Tamper-Evident Drop Dispensing Closure with Integrated Venting
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Solution Overview
Problem
Existing dispensing closures for containers lack precision in dispensing measured drops of essential oils and other fluids, and they often fail to provide adequate tamper evidence and hermetic sealing, leading to product waste and quality issues.
Innovation Solution
A one-piece drop dispensing closure with an integrally formed closure body, tamper-evident skirt ring, hinged cap, hermetic seals, integrated drainback and venting system, and a latch back mechanism for maintaining the cap in an open position, allowing for adjustable orifice and vent dimensions to control drop size and frequency, while ensuring product integrity through tamper evidence and dual hermetic sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional multi-component dispensing closure is used, then assembly flexibility is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent combines multiple separate components (closure body, cap, seal, and dispensing mechanism) into a single integrated one-piece closure structure. This merging eliminates the need for assembly of multiple parts while maintaining all necessary functions, thereby reducing manufacturing complexity and cost without sacrificing adaptability.
2Manufacturing precision
If the vent tube length is increased to improve venting, then dispensing control is improved, but the closure cannot sit flat on the skirt ring during filling and capping
Solution Approach 1:
The patent employs a flexible membrane that dynamically adjusts venting based on the closure's orientation and pressure conditions. The membrane can deflect to allow venting when needed while maintaining a compact structure that sits flat during filling and capping operations, eliminating the need for a long rigid vent tube.
3Reliability
If the cap is kept closed to maintain product freshness, then hermetic sealing is improved, but clean dispensing is compromised
Solution Approach 1:
The patent segments the sealing function from the dispensing function by incorporating a frangible seal that breaks during initial opening to allow clean dispensing, while a secondary latch mechanism maintains closure for freshness preservation. This segmentation allows both hermetic sealing and clean dispensing to function optimally at different stages.
4Productivity
If essential oils are dispensed without precise drop control, then dispensing speed is improved, but product waste increases
Solution Approach 1:
The patent utilizes the viscoelastic properties of essential oils and controls the dispensing parameters (orifice size, pressure differential, and flow rate) to achieve precise drop formation. By optimizing these parameters, the system maintains rapid dispensing while ensuring each drop is of controlled size, minimizing waste.
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 enables precise dispensing of essential oils with reduced waste and extended product freshness by ensuring accurate drop control and maintaining product quality through tamper evidence and hermetic sealing, while also reducing manufacturing costs through a flexible molding process.
Implementation Method 1
A tamper-evident skirt ring is connected to a lower peripheral edge of the skirt portion by a plurality of frangible security elements. Removal of the closure from the bottle prior to purchase will sever the frangible elements clearly indicating tampering with the product.
Implementation Method 2
A hinged cap is connected to the closure body via an integrally formed living hinge which provides for hinged movement of the cap between a closed position and an open position.
Implementation Method 3
The outside surface of the side wall is received into the container neck and is contoured and sized for frictional sealing engagement with the inner surface of the container neck to provide a seal when the closure is threadably received on the container.
Implementation Method 4
The leading edge of the drip lip has an acute edge angle of less than 45 degrees to provide a clean drop cut off to minimize drainback.
Implementation Method 5
Excess oil is drawn down the outside of the spout into the drainback recess, and further down the angled bottom wall of the drainback recess into the vent tube and eventually down through the vent opening into the interior of the container.
Data Source
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AI summary
A one-piece dispensing closure for dispensing essential oils includes an integrally formed closure body, tubular dispensing spout, a hinged cap, a tamper-evident closure system and a latch for maintaining the cap in an open position. The cap is connected to the closure body by a living hinge to allow the user to selectively open and close the container. A tamper-evident tear strip is integrally formed with the closure body. A locking tab on the cap engages a shoulder on the tear strip to prevent opening of the cap without removing the tear strip.