Tamper-Evident Opening Device for Pourable Packaging
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Solution Overview
Problem
Existing reclosable opening devices for pourable product packaging lack effective tamper-evidence mechanisms beyond visual indicators, and there is a need for a solution that can be easily recognized by users with poor eyesight or in dark environments.
Innovation Solution
A reclosable opening device with a tamper-evidence ring connected by breakable bridges, where the cap is hinged to the tamper-evidence ring, allowing rotational movement as an indicator of first opening, ensuring the cap remains attached to the spout and package, providing a tactile and visual indication of opening status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If visual indicators alone are used for tamper-evidence, then the device structure remains simple, but users with poor eyesight or in dark environments cannot effectively detect opening status
Solution Approach 1:
The tamper-evidence function is segmented into two independent systems: visual indicators (breakable bridges) and tactile indicators (rotational movement detection). This allows each system to serve its specific user needs without requiring the entire device to be complex, resolving the contradiction between detectability and structural simplicity.
Solution Approach 2:
The cap acts as an intermediary element that provides both visual and tactile feedback. The breakable bridges provide visual tamper-evidence while the cap's rotational movement provides tactile feedback, making the opening status detectable through multiple senses without adding excessive complexity to the overall device.
2Ease of operation
If the cap is made detachable from the spout for easy opening, then user convenience is improved, but the sealing functionality and prevention of re-closure are compromised
Solution Approach 1:
The cap is designed with dynamic characteristics - it can rotate freely to indicate opening status but maintains a secure attachment to the spout through the breakable bridges. This dynamic design allows easy opening while preserving sealing functionality, as the cap remains attached during normal use and only detaches when the bridges break during forced opening.
Solution Approach 2:
The breakable bridges are pre-configured to break under excessive force, providing a preliminary safety mechanism. This preliminary action prevents accidental detachment during normal use while allowing intentional opening, thus maintaining reliability without compromising ease of operation.
3Loss of information
If breakable bridges are used for tamper-evidence, then visual indication of opening is provided, but the mechanism becomes vulnerable to accidental breaking
Solution Approach 1:
The cap serves as an intermediary that provides alternative tamper-evidence through rotational movement. This secondary indicator complements the breakable bridges, providing reliable opening status indication even if the visual indicators fail or are accidentally broken, thus resolving the contradiction between visual indication and reliability.
Solution Approach 2:
The system utilizes different physical parameters for tamper-evidence: the breakable bridges provide visual changes (color, shape) while the cap's rotational movement provides tactile parameter changes. This multi-parameter approach ensures reliable indication without over-reliance on any single mechanism that could accidentally break.
Data Source
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AI summary
There is described an opening device (1) configured to be applied to a packaging (3) for pourable products, the opening device (1) comprises: a pouring spout (10) defining a pouring opening through which to pour, in use, the pourable product; a cap (12) configured to engage and disengage the pouring spout (10) to respectively close and open the pouring opening; a closing element (30) closing and/or sealing the pouring opening, formed in one piece with the pouring spout (10) and connected to the pouring spout (10) by a breakable connecting portion (31) configured to break during first opening of the opening device (1); the closing element (30) comprising a protruding portion (24) extending through the pouring opening and connected to the cap (12); and tamper-evidence ring (21) fitted to the pouring spout (10); wherein the cap (12) is hinged to the tamper-evidence ring (21) thereby being permanently tethered to the pouring spout (10) .