Reclosable Flap Cigarette Pack for Clean Adhesive Sealing

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Solution Overview

Problem

Existing cigarette containers face challenges in achieving consistent adhesive bonding strength for reclosable flaps, leading to issues such as lid damage, flap detachment, and adhesive contamination by tobacco crumbs, while also complicating manufacturing and preserving tobacco quality.

Innovation Solution

A container design with a hinged lid and reclosable flap system that includes a first lid panel brushing the reclosable flap during closure to ensure precise attachment, reducing adhesive interference and minimizing lid smiling, while using a ratio of lid panel dimensions to control movement and prevent machine jams.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If adhesive strength is increased to ensure sealing, then sealing reliability is improved, but lid damage occurs during first opening

Engineering Contradiction:

Improvesealing reliabilityVSAvoidlid strength

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The adhesive is applied selectively only in specific regions where the reclosable flap contacts the inner package, rather than across the entire surface. This localized application ensures adequate bonding strength for sealing while minimizing the risk of lid damage during opening operations.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The adhesive bonding is divided into discrete application zones corresponding to different functional areas of the reclosable flap. This segmentation allows different regions to have different bonding characteristics optimized for their specific functions.

Inventive Principle:

Principle #1Segmentation

2Strength

If adhesive strength is decreased to prevent lid damage, then lid integrity is preserved, but flap detachment occurs

Engineering Contradiction:

Improvelid strengthVSAvoidflap attachment reliability

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

Inventive Principle:

Principle #3Local quality

3Device complexity

If adhesive area is reduced to simplify bonding, then manufacturing complexity is decreased, but sealing effectiveness is compromised

Engineering Contradiction:

Improvebonding complexityVSAvoidsealing effectiveness

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

Inventive Principle:

Principle #3Local quality

4Strength

If adhesive is applied to entire surface, then bonding strength is maximized, but tobacco crumb contamination increases

Engineering Contradiction:

Improvebonding strengthVSAvoidtobacco crumb contamination

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP3625149B1Container for consumer goods with reclosable flap and blank

Publication Date: 2025.12.03 JT INTERNATIONAL SA

Figure 1
Figure 2~3A
Figure 3B

AI summary

The invention refers to a container (1) for consumer goods, such as smoking articles, having an outer housing with a hinged lid (3) that houses an inner package of consumer goods, as well as to a method of forming the container. The inner package (5) has an access opening (6) through which consumer goods can be removed and that is covered by a reclosable flap (8), which is attached to a first lid panel (32) that is relatively movable to a second lid panel (33) throughout rotation of the lid between lid open and closed positions. Prior to attachment of the reclosable flap (8) to the first lid panel (32), the first lid panel (32) is configured to come into contact with a top surface (82) of the reclosable flap (8) as the hinged lid (3) is moved from the open position towards the closed position.