Erasing Apparatus Speed Control for Residual Image Prevention
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Solution Overview
Problem
In decoloring apparatuses, residual images can occur due to insufficient temperature in the decoloring section, especially when starting a decoloring job from a low temperature state, such as after a jam is released, leading to uncertainty for users about the process initiation.
Innovation Solution
The apparatus controls the transportation speed of the sheet to a low speed for a predetermined period after job start, allowing the decoloring section to reach the decoloring temperature gradually, thereby preventing residual images and ensuring the sheet is supplied to the decoloring section immediately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the decoloring section is heated to decoloring temperature before starting the process, then residual images are prevented, but the user does not know whether the process has started due to delayed sheet feeding
Solution Approach 1:
The decoloring section is preheated to the decoloring temperature before the decoloring process begins. This preliminary heating action ensures that when the sheet is fed, the decoloring section is already at the required temperature, preventing residual images while maintaining immediate process responsiveness.
2Productivity
If the decoloring section temperature is insufficient when starting from a stopped state, then the process can start immediately, but residual images occur due to inadequate heating
Solution Approach 1:
The transportation speed is dynamically adjusted based on the decoloring section temperature. When the temperature is insufficient, the speed is reduced to allow gradual heating. When the temperature reaches the decoloring temperature, the speed increases to normal operation, optimizing both heating efficiency and productivity.
Solution Approach 2:
The transportation speed parameter is changed according to temperature conditions. The controller reduces the transportation speed when the decoloring section temperature is below the decoloring temperature, and restores it to normal speed when the temperature requirement is met, adapting the process parameters to thermal conditions.
3Reliability
If the transportation speed is reduced to allow gradual heating, then residual images are prevented, but the processing time increases
Solution Approach 1:
The transportation speed operates in periodic phases: initially reduced to allow gradual heating of the decoloring section, then transitions to normal speed once the decoloring temperature is reached. This periodic speed adjustment ensures complete heating while minimizing the overall time loss.
Solution Approach 2:
The transportation speed is partially reduced (not completely stopped) during the heating phase, allowing the decoloring section to gradually reach the required temperature while still maintaining some level of productivity. This partial reduction balances heating requirements with time efficiency.
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 approach prevents residual images by maintaining a low transportation and decoloring speed until the decoloring section reaches the required temperature, ensuring efficient decoloring without user uncertainty about the process initiation.
Implementation Method 1
an erasing section for erasing an image formed on a sheet by heating the sheet which is transported through the erasing section
Data Source
AI summary
An erasing apparatus according to an embodiment includes an erasing section configured to erase an image formed on a sheet by heating the sheet that is transported through the erasing section, the erasing section including a heating roller, a press roller in contact with the heating roller. A motor rotates the heating and press rollers. A transportation section transports the sheet. The erasing apparatus further includes a controller that controls the erasing section and the transportation section so that a transportation speed of the sheet transported through the erasing section is a first transportation speed lower than a normal speed if a predetermined period of time from a start of a job has not elapsed.