Sheet Alignment Device with Vibration and Air Cushioning
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Solution Overview
Problem
Existing substrate handling systems face challenges in aligning and loosening partial stacks of sheets, particularly when individual sheets block each other due to different topographies caused by printing fluid or materials like toner or powder, leading to dog ears and uneven stacks.
Innovation Solution
A substrate handling system with an alignment device featuring four stops, including two side stops and one back stop, equipped with blowing devices and vibration mechanisms, which uses air cushions and oscillating movements to align and separate sheets, ensuring precise positioning and handling of sheets within the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional stopping methods are used to align sheets, then alignment can be achieved, but sheets block each other due to different topographies caused by printing fluid or materials
Solution Approach 1:
The alignment device employs vibration mechanisms that generate oscillating movements to separate and align sheets. The vibration causes sheets to move independently, preventing blocking while achieving precise alignment through controlled oscillatory motion.
Solution Approach 2:
The system uses blowing devices with air nozzles to apply pneumatic force to the sheets. Air streams are directed at specific locations to separate sheets, prevent blocking, and assist in alignment without mechanical contact that would cause dog ears or topography differences.
2Productivity
If sheets are handled in stacks with different topographies, then processing can continue, but dog ears and uneven stacks occur
Solution Approach 1:
Vibration mechanisms are applied to the stack to level and uniformize the topography. The oscillating motion prevents sheets from being compressed into uneven stacks and eliminates dog ears, ensuring uniform stack appearance while maintaining processing continuity.
Solution Approach 2:
Air streams from blowing devices are used to separate and redistribute sheets within the stack, eliminating topography differences and preventing dog ears. The pneumatic action ensures uniform stacking while allowing continuous processing without interruption.
3Adaptability or versatility
If format changes are made frequently, then adaptability to different substrate sizes is improved, but processing interruptions occur
Solution Approach 1:
The alignment device features adjustable stops and vibration mechanisms that can be dynamically reconfigured for different formats. The system adapts to various substrate sizes through movable components that can be quickly adjusted, allowing format changes without processing interruptions.
Solution Approach 2:
The system changes operational parameters such as stop positions, vibration frequencies, and air stream directions to accommodate different formats. By adjusting these parameters rather than requiring physical reconfiguration, the system maintains continuous processing while adapting to different substrate sizes.
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 system enables reliable and efficient processing of sheet stacks by eliminating topography differences, allowing for quick format changes and adaptable handling of diverse substrate sizes, ensuring uninterrupted processing and minimizing manual intervention.
Implementation Method 1
at least one blowing device with at least one air-ejecting nozzle is assigned to at least one stop
Implementation Method 2
at least one drive that generates a vibration or oscillating movement is assigned to at least one stop
Data Source
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AI summary
The invention relates to a substrate handling system comprising a sheet processing machine (01) and at least one aligning device (31). The at least one aligning device (31) comprises at least four stops (32; 33; 34), wherein at least one stop (32) is designed as a front stop (32), at least one stop (34) is designed as a rear stop (34), and at least two stops (33) are designed as respective lateral stops (33). The at least two lateral stops (33) are arranged opposite each other, and the at least one front stop (32) and the at least one rear stop (34) are arranged opposite each other. The aligning device (31) has at least one support element (41), and at least one respective support element (41) is arranged on the at least two lateral stops (33) and the at least one rear stop (34). The invention additionally relates to another substrate handling system and to a method for aligning and/or loosening at least one sub-stack of sheets in a substrate handling system with a sheet processing machine (01).