Integrated Closure Cap with Pull-Tab Sealing for Pourable Food Containers
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Solution Overview
Problem
Existing closures for pourable food containers, especially those made of multilayer cardboard and plastic, face issues with material waste, high production costs, and require a two-step operation for unsealing, which is inefficient and labor-intensive.
Innovation Solution
A closure system featuring a pouring spout with a gas- and/or light-barrier material, integrated cap, and a disk-shaped cover portion, where the cap is removable and reseals the spout through a single-step operation, eliminating the need for additional costly materials and simplifying the unsealing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a two-step unsealing operation is used (unscrew cap then tear off aluminum foil), then gas-tight closure is achieved, but user effort and operation time increase
Solution Approach 1:
The patent merges the cap and aluminum foil into a single integrated closure unit. The cap is designed with an integrated sealing element that combines the functions of both the cap and foil in one component, allowing single-step removal that simultaneously achieves unsealing and maintains gas-tight closure when reattached.
Solution Approach 2:
The closure is segmented into functional zones: the cap portion for user interaction and the integrated sealing element for gas-tight closure. This segmentation allows the sealing element to be positioned optimally within the cap structure, enabling single-step removal while maintaining reliability.
2Reliability
If aluminum foil is welded to the pouring spout for gas-tight closure, then sealing is improved, but production cost and complexity increase
Solution Approach 1:
The patent integrates the sealing function directly into the cap structure by combining the cap and aluminum foil into a single molded component. This eliminates the need for separate welding operations and reduces structural complexity while maintaining gas-tight closure.
Solution Approach 2:
The closure utilizes composite material construction where the cap and sealing element are formed as an integrated structure. This composite approach allows the sealing function to be built-in during molding rather than added through separate welding processes, reducing complexity.
3Manufacturing precision
If thermoforming with sheet body is used to produce closure, then forming precision is improved, but production time and material waste increase
Solution Approach 1:
The closure is pre-formed as a complete integrated unit during the molding process, including all sealing elements and structural components. This preliminary formation eliminates subsequent assembly steps and reduces material waste by ensuring precise fit from the outset.
Solution Approach 2:
The patent combines multiple forming operations into a single integrated molding process. The cap, sealing element, and structural components are formed simultaneously in one operation, maintaining precision while significantly improving production efficiency by eliminating sequential steps.
Data Source
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AI summary
There is described a closure (1) for a sealed container of a pourable food product, comprising a pouring spout (2) defining a pour opening (3) externally closed by a cover portion (15), a cap (4) fitted to the pouring spout (3) in a removable way, an opening member (16) interposed between the cap (4) and the cover portion (15) of the pouring spout (2) and joined to the cover portion (15), and driving means (9, 35, 41) carried by the cap (4) to engage and pull the opening member (16) along a direction (A) transversal thereto upon removal of the cap (4) from the pouring spout (2) so as to detach the cover portion (15) from the neck portion (6) and free the pour opening (3) when the closure (1) is first unsealed by the user.