Cigarette Pack Collar Window for Lid Closing Reliability
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Solution Overview
Problem
Existing cigarette packs face issues with the closing behavior, particularly with the lid getting caught on side seams of the inner pack, and concerns about the front collar wall obstructing the reliable bonding of the opening flap to the lid.
Innovation Solution
A pack design featuring a collar with a recess forming a collar window, where the lower edge of the opening tab is positioned below the collar window, preventing lid entrapment and ensuring easy removal of contents, with the collar front wall glued to the box part and an inner flap on the lid, allowing for automatic opening and closing of the removal opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lid is designed to close tightly against the box part, then the closing reliability is improved, but the lid may catch on the side seams of the inner pack causing closing failures
Solution Approach 1:
The collar acts as an intermediary element between the lid and the inner pack. It provides a smooth guiding surface that mediates the closing motion, preventing the lid from directly contacting and catching on the side seams of the inner pack while still allowing reliable closure.
Solution Approach 2:
The collar divides the closing interface into separate functional zones: the collar window area guides the lid closure, while the collar sides protect against seam catching. This segmentation allows each zone to optimize its specific function without interfering with the other.
2Reliability
If the opening tab is positioned higher to improve sealing, then the bonding reliability is improved, but the removal opening becomes too small for comfortable content removal
Solution Approach 1:
The collar window provides a localized opening in the front collar wall that specifically addresses the content removal need. This local quality change allows the opening tab to be positioned optimally for bonding while the collar window independently provides sufficient clearance for removing contents.
3Strength
If the front collar wall is present to provide structural support, then the package strength is improved, but it obstructs the bonding of the opening flap to the lid
Solution Approach 1:
The collar is segmented with a collar window that creates a bonding zone. This segmentation allows the front collar wall to maintain structural support while the window area provides unobstructed access for bonding the opening flap to the lid.
Solution Approach 2:
The collar window extracts or removes the obstructing portion of the front collar wall in the bonding region. This extraction eliminates the interference with bonding while preserving the structural function of the remaining collar wall.
Data Source
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AI summary
The invention relates to a package for products (11) of the cigarette industry, comprising an outer package (12) which has a box part (13) and a lid (14) pivotably arranged on the box part (13), and wherein an inner package (15), preferably designed as a sealing block, is arranged in the outer package (12) and contains products (11) of the cigarette industry as package contents, and wherein the inner package (15) has a dispensing opening (16) which can be opened or closed by a multi-actuated opening tab (17) of the inner package (15), and wherein the opening tab (17) is attached to the lid (14) of the outer package (12) in a connection area (18) such that the dispensing opening (16) is automatically released when the lid (14) is opened and automatically closed when the lid (14) is closed.According to the invention, a collar (19) is arranged in the box part (13), which abuts corresponding walls of the box part (13) on the inside with collar front wall (20) and collar side walls (21) and projects out of the top open box part (13), and wherein the collar front wall (20) has a recess (22) to form a collar window, and wherein a lower edge of the connecting area (18) is arranged at the level of a lower edge (24) of the collar window or above it (with a distance X).