Spout Closure with Hinged Cap and Breakable Seal
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Solution Overview
Problem
Existing spouted pouch closures for thin-walled packagings often result in the cap separating from the spout after the first opening, leading to potential environmental issues as the spout can be lost separately from the pouch.
Innovation Solution
A closure system where the cap remains connected to the spout and pouch after the first opening, utilizing a single-piece plastic closure with a snap-fit mechanism and a guarantee seal that breaks upon first use, ensuring all components are disposed of together.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the cap is designed to separate from the spout after first opening, then the closure mechanism is simple and easy to manufacture, but the spout can be lost separately in the environment causing pollution
Solution Approach 1:
The closure is divided into distinct functional components: a cap assembly with cap and guarantee seal, a base body with threading and snap-fit mechanism, and a hinge connecting them. This segmentation allows each part to perform its specific function while maintaining the overall integrity of the closure system throughout its lifecycle.
Solution Approach 2:
The cap assembly is connected to the base body through a hinge, with the cap rotating relative to the base body. The guarantee seal is nested within the closure structure, breaking upon opening to irreversibly connect the cap assembly to the base body, ensuring the spout remains attached to the pouch.
Solution Approach 3:
The guarantee seal is pre-configured in an intact state that maintains the closure's sealed condition. Upon first opening, the guarantee seal breaks in advance to permanently connect the cap assembly to the base body, preventing subsequent separation and ensuring the spout is not lost.
2Object-affected harmful factors
If the cap remains connected to the spout after first opening, then environmental pollution is reduced, but the closure mechanism becomes more complex
Solution Approach 1:
The cap assembly, base body, and hinge are combined into a single integrated closure system made from a single piece of plastic material through injection molding. This merging reduces the number of separate components while maintaining the complex functional requirements of preventing cap-spout separation.
Solution Approach 2:
The single-piece plastic closure serves multiple functions simultaneously: it provides sealing through the guarantee seal, enables opening through cap rotation on the hinge, ensures permanent attachment through the snap-fit mechanism, and prevents environmental pollution by keeping the spout connected to the pouch throughout its lifecycle.
3Ease of manufacture
If a single-piece plastic closure is used, then manufacturing is simplified and environmental impact is reduced, but the guarantee seal mechanism becomes more difficult to implement
Solution Approach 1:
The guarantee seal is pre-configured in an intact state during the single-piece injection molding process, with the breakable bridge already formed connecting the cap assembly to the base body. Upon first opening, this pre-configured seal breaks to irreversibly connect the components, simplifying the manufacturing process while maintaining the security function.
Solution Approach 2:
The guarantee seal utilizes changes in the physical state and structural integrity of the plastic material during molding and subsequent use. The breakable bridge is designed with specific structural parameters that allow it to break upon opening while maintaining the overall integrity of the single-piece closure system.
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 closure system effectively prevents the spout from being lost separately, promoting more responsible waste disposal and reducing environmental impact by ensuring all packaging components are disposed of together.
Implementation Method 1
The guarantee seal comprises a breakable bridge which, when intact, connects the cap assembly to the base body in an irreversible manner upon breaking
Implementation Method 2
The base body is provided with a snap-fit mechanism for engaging the spout
Data Source
AI summary
A closure for a spout of a flexible thin-walled packaging is provided. The closure has a base body having an irreversibly yielding guarantee wall, a cap assembly having a cap and a guarantee tab, at least one breakable bridge, and a flexible hinge that joins the base body to the cap assembly. The at least one breakable bridge, in an intact closed configuration, is integral and joins the guarantee tab to the guarantee wall.