Sealed Package Stiffener Folding for Mechanical Stability
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Solution Overview
Problem
Existing sealed packages for cigarettes with rigid stiffeners face challenges in maintaining mechanical stability during the folding and heat-sealing process, leading to complex and unreliable interlocking mechanisms, which complicates the extraction and re-closing of cigarettes.
Innovation Solution
A sealed package design featuring a 'U'-shaped stiffener with fin-shaped central and lateral heat seals, and triangular end tabs, stabilized by a pressure pad to maintain the folded configuration without glue, simplifying the packaging process and improving mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a mechanical interlocking mechanism is implemented to stabilize the stiffener, then the stability of the stiffener is improved, but the device complexity increases and reliability decreases due to complex folding operations
Solution Approach 1:
The invention extracts the complex mechanical interlocking mechanism (central stabilizing tab folded 180° over lateral tabs with slot insertion) and replaces it with a simpler configuration where the central stabilizing tab is folded 90° against the lateral walls without requiring insertion into slots. This removes the complex interlocking requirement while maintaining stabilization function.
Solution Approach 2:
Instead of folding the central stabilizing tab 180° over the lateral tabs to create an interlocking mechanism, the invention inverts the approach by folding it 90° to lie flat against the lateral walls. This reversal simplifies the folding operation from a complex two-stage interlocking process to a single-stage flat positioning operation.
2Stability of the object's composition
If a complex interlocking mechanism is used to stabilize the stiffener, then the stability is improved, but the ease of manufacture deteriorates due to difficult implementation in packing machines
Solution Approach 1:
The invention performs the stabilization action preliminarily by having the central stabilizing tab lie flat against the lateral walls from the outset, rather than requiring complex interlocking operations during the packing process. The tab is positioned in its final stable configuration as part of the basic folding operation, eliminating the need for subsequent interlocking steps in the packing machine.
Solution Approach 2:
The stiffener structure serves itself by using the central stabilizing tab to automatically stabilize against the lateral walls through a simple 90° fold, without requiring complex mechanical interlocking systems or additional stabilization components. The structure achieves its own stabilization through the inherent geometry and folding of its elements.
3Ease of operation
If stabilizing tabs are folded onto the bottom wall to increase stability, then the handling of cigarettes is improved, but the device complexity increases due to multiple folding operations
Solution Approach 1:
The invention uses partial action by folding the central stabilizing tab 90° to lie against the lateral walls, which is sufficient to provide the needed stability and improve cigarette handling. This partial folding (90°) is less complex than the excessive action of folding it 180° over the lateral tabs, achieving the necessary stabilization without the full complexity of the interlocking mechanism.
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 provides a stable and easy-to-produce sealed package that maintains shape integrity and simplifies the handling of cigarettes during packaging, ensuring reliable folding and heat-sealing without the need for adhesives, thus enhancing the packaging efficiency and maintaining the quality of the cigarettes.
Implementation Method 1
a sealed inner package, which is formed by folding and heat-sealing a sheet of waterproof packing material
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
Sealed package (3) having: a group (4) of articles; an extraction opening (5); a reclosable adhesive panel (6) superimposed on the extraction opening (5) and glued to the sealed package (3) about the extraction opening (5) itself by¬ re-stick adhesive; and a stiffener (12), which is inserted inside the sealed package (3) contacting the group (4) of articles, and has: a front wall (13), two lateral walls (14), a bottom wall (15), two lateral stabilizing tabs (16) connected to the lateral walls (14), and a central stabilizing tab (17) connected to the bottom wall (15); the lateral stabilizing tabs (16) are folded onto the outer surface of the bottom wall (15) and the central stabilizing tab (17) is folded onto the outer surface of the bottom wall (15) and over the two previously folded lateral stabilizing tabs (16).