Hermetic Food Packaging Case with Resealable Closure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing packaging solutions for solid, semi-liquid, and pasty foodstuffs, such as chocolate bars, are either not airtight or moisture-proof, requiring additional packaging and are difficult to open and reseal, while solutions for liquids are not resealable and have complex assembly processes.
Innovation Solution
A pre-cut cardboard blank with airtight and moisture-proof layers, featuring a flap system with adhesive or heat-sealable films, and a knee-length pre-cut system for easy opening and resealing, allowing for hermetic packaging of foodstuffs by simple folding and sealing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cardboard packaging case with a knee-length cutting system is used, then the opening flap can be easily opened, but the case is not airtight or moisture-proof
Solution Approach 1:
The patent applies composite materials by combining cardboard with an airtight and moisture-proof coating layer. The blank is made from cardboard material that is coated with a barrier material (such as plastic or wax) to create a composite structure that provides both the structural integrity of cardboard and the hermetic properties of the coating, thereby achieving both ease of opening and hermetic sealing
Solution Approach 2:
The patent uses thin film technology by applying an airtight and moisture-proof coating layer on the cardboard blank. This coating acts as a flexible barrier film that maintains the flexibility of the cardboard while providing hermetic protection, allowing the case to be easily opened and closed while maintaining seal integrity
2Reliability
If a heat-sealing closure system is used for liquid packaging, then the case can be sealed, but it is not resealable and has complex assembly
Solution Approach 1:
The patent segments the closure system into separate components: a flap that can be opened and closed, and a resealable closure mechanism. The blank includes a flap that can be folded over the opening and secured with a closure system that allows repeated opening and closing while maintaining hermetic seal, thereby providing both reliable sealing and resealability
Solution Approach 2:
The patent implements a dynamic closure system where the flap can move between open and closed positions, and the closure mechanism can be repeatedly engaged and disengaged. This dynamic design allows the case to be sealed hermetically when closed while enabling easy reopening and reclosing, unlike static heat-sealing systems
3Reliability
If multiple fold lines and heat-sealed bands are used, then the case can be assembled, but the assembly process becomes difficult
Solution Approach 1:
The patent applies preliminary action by pre-creasing the fold lines on the blank before assembly. The fold lines are pre-formed during blank manufacturing, which simplifies the assembly process by eliminating the need for complex folding operations during case assembly, thereby reducing assembly difficulty while maintaining case stability
Solution Approach 2:
The patent merges the closure function and structural support into a single integrated closure strip system. The closure strip combines both the sealing function and the structural support function, eliminating the need for separate heat-sealed bands and multiple fold lines, thereby simplifying assembly while maintaining case stability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a hermetic, resealable, and easy-to-open packaging case suitable for various food types, eliminating the need for additional protective films and reducing waste, while ensuring the foodstuff remains fresh and protected until consumption.
Implementation Method 1
the closure strips are provided with an adhesive or heat-sealable film
Implementation Method 2
the closure strips are provided with an adhesive or heat-sealable film
Implementation Method 3
At least one side of the pre-cut blank is provided with an airtight and/or moisture-proof layer
Data Source
Figure 1
Figure 2~4
AI summary
A hermetic packaging case for a foodstuff, of the type formed by folding, fixing and shaping a pre-cut blank covered on its inner face (1b) with a coating such that its internal volume is airtight and/or moisture-proof, this blank comprising at least one front panel (2), one back panel and two side panels (3, 4) positioned between the front and back panels, these four panels being joined and articulated together by fold lines to form a case body, this case body being provided at one end with a closure strip (10) connected to these at least four panels by means of a connecting strip (9) folded in a beveled profile, the closure strip being folded and sealed on itself.