Liquid Tape Joining for Continuous Security Tape Supply
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Solution Overview
Problem
Existing methods for connecting tapes require stopping and restarting the processing process, introduce contaminants, and are not suitable for non-yarn thread or multifilament tapes, especially in continuous processing environments like security document production.
Innovation Solution
A method using a non-hardening liquid with specific properties to adhere the end section of a first tape to the start section of a second tape, allowing continuous supply without splicing or additional adhesive elements, facilitated by a tape connecting device with guiding, wetting, and joining mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional tape connecting methods are used, then tapes can be connected together, but the processing process must be stopped and restarted, reducing productivity
Solution Approach 1:
The liquid is applied to the tape surface before the actual connection process to prepare the surface for bonding, enabling continuous processing without stopping. This preliminary wetting action allows the tapes to be connected while maintaining continuous movement through the processing line.
Solution Approach 2:
A liquid intermediary substance is introduced between the two tapes to facilitate connection. This liquid acts as a mediator that enables bonding without requiring the tapes to be stopped, allowing continuous processing while achieving reliable connection.
2Reliability
If traditional connecting methods are used, then tapes can be joined, but contaminants are introduced into the processing process
Solution Approach 1:
The liquid used for connection has specific parameters controlled - it is non-hardening and has controlled volatility. These parameter changes ensure the liquid provides sufficient connection strength while evaporating without leaving harmful residues, thus achieving reliable connection without contamination.
Solution Approach 2:
The liquid intermediary is designed to be temporary - it performs its function during connection and then evaporates completely without leaving residues. This disposable approach to the connecting medium ensures strong connection during the process but no contamination afterward.
3Adaptability or versatility
If conventional splicing or adhesive methods are used, then tapes can be connected, but the method is not suitable for non-yarn thread or multifilament tapes
Solution Approach 1:
The liquid connection method is designed to be universal and work with various tape types including non-yarn thread tapes and multifilament tapes. The liquid adapts to different tape surfaces and materials, providing a single versatile connection method that does not require complex adjustments for different tape types.
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
Enables continuous tape supply without process interruption, reduces contamination, and expands applicability to non-yarn thread tapes, enhancing process security and efficiency.
Implementation Method 1
A connection of the end section of the first tape to the start section of the second tape is provided by a liquid arranged between the same. In the connecting section the liquid connects the end section of the first tape and the start section of the second tape by an adhesion
Data Source
AI summary
A tape connecting device (1) and a method for connecting a first tape to a second tape for providing a tape string. In the tape connecting device (1) when continuously conveying the first tape an end section of the first tape is connected to a start section of the second tape by an adhesive connection by a liquid (in particular water) arranged in a connecting section. Furthermore, the invention relates to a method for connecting two tapes, a processing system and a use of a method. The inventive tape connecting device (1) and the method can in particular be used for a continuous provision of a security tape for a security document as a banknote.