Cigarette Pack Closure Label Alignment and Adhesion

Solution Overview

Problem

Cigarette packs with multi-closable sealing blocks face challenges in creating a reliable adhesive connection between the closure label and the lid, and in designing the pack for precise and reliable attachment of the closure label, while also maintaining an optimal appearance.

Innovation Solution

The pack design aligns the inner lid tab with the collar of the folding box, ensuring the lid lies within the collar's recess when closed, with projections and counter-projections to enhance contact pressure for a durable adhesive connection, and features a closure label with retaining strips and a connecting piece for secure attachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the closure label is permanently attached to the lid by adhesive bonding, then the connection reliability is improved, but the manufacturing precision and alignment accuracy deteriorate

Engineering Contradiction:

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The closure label's own structure (protrusions and recesses) performs the alignment function, making the system self-aligning during assembly without requiring external fixtures or high-precision positioning equipment

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The adhesive bonding process transforms the closure label from a movable component to a permanently fixed component, creating a rigid connection that maintains alignment over time while the molding process creates complementary geometric parameters (protrusions and recesses) for precision positioning

Inventive Principle:

Principle #35Parameter changes

2Shape

If the inner lid tab is aligned with the collar recess to improve appearance, then the aesthetic quality is improved, but the adhesive connection reliability deteriorates

Engineering Contradiction:

Core Design Contradiction:

ShapeVSReliability

Solution Approach 1:

Different regions of the closure label serve different functions: the protrusions and recesses provide localized mechanical interlocking for reliable connection, while the overall alignment with the collar recess provides aesthetic appearance, allowing both requirements to coexist through spatial differentiation of functions

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The closure label combines geometric interlocking features (protrusions and recesses) with adhesive bonding material, creating a composite connection system that provides both mechanical strength and aesthetic alignment with the collar recess

Inventive Principle:

Principle #40Composite materials

3Reliability

If projections and counter-projections are added to enhance contact pressure, then the adhesive bonding reliability is improved, but the device complexity increases

Engineering Contradiction:

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The closure label is segmented into distinct functional features (protrusions and recesses) that can be independently molded and assembled, allowing the complex bonding function to be achieved through modular geometric elements rather than a monolithic complex structure

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP3284699B2Cigarette package

Publication Date: 2024.05.15

Figure 1~2
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Figure 5~6

AI summary

A cigarette pack with an outer pack (10) in the form of a hinged box and an inner pack (11) as a sealing block is provided with an opening flap (21) for the inner pack (11) and a closure label (23) for actuating the opening flap (21). The closure label (23) is fixed to the inside of a lid front wall (34) by means of an actuating flap (28) and can be moved into the open position with the lid (30). Pressure elements (45, 46) cause the closure label (23) with adhesive pads to be pressed against the inside of the lid front wall (34).