Packaging Sealed Seam with Projection for Controlled Dispensing
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Solution Overview
Problem
Conventional packaging for liquid, powdery, or pasty products is prone to undesired early discharge due to weakness at the bending line, requires offset dispensing channels to prevent mixing, and can inadvertently open when bent, making it difficult to manufacture and open while ensuring controlled dispensing.
Innovation Solution
A packaging design featuring a sealed seam with a projecting portion within the dispensing channel that acts as a predetermined breaking point, allowing controlled opening under internal pressure, and multiple hollow spaces for separate product containment, with offset sealed seams and a cut-out on the bending line to manage dispensing and separation forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the packaging is bent at the bending line to open dispensing channels, then the packaging can be opened for dispensing, but the packaging may open up inadvertently or too early due to weakness at the bending line
Solution Approach 1:
A projection is provided on the inner side of the sealed seam, which serves as a predetermined breaking point. This projection is formed during the sealing process and is positioned to be the first area to fail under internal pressure, ensuring controlled opening at the intended location rather than inadvertent opening at the bending line
Solution Approach 2:
The sealed seam has non-uniform structure with a projection at a specific location. This local structural feature creates a predetermined weak point that will fail first under pressure, while other areas of the sealed seam remain intact. The projection's geometry (acute angle) is specifically designed to concentrate stress at the intended opening location
2Reliability
If the dispensing channels are offset relative to each other to prevent product mixing, then product flow control is improved, but the products cannot be mixed immediately when they flow out, which may be undesirable
Solution Approach 1:
The packaging is divided into multiple sealed chambers with separate dispensing channels. Each channel can be opened independently through its own sealed seam, allowing products to be dispensed separately or mixed by the user at the point of use, providing flexibility in product delivery
3Shape
If a deep-drawn container and lid film are connected along a bending line, then the packaging can be formed into a usable shape, but the connection area is weakened making early discharge possible
Solution Approach 1:
The packaging is divided into multiple sealed chambers with separate dispensing channels. Each channel can be opened independently through its own sealed seam, allowing products to be dispensed separately or mixed by the user at the point of use, providing flexibility in product delivery
Solution Approach 2:
The sealed seam is formed with a projection that serves as a predetermined breaking point. This projection is created during the sealing process and is positioned to fail first under internal pressure, ensuring controlled opening at the intended location rather than at the bending line connection area
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
Enables precise, controlled dispensing of products while preventing early opening and mixing, ensuring reliable containment and efficient product flow through defined channels, even when subjected to pressure, and allows for separate use of multiple products.
Implementation Method 1
If a higher pressure is built up in the hollow space of the packaging, e.g. by pressing the packaging together, this pressure also acts on the sealed seam, where it attempts to separate the two packaging parts
Data Source
AI summary
The disclosure relates to a packaging for a liquid, powdery or pasty product, comprising a first packaging part and a second packaging part which are connected to each other along a connecting area to define between them a hollow space to receive the product, wherein a channel is provided between the first packaging part and the second packaging part, which is to be opened by opening a sealing element to dispense the product from the packaging. The disclosure is characterized in that the sealing element is a sealed seam between the first packaging part and the second packaging part, which seals the channel, and that the sealed seam comprises inside the channel at least one portion which projects in a longitudinal direction of the channel. The disclosure also relates to a packaging machine for manufacturing such a packaging.