Paper Drinking Straw End Closure Using Exterior Tongue-Fold Bonding
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Solution Overview
Problem
The process of closing the end of a paper-based drinking straw to create a 'sensory straw' is complex and time-consuming due to the need for precise positioning of adhesive inside the hollow body, making it costly and inefficient compared to plastic straws.
Innovation Solution
A method involving cutting a tongue-shaped portion at the end of the straw, folding it over the opening, and bonding it to the exterior side, allowing for adhesive application outside the tube, which simplifies the process and creates two lateral openings for liquid intake, optionally with additional holes for a more pleasant drinking experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is applied inside the hollow body of the drinking straw to close the opening, then the closure is reliable, but the process becomes complex and time-consuming
Solution Approach 1:
Instead of applying adhesive inside the hollow body of the straw as in conventional methods, the invention inverts the approach by applying adhesive on the exterior surface of the straw wall. The tongue-shaped portion is then folded over and bonded to this exterior adhesive layer, eliminating the need for precise internal adhesive positioning while maintaining reliable closure.
Solution Approach 2:
The invention extracts the adhesive application step from the interior of the hollow body and relocates it to the exterior surface of the straw wall. This separation removes the complexity of precise internal positioning while preserving the bonding function, thereby improving production efficiency without sacrificing closure reliability.
2Manufacturing precision
If adhesive is precisely positioned inside the hollow body, then bonding accuracy is achieved, but the process becomes cost-intensive
Solution Approach 1:
The invention inverts the adhesive application location from the interior to the exterior of the straw wall. This eliminates the need for complex precision positioning equipment and techniques required for internal adhesive application, thereby reducing manufacturing costs while maintaining bonding accuracy through the exterior application method.
Solution Approach 2:
The exterior surface of the straw wall serves as the adhesive application surface, utilizing the existing external geometry of the straw rather than requiring internal positioning mechanisms. This self-service approach simplifies the manufacturing process and reduces costs by eliminating complex positioning systems.
3Adaptability or versatility
If the end area is cut and folded to create lateral openings, then the sensory straw function is achieved, but the structural complexity increases
Solution Approach 1:
The end area of the straw is segmented by cutting to create a tongue-shaped portion that can be folded back. This segmentation allows the creation of lateral openings that enable the sensory straw function, where liquid flows through multiple small holes rather than a single opening, enhancing the drinking experience while using a simple folded structure.
Solution Approach 2:
The tongue-shaped portion is folded back along the longitudinal axis of the straw, utilizing the third dimension to create lateral openings from what would otherwise be a simple end closure. This dimensional transformation achieves the sensory function without requiring complex multi-component structures.
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 method simplifies and cost-reduces the closure process of paper-based drinking straws, enabling efficient production of 'sensory straws' by eliminating the need for precise adhesive insertion and allowing for adjustable opening sizes, while ensuring reliable bonding and a pleasant drinking sensation.
Implementation Method 1
bonding the tongue-shaped portion to the exterior side of the wall of the drinking straw
Data Source
AI summary
The invention relates to a method for closing the ends of a drinking straw (1) on the basis of paper, comprising the following steps: providing a tubular drinking straw (1) on the basis of paper; cutting to size an end region of the drinking straw (1) so that a tongue-shaped portion (4) is formed; reversing the tongue-shaped portion (4) over the opening (3a) of the drinking straw (1) so that two lateral openings (10) are formed; adhesively bonding the tongue-shaped portion (4) with the outer side of the wall (2) of the drinking straw (1).