safety and operational efficiency.
Implementation Method 1
a heating unit configured to heat the recording medium in the erasing section
Implementation Method 2
a sensor configured to detect the recording medium conveyed through the erasing section by the conveying section
Data Source
AI summary
According to one embodiment, a erasing apparatus includes: a paper feeding section configured to feed a recording medium on which a erasable image is recorded to a conveying path; a conveying section configured to convey the recording medium along the conveying path; a erasing section configured to erase a color of the image on the recording medium; a sensor configured to detect the recording medium conveyed through the erasing section by the conveying section; and a control section configured to perform, if the sensor detects occurrence of a jam of the recording medium, control to convey the recording medium present in the conveying path.