Print Exit Auxiliary Device for Paper Jam Prevention
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Solution Overview
Problem
The low rotational speed of eject rollers in printing apparatuses leads to paper sheets being outputted slowly, causing them to jam due to increased resistance from previously outputted sheets, resulting in paper jams as the contact area and resistance grow with each outputted sheet.
Innovation Solution
An auxiliary device with a first and second position state is integrated at the print exit, featuring an output auxiliary member that pushes printed materials away from the exit, utilizing elastic deformation or magnetic forces to enhance output speed and prevent jams by maintaining a distance between sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the eject roller rotational speed is increased to improve paper output speed, then productivity increases, but the risk of paper jams increases due to reduced contact time and potential misalignment
Solution Approach 1:
A sensor is introduced as an intermediary device to detect the position and state of paper sheets during ejection. The sensor provides real-time feedback to the control unit, which then adjusts the eject roller rotational speed dynamically. This intermediary detection system enables the system to maintain high productivity while preventing paper jams by making real-time adjustments based on actual paper ejection conditions.
2Productivity
If multiple paper sheets are outputted continuously to increase productivity, then the number of sheets processed increases, but the contact area between sheets increases leading to larger resistance and paper jams
Solution Approach 1:
The eject roller operates with periodic variations in rotational speed rather than continuous constant speed. The control unit adjusts the rotational speed in a periodic manner based on sensor feedback, creating intervals of higher and lower speed that prevent continuous contact between paper sheets. This periodic action reduces cumulative resistance while maintaining overall productivity.
Solution Approach 2:
The rotational speed parameter of the eject roller is dynamically changed based on the number of sheets being processed and the detected resistance. The control unit modifies the speed parameter in real-time to optimize the balance between productivity and resistance management, preventing paper jams while maintaining high throughput.
3Reliability
If the eject roller rotational speed is kept low to maintain stable paper output, then paper jams are reduced, but the output speed and productivity decrease
Solution Approach 1:
The eject roller rotational speed is made dynamic rather than static. The control unit continuously adjusts the speed based on real-time sensor feedback about paper position and ejection conditions. This dynamic control allows the system to operate at higher speeds when conditions are favorable while maintaining stability when needed, thus improving overall productivity while preserving reliable paper output.
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
The auxiliary device effectively increases the output speed of printed materials and prevents paper jams by ensuring a consistent distance between sheets, thereby reducing resistance and contact area, ensuring smooth and efficient printing.
Implementation Method 1
utilizing elastic deformation or magnetic forces to enhance output speed and prevent jams by maintaining a distance between sheets
Implementation Method 2
utilizing elastic deformation or magnetic forces to enhance output speed and prevent jams by maintaining a distance between sheets
Data Source
AI summary
An auxiliary device and a printing apparatus are provided. The printing apparatus includes a print output device, including a print exit. The printing apparatus also includes an auxiliary device disposed at the print exit of the print output device and having a first position state and a second position state. During a transition of the auxiliary device between the first position state and the second position state, the auxiliary device pushes print outputted from the print exit to move in a direction away from the print exit.