Cigarette Pack With Preformed Opening and Reclosable Closure Flap
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Solution Overview
Problem
Existing cigarette packs face challenges in the design and functionality of their opening aids, particularly in creating a dispensing opening that is not compromised by the removal of an opening tab, and in ensuring precise positioning and integration of closure flaps during the manufacturing process.
Innovation Solution
The cigarette pack design incorporates a prefabricated dispensing opening in the film block, covered by a closure flap, with adhesive edges, and utilizes a closure flap integrated into a multi-layer film structure, where the opening flap is formed during production by precise cutting or punching, and monitored by optoelectronic sensors for correct positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a closure tab is removed from the film to create a dispensing opening, then access to the pack contents is enabled, but the structural integrity and sealing of the pack is compromised
Solution Approach 1:
The film structure is segmented into multiple layers with distinct functions: an outer closure flap layer that maintains sealing integrity and an inner opening layer that creates the dispensing opening. This segmentation allows the opening function to be isolated from the sealing function, preventing compromise of pack integrity while enabling access.
Solution Approach 2:
The dispensing opening is pre-formed in the inner film layer during the blank production stage, before the closure flap is applied. This preliminary action ensures the opening structure is ready in advance, allowing the closure flap to be subsequently positioned and sealed without compromising the pre-established opening pathway.
2Reliability
If a closure flap is applied to cover the dispensing opening, then pack integrity is maintained, but positioning precision and alignment during manufacturing becomes challenging
Solution Approach 1:
A positioning aid structure acts as an intermediary element between the closure flap and the film blank. This mediator provides reference features that guide the closure flap into correct alignment during application, ensuring precise positioning without requiring complex manufacturing controls.
Solution Approach 2:
Optoelectronic sensors detect positioning and alignment of the closure flap by monitoring optical contrast and color differences between the closure flap, positioning aids, and surrounding film. This optical detection method enables precise measurement and control of closure flap placement during automated manufacturing.
3Adaptability or versatility
If the opening aid is integrated into a multi-layer film structure, then functionality is enhanced, but the manufacturing process complexity increases
Solution Approach 1:
The closure flap and opening aid structures are merged into a single integrated multi-layer film blank. By combining these functional elements into one pre-formed unit, the system reduces the number of separate components and assembly steps required, thereby simplifying the overall manufacturing process despite the enhanced functionality.
Solution Approach 2:
The multi-layer film structure serves multiple functions simultaneously: the outer layer provides closure and sealing, the inner layer creates the dispensing opening, and integrated positioning aids guide assembly. This multi-functionality is achieved within a single film blank, eliminating the need for separate components and reducing manufacturing complexity.
4Productivity
If automated production with optoelectronic sensors is implemented, then manufacturing efficiency is improved, but detection precision requirements and system complexity increase
Solution Approach 1:
The film structure incorporates distinct optical contrast features and color differences that are easily detectable by optoelectronic sensors. These optical characteristics enable the sensors to accurately identify the closure flap, positioning aids, and dispensing opening without requiring extremely high measurement precision, thus balancing automation efficiency with achievable detection accuracy.
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 approach ensures a reliable, automated, and efficient creation of the dispensing opening, maintaining pack integrity and facilitating easy access while ensuring precise alignment and functionality of the closure flap, enhancing the manufacturing process.
Implementation Method 1
Overlapping edges are bonded to an edge of the film surrounding the opening using permanent adhesive, preferably pressure-sensitive adhesives (PSA adhesives)
Implementation Method 2
monitored by optoelectronic sensors for correct positioning
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A cigarette pack configured in the form of a sealed pack consists of an inner pack configured in the form of a sheet-material block (11) and of an outer pack (25) configured in the form of a hinge-lid box. An opening aid (18) of the sheet-material block (11) is provided with a removal opening (19) which is formed in the manner of an open aperture, by punching, during production of a blank for the sheet-material block (11), in particular in the region of a continuous sheet-material web. Said removal opening (19), which is free from the outset, is closed by a closure flap (20) which, on account of appropriate glue connection, can be opened and closed repeatedly. The closure flap (20) is preferably connected on a permanent basis, via an actuating flap (24), to the inner side of a lid front wall (31) of the outer pack (25).