Paperboard Packaging Container With Click-Lock Reclosure

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Solution Overview

Problem

Existing paperboard packaging containers for bulk solids face challenges in maintaining freshness and hygiene after repeated openings, especially when made entirely of paperboard without plastic components, as they lack effective closure mechanisms that provide a clear indication of proper reclosure and may lose rigidity over time.

Innovation Solution

A paperboard packaging container with a tubular body and lid collar, featuring a slit or weakening means for separation, and a locking arrangement with mating protrusion and recess elements that ensure a distinct click sound and improved sealing, enhancing user confidence in reclosure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If plastic rims or plastic locking arrangements are used to improve tightness when closing the container, then sealing performance is improved, but manufacturing cost increases and recyclability deteriorates

Engineering Contradiction:

Improvesealing performanceVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies homogeneity by using paperboard material for all container components including the lid, collar, and locking elements. This eliminates the need for plastic parts while maintaining functional integrity, achieving both cost reduction and improved recyclability without sacrificing sealing performance.

Inventive Principle:

Principle #33Homogeneity

Solution Approach 2:

The patent employs composite construction by combining paperboard with specific structural designs including integrated locking elements, recesses, and collars. This allows the single material (paperboard) to perform multiple functions that traditionally required different materials, achieving plastic-free construction with adequate sealing.

Inventive Principle:

Principle #40Composite materials

2Reliability

If plastic locking arrangements are used to improve tightness when closing the container, then sealing performance is improved, but recyclability deteriorates

Engineering Contradiction:

Improvesealing performanceVSAvoidrecyclability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The container is constructed entirely from paperboard material, creating a homogeneous structure that is fully recyclable. The locking elements, collars, and lid are all made from the same material, eliminating contamination issues that would arise from mixed materials and ensuring optimal recyclability while maintaining sealing function.

Inventive Principle:

Principle #33Homogeneity

3Adaptability or versatility

If an all-paperboard container is used, then recyclability is improved, but the container loses rigidity at the opening end over time

Engineering Contradiction:

ImproverecyclabilityVSAvoidrigidity at opening end

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The transport closure is attached to the container body before the product is filled and transported. This preliminary closure provides structural support to the opening end during the most demanding phase (transport), preventing deformation. After the product is consumed, the closure is removed and the container is recycled, achieving both rigidity when needed and recyclability ultimately.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The closure system is segmented into a removable transport closure and a permanent lid structure. The transport closure provides temporary reinforcement during shipping, while the lid with its integrated collar and locking elements provides ongoing structural support at the opening end throughout the product's usage life, maintaining rigidity without compromising recyclability.

Inventive Principle:

Principle #1Segmentation

4Adaptability or versatility

If an all-paperboard container is used, then recyclability is improved, but it becomes difficult to provide indication of proper reclosure

Engineering Contradiction:

ImproverecyclabilityVSAvoidindication of proper reclosure

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The locking elements provide tactile feedback through a distinct click sound when properly engaged. The protrusion on the lid must overcome the resistance of the recess in the container body, creating an audible and tactile confirmation that the container is properly closed. This feedback mechanism works effectively with paperboard material, giving consumers clear information about proper reclosure without requiring plastic components.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP3442875B2Paperboard packaging container and lid and method of producing

Publication Date: 2025.10.08 AR PACKAGING SYST AB

Figure 1a
Figure 1b
Figure 2a~2e

AI summary

The present disclosure provides a paperboard packaging container (1) comprising a tubular paperboard container body (3), a container bottom (4) and a container lid (5). The lid (5) comprises a lid collar (18) having an abutment edge (19) adapted for abutting against a container body abutment edge (8), and a lid plug-in portion (15). The lid collar (18) is made of the same material as the container body (3) and is delimited from the container body (3) by a slit (20') or by weakening means (20") for allowing the lid collar (18) to be fully or partially separated from the container body (3) at the abutment edges (19, 8). The container (1) is provided with a locking arrangement (21, 22) for retaining the container lid (5) in the closed position. Moreover, the disclosure pertains to a method of producing the paperboard packaging container.