Semi-Rigid Cigarette Pack Frame with Flexible Barrier
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Solution Overview
Problem
Existing packaging solutions for smoking articles, such as cigarettes, face challenges in balancing protection and cost, with rigid packs being complex and costly, and soft packs being prone to damage during transport. Re-sealable packs with low rigidity struggle with maintaining freshness due to difficulties in re-sealing, especially when articles are partially consumed.
Innovation Solution
A semi-rigid pack design featuring a frame of semi-rigid material with a flexible barrier sheet and a re-sealable flap, where the frame provides structural stability and counter-support for effective re-sealing, using a semi-rigid sheet material like card or paperboard with cut-out regions in side flaps for enhanced stability and a soft feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid pack structure is used, then protection of smoking articles is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent employs a flexible barrier sheet as the outer packaging structure instead of a rigid shell. The barrier sheet is sealed to form a protective enclosure that maintains flexibility while providing adequate protection for the smoking articles, thereby reducing construction complexity and manufacturing cost compared to rigid packs.
Solution Approach 2:
The packaging system combines a frame made of semi-rigid material with a flexible barrier sheet to create a composite structure. This hybrid approach provides the necessary protection for the smoking articles while maintaining simplicity in construction and assembly, avoiding the complexity of fully rigid packs.
2Device complexity
If a soft pack structure is used, then construction simplicity is improved, but protection against damage during transport deteriorates
Solution Approach 1:
The patent uses a flexible barrier sheet that provides a degree of structural support while maintaining construction simplicity. The sealed enclosure formed by the barrier sheet offers protection against damage during transport, bridging the gap between soft pack simplicity and rigid pack protection.
Solution Approach 2:
By combining a semi-rigid frame with a flexible barrier sheet, the patent creates a composite packaging structure that enhances protection against damage during transport while retaining the construction simplicity characteristic of soft packs.
3Reliability
If a re-sealable soft inner pack is used, then freshness of smoking articles is improved, but ease of re-sealing deteriorates due to low rigidity
Solution Approach 1:
The patent combines a semi-rigid frame with a flexible barrier sheet to create a re-sealable pack that maintains sufficient rigidity for easy re-sealing operations. The semi-rigid frame provides the necessary structural support to enable effective sealing while the flexible barrier sheet maintains freshness, resolving the contradiction between freshness preservation and ease of re-sealing.
Data Source
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AI summary
The present invention provides a pack (P) of smoking articles (C), comprising a frame (2) of a semi-rigid material having preferably a major panel (3), side flaps (4) and an end flap (5), which are arranged adjacent a face, opposite sides, and an end, respectively, of a charge (G) of smoking articles; and a flexible barrier sheet (12) around the charge (G) and the frame (2), forming a sealed enclosure; wherein at least one of the side flaps (4) has a cut-out region (7) such that said at least one side flap (4) is discontinuous over a length (L) of the respective opposite side of the charge (G) of smoking articles (C). The present invention also provides a method of packaging smoking articles in such a pack (P).