Automatic Tab-and-Recess Coupling for Flexible Sheet Binding
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Solution Overview
Problem
Existing binding systems for sheets, particularly those involving tabs and recesses, are inefficient for flexible materials like textiles due to deformation under force and require manual coupling, which is time-consuming, especially with larger numbers of tabs.
Innovation Solution
The introduction of notch-equipped, arrow-shaped tabs with flexible wings and reinforced recesses, along with an automatic coupling device, allows for secure attachment of flexible materials and reduces coupling time by using a sprocket wheel mechanism or push pin system for precise alignment and attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If tabs with oblique edges are used for binding, then the binding system can accommodate varied sheet shapes, but flexible materials like textiles cannot be firmly coupled because tabs deform under force
Solution Approach 1:
The patent changes the geometric parameters of the tab edges from oblique to substantially parallel with the base sheet edge. This parameter change prevents tab deformation under force while maintaining compatibility with varied sheet shapes through the flexible positioning of the tab row along the edge.
Solution Approach 2:
The patent introduces notches at predetermined positions along the tab edges before coupling occurs. These pre-formed notches engage with corresponding protrusions on the base sheet, creating preliminary mechanical interlocking that prevents tab deformation and ensures firm coupling of flexible materials.
2Reliability
If a greater number of tabs are used on sheet edges, then the connection becomes more secure, but the manual coupling process becomes time consuming
Solution Approach 1:
The patent combines multiple coupling actions into a single automated operation. The coupling device simultaneously engages multiple tabs with their corresponding protrusions in one motion, merging what would otherwise be sequential manual operations into a single time-efficient step that maintains secure connection.
Solution Approach 2:
The patent replaces the manual mechanical coupling process with an automated coupling device that uses controlled mechanical motion. The device automatically positions and engages tabs with protrusions, eliminating the time-consuming manual alignment and attachment process while maintaining connection security.
3Strength
If tabs are made larger to improve connection strength, then more secure coupling is achieved, but insufficient space remains on sheet edges for proper tab positioning
Solution Approach 1:
The patent applies different geometric characteristics to different parts of the tab structure. The tab body maintains sufficient size for strength, while the edges are configured with substantially parallel orientation and notches that optimize space utilization. This local differentiation allows strong connection without excessive tab size.
Solution Approach 2:
The patent optimizes the geometric parameters of tabs and their spacing along the edge. By changing the edge orientation to substantially parallel and incorporating notches at specific intervals, the design achieves maximum connection strength within the available edge space, preventing both tab deformation and space insufficiency.
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 solution enables robust and efficient coupling of flexible materials like textiles and other materials, including thicker foils, by ensuring tabs are securely fixed in recesses, preventing unintentional detachment and significantly reducing the time required for the binding process.
Implementation Method 1
The coupling device comprises a holder with a coupling gear which can be rotated in the holder, wherein each tooth of the coupling gear comprises two projections at its end, the function of which is to push both wings of a tab through the corresponding recess
Implementation Method 2
Each tab includes a flexible wing on both lateral sides, which may be hingedly attached to the middle portion of the tab. Each tab may include a crease at its attachment to the base sheet such that the tabs may bend around this fold line.
Data Source
AI summary
The present invention relates to a binding system which is especially suitable for firmly joining flexible thin sheets of material together by clamping tabs in recesses. The tabs and recesses can be reinforced on their edges with a plastic strip and are therefore less deformable, so that this system can also be used for joining textiles. The tabs may include a protrusion for better coupling of the sheets. The sheets may include push pads and wedges for use as a hook and loop fastener, a zipper or as a resealable package. Another embodiment concerns a press stud system with two types of metal or plastic press studs, which include either a tab or a recess in the center. The present invention also includes an automatic coupling device. This saves a lot of time in the binding process with larger numbers of tabs to be linked.