Helicoidal Dragging Belt for Compact Paper Transport
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Solution Overview
Problem
Traditional paper dragging belts in paper converting plants are bulky, require large guide systems, and can cause paper ply rupture due to tension, leading to inefficiencies and increased risk of material loss.
Innovation Solution
A paper dragging belt with a helicoidal through cut and circular cross section, allowing for secure engagement of paper edges without additional cost, reducing the risk of rupture and minimizing the overall dimensions of the dragging system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional flat dragging belts with rectangular cross section are used, then the belts can support and guide paper plies along the path, but the guide system requires relatively large dimensions and the belts are bulky
Solution Approach 1:
The patent applies spheroidality by changing the belt cross-section from rectangular to circular. This curvature allows the belt to flex more easily around pulleys and reduces the overall volume of the belt while maintaining its ability to support and guide paper plies along the required path, thereby reducing guide system dimensions
2Force
If high tension is applied to traditional belts to drive paper plies, then the driving force is sufficient, but the paper plies can easily tear in the vicinity of their part inserted in the longitudinal cut of the belts or escape from the belts themselves
Solution Approach 1:
The patent changes the geometric parameters of the belt, specifically the cross-sectional shape from rectangular to circular, and introduces a helicoidal through-cut instead of a straight longitudinal cut. This parameter change allows the belt to distribute tension more evenly and provides a more secure engagement mechanism for the paper ply, reducing the risk of tearing or escaping while maintaining sufficient driving force
3Reliability
If pulleys with width matching the belt are used to ensure correct support, then the belts are properly supported, but the guide system requires relatively large dimensions
Solution Approach 1:
The circular cross-section of the belt allows for more compact pulley designs compared to rectangular belts. The curved surface of the circular belt distributes contact pressure more effectively around the pulley, maintaining reliable support while enabling smaller pulley diameters and thus reducing the overall area occupied by the guide system
Data Source
AI summary
Dragging element for dragging web materials comprising at least a portion with at least one through cut (2) apt to engage a part (40) of a web material (4) intended to be moved in a direction imposed by the same dragging element that follows a predetermined operating path, said at least one cut (2) is helicoidal.