Folded Web Material Stack With Reattachable End-Surface Connectors
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Solution Overview
Problem
Current dispensers for hygiene products, such as paper towels and napkins, face challenges with refill efficiency due to the need for strong web material in rolls and the inconvenience of handling and interconnecting stacked web material, leading to increased labor costs and limited design options.
Innovation Solution
A stack of Z-folded web material with connectors on the end surfaces that utilize surface adhesion for interconnection, allowing for easy attachment and detachment without mechanical or chemical alteration, enabling efficient handling and refilling of large dispensers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive tape or glue is applied to interconnect stacks of web material, then the connection strength is sufficient to pull the web of interconnected stacks, but the refill procedure becomes time-consuming and complex
Solution Approach 1:
The patent replaces mechanical adhesion systems (adhesive tape, glue) with a friction-based mechanical interlocking system. The T-shaped connectors engage with corresponding slots in adjacent stacks, creating a secure connection through geometric compatibility rather than chemical adhesion. This substitution eliminates the time-consuming application and drying processes associated with adhesives while maintaining sufficient connection strength for web dispensing operations.
Solution Approach 2:
The connector design enables self-aligning and self-securing during the refilling process. When stacks are placed adjacent to each other in the dispenser, the T-shaped connectors automatically engage with the slots through simple insertion, requiring no additional fastening steps. The friction fit and geometric interlocking provide self-servicing connection that secures the stacks together without requiring adhesive application or complex assembly procedures.
2Strength
If adhesive tape or glue is applied to interconnect stacks, then the connection is strong, but the device complexity and ease of operation are reduced
Solution Approach 1:
The patent replaces complex adhesive application systems with a simple geometric interlocking mechanism. The T-shaped connectors and slots provide a straightforward insert-and-lock system that is both strong and easy to operate. This mechanical design eliminates the need for adhesive dispensing equipment, surface preparation, and curing time, thereby improving ease of operation while maintaining connection strength through friction and geometric fit.
Solution Approach 2:
The connector design segments the refilling operation into simple, discrete steps: insert the stack with the T-connector into the slot, and the friction fit automatically secures the connection. This segmentation of the connection function into modular geometric elements makes the refilling process more intuitive and easier to perform compared to applying adhesive tape or glue, which require continuous manipulation and precision.
3Ease of operation
If conventional packages are designed for easy gripping, then the stack integrity is maintained during handling, but the packages are not suitable for large dispensers requiring multiple stack interconnection
Solution Approach 1:
The T-shaped connector design provides universal adaptability for interconnecting multiple stacks of various sizes. The same connector geometry can be used whether connecting two small stacks or multiple large stacks in a big dispenser. This universal design allows the same refilling procedure to be applied across different dispenser configurations, making the system adaptable to various capacities and formats while maintaining ease of handling through consistent connector dimensions that fit within standard package sizes.
Solution Approach 2:
The patent merges the handling features with the interconnection features in a unified connector design. The T-shaped connector is integrated into the stack package in such a way that it maintains the compact, grippable form factor of conventional packages while adding the capability for secure interconnection with adjacent stacks. This merging allows the package to serve dual purposes: easy manual handling during refilling and robust mechanical connection when multiple stacks are assembled in large dispensers.
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 solution enhances refill efficiency by allowing easy interconnection of stacked web material, reducing labor costs, and providing a flexible design for dispensers, while maintaining the integrity and usability of the web material.
Implementation Method 1
said first and second materials having such properties that, upon bringing said first and second smooth surfaces into contact with each other, the surfaces attach to each other by surface adhesion of the kind where the surfaces are repeatedly removable from and reattachable to each other while leaving the surfaces substantially unaltered
Data Source
AI summary
The present invention relates to a stack (1) of web material for hygiene products, for use in a dispenser, comprising at least one folded continuous web material (2, 3) and comprising a first connector (11a) and a second connector (11b), being adapted for interconnection of the first end surface (5) of the stack to a second end surface (6) of another, similar stack, and/or of the second and surface (6) of the stack to a first end surface (5) of another, similar stack. The first connector (11a) comprises a first generally smooth connection surface consisting of a first material, and the second connector (11b) comprises a second generally smooth connection surface consisting of a second material; said first and second materials having such properties that, upon bringing said first and second smooth surfaces into contact with each other, the surfaces attach to each other by surface adhesion of the kind where the surfaces are repeatedly removable from and reattachable to each other while leaving the surfaces substantially unaltered, whereby a connection between a first/second connector of the stack and a second/first connector of a similar stack having a connection strength in a plane including the connection surfaces sufficient to pull the web of the interconnected stacks is accomplished. Selected for publication: Fig.